McCROMETER MLE Mainline Flow Meters Instruction Manual

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ULTRA MAG
Water Specialties Mainline Flow Meters
Models MLE MLF MLU TP1 with Mechanical Registers Sizes 24″ – 54″
Installation, Operation and Maintenance Manual
Previously for Models ML03 ML19 MLT1

Hach’s Flow Solutions by

30125-99 Rev. 1.0 11OCT2024

Contents
SAFETY SYMBOLS AND WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1 .0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .1 Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .2 Main line flow meter installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .3 Flanged tube meter installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .4 Welding saddle meter installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .5 Straightening vane installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1 .6 Welding saddle attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1 .7 Meter assembly installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1 .8 Register extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 .0 MAINTENANCE AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2 .1 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2 .2 Meter assembly drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2 .3 Removing the meter head assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2 .4 Service procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 2 .4 .1 Clean and inspect totalizer assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 2 .4 .2 Remove and inspect vertical shaft assembly and gearbox . . . . . . . . . . . . . . . . . . . . . . . . . .8 2 .4 .3 Remove and inspect miter gear frame assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 2 .4 .4 Remove and clean propeller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 2 .4 .5 Remove and clean separator/support spindle assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 .4 .6 Reinstall propeller and propeller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2 .5 Reassembling the meter assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2 .6 Reinstalling the meter head assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 .0 TROUBLESHOOTING AND SERVICE SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 .0 ORDERING REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 .0 RETURNING A UNIT FOR REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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Safety Symbols and Warnings

SAFETY SYMBOLS AND WARNINGS
Throughout this manual are safety warning and caution information boxes. Each warning and caution box will be identified by a large symbol indicating the type of information contained in the box. The symbols are explained below:

This symbol indicates important safety information. Failure to follow the instructions can result in serious injury or death.

This symbol indicates important information. Failure to follow the instructions can result in permanent damage to the meter or installation site.

Safety Warnings
When installing, operating, and maintaining McCrometer equipment where hazards may be present, you must protect yourself by wearing Personal Protective Equipment (PPE) and be trained to enter confined spaces. Examples of confined spaces are manholes, pumping stations, pipelines, pits, septic tanks, sewage digesters, vaults, degreasers, storage tanks, boilers, and furnaces. You must follow all state and local laws, as well as Occupational Safety and Health Administration (OSHA) regulations concerning Personal Protective Equipment and confined-space entry. Specific requirements can be found in the OSHA section of the Code of Federal Regulations: 29 CFR, 1910.132 – 1910.140, Personal Protective Equipment; and CFR Title 29, Part 1910.146, Permit-Required Confined-Spaces.
WARNING!
! Incorrect installation or removal of meters can result in serious injury or death . Read the instructions in this manual on the proper procedures carefully.
WARNING!
! Never enter a confined space without testing the air at the top, middle, and bottom of the space . The air may be toxic, oxygen deficient, or explosive. Do not trust your senses to determine if the air is safe. You cannot see or smell many toxic gases.
WARNING!
! Never enter a confined space without the proper safety equipment . You may need a respirator, gas detector, tripod, lifeline, and other safety equipment.
WARNING!
! Never enter a confined space without standby/rescue personnel within earshot . Standby/rescue personnel must know what action to take in case of an emergency.

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Installation

1 .0 INSTALLATION

1 .1 Uncrating
When uncrating the meter, any damage due to rough or improper handling should be reported to the transportation firm and McCrometer. If for any reason it is determined that the unit or parts of the unit should be returned to the factory, please contact McCrometer for clearance prior to shipment. Each unit must be properly crated to prevent any further damage. The factory assumes no responsibility for equipment damage in return shipment due to improper packaging. The shipping crate contains the following items:
· Main line meter assembly with standard totalizer
· Mounting equipment as required
· Installation, operation, and maintenance manual
· Cutout template (welding saddle meter only)
· Tool T-2402X-1

1 .2 Main line flow meter installation
Mainline flow meter installation depends upon the type and model of meter selected for each application. The meter must have a full flow of liquid for proper accuracy. Installations described in this manual are: Flanged tube meter – ML03: see section 1.3 Welding saddle meter – ML19: see section 1.4 Meter head assembly – MLT1: see section 1.7
1 .3 Flanged tube meter installation
This applies to model ML03. Flanged tube meters can be installed exactly as you would install any short length of flanged pipe. Flanged ends are standard pattern and drilling for any meter size.
1 .4 Welding saddle meter installation
This applies to model ML19. Welding saddle meters can be installed on an existing pipeline by cutting a hole of proper size and welding a meter saddle (furnished with the meter) to the pipe. The installation steps outlined below should be followed carefully to achieve proper mounting of the meter: 1. Align the cutout template in the desired position for the meter on the pipe. Make certain that the center line of the
pipe and the center line marked on the template are parallel with each other. Some people prefer to use the saddle as the template. 2. Scribe the pipe along the line specified for your meter size cutout. 3. Cut out the section of pipe within the scribed line and remove all burrs, slag, and rough edges from the inside and outside of the cutout section. If your meter requires installation straightening vanes, proceed to section 1.5. Otherwise, proceed to section 1.7.
1 .5 Straightening vane installation
Straightening vanes are recommended when there is less than ten pipe diameters of straight pipe (no fittings or obstructions) directly upstream from the meter location. Straightening vanes are available from the factory and when required should be installed in the following manner, prior to welding the saddle to the pipe: 1. Hold the vanes on the outside of the pipe ten (10) inches upstream from the center of the cutout opening. The vanes
must be parallel to the center line of the pipe and should be equally spaced radially 120 degrees apart.

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Maintenance and Repair

2. Mark the pipe around the straightening vane bolts and burn or drill holes in the pipe where marked.
3. Insert the vanes into the pipe through the saddle cutout opening with the bolts protruding through the holes. Place seal (stainless steel with rubber) washers over each bolt, directly against the pipe. Brass washer should be placed between the washer and the nut. Secure nuts to hold vanes to the pipe. Nuts, bolts and washers not supplied. The vanes can be welded to the pipe if desired. NOTE: Meter head assembly (#13) should be removed before welding. (See section 2.3.)

1 .6 Welding saddle attachment
This applies to model ML19 only.
Note: Meter head assembly (#13) should be removed before welding. (See section 2.3.)
WELDING SADDLE should be centered over the cutout section of the pipe. Make certain that no part of the pipe protrudes past the inside edge of the welding saddle. Tack weld the saddle to the pipe prior to welding a continuous bead around the saddle.

1 .7 Meter assembly installation
See Figure 11. Meter assembly should be placed in the line with the propeller nose facing the upstream flow in the pipe. Use care when installing the meter not to damage the propeller as it passes through the saddle opening. The meter head gasket should be inspected for any sign of damage and replaced if necessary before installing the meter. Tighten the meter head bolts securely.

1 .8 Register extension
Instructions for installing the CN02 register extension with a flow meter can be found on the McCrometer Web site. See Lit. # 30116-03.
Direct link to document: https://bit.ly/3xdYgqB Link to Water Specialties document downloads: https://bit.ly/3rG9Aus

2 .0 MAINTENANCE AND REPAIR
McCrometer products have been carefully designed to be as maintenance free as possible. Periodic preventive maintenance, however, is highly recommended and should be practiced according to schedule to assure continuous accuracy and trouble-free performance of your propeller meters. The maintenance and inspection procedure can also be used as a guide to locating a problem in the unit that may be the cause of abnormal meter operation.
Routine preventative maintenance should be performed on all meters, which includes cleaning and an inspection of the propeller and its bearing. The intervals between inspections depend on the water quality and the usage of the meter. The initial inspection should be performed after one to two years of service, to determine the period between future inspections. After five to ten years, the complete meter should be inspected to insure years of dependable service.
Refer to the table of parts and part numbers (section 2.1) with the line drawing (2.2) on the following pages as you perform maintenance or repair on the meter.
NOTE The working area chosen for disassembly and reassembly of the internal meter components should be clean to reduce the chance of dust or dirt particles being introduced into the meter mechanism.

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Maintenance and Repair

2 .1 Parts list

All parts listed below are cross-referenced with call-outs in the meter assembly line drawing on the next page. (Figure 1)

No. Qty. Part No.

Description

1 7-MLT1-*

Main line meter head assembly

1 6-4260

Totalizer & bonnet complete

(items 1 through 6)

1 7-4260

Totalizer & bonnet complete

(items 1 through 8)

1 1 5-4316

Totalizer bonnet assembly

1 1-4317-3

Totalizer bonnet lid (w/pin)

2 1 1-1551-38

O-ring, totalizer bonnet

3 4 1-1115-10-10 Screw, bonnet mounting (ea.)

4 1 5-4260

Totalizer assembly (specify

dial)

1 2-2310-

Dial (as specified)

2 1-1118-3-3

Screw, dial mounting (ea.)

1 1-4276

Sweep hand

5 1 1-4318

Base cup, totalizer

6 1 1-1551-17

O-ring, base cup

7 1 3-4045

A – Gear assembly (specify #

of teeth)

8 1 3-4045

B – Gear assembly (specify # of

teeth)

12 1 3-2324

Drive Magnet assembly,

totalizer

13A 1 3-2101-24

Meter head (24″ – 36″)

13B 1 3-2101-42

Meter head (42′ – 54″)

14 1 3-2461-*

Vertical shaft assembly

15 1 3-2352

Vertical shaft collar & bearing

assembly

16 2 1-1113-6-4

Screw, vertical shaft collar &

bearing mounting (ea.)

17 1 3-2460-*

Drop pipe & gearbox assembly

18 1 1-1551-17

O-ring, drop pipe

19 8 1-1251-8-16

Bolt, drop pipe mounting (ea.)

20 – 1-1806

Vibra-tite, drop pipe mounting

bolt

21 1 4-2459

Miter gear frame assembly

(items 22 through 30)

22 1 2-2459

Miter gear frame

23 4 1-1504-2

Bearing, miter gear frame

(ea.)

24 1 3-2458

Driven magnet & shaft

assembly

25 1 2-2354

Driven magnet spacer

26 1 3-2349

Drive miter gear assembly

27 1 3-2137

Driven miter gear assembly

28 2 2-2148

Shim washer (ea.)

29 1 2-2138

Driven miter gear shaft

30 1 1-1551-2

O-ring, miter gear frame

No. Qty. Part No. 33 4 1-1103-8-7
34 1 4-2455-2
35 1 2-2455-2 36 1 1-1508-20
37 4 1-1103-8-7
38 1 1-1551-24 39 1 5-2425-14.0
40 1 3-2425-14.0-T 41 1 4-2426-1 42 1 1-1116-8-6
43 1 1-1601-2 44 1 1-2428-
45 2 1-1115-3-18
46 1 3-2402-2
47 1 1-1101-8-5 48 2 1-1509-1
49 1 1-1125-6 50 1 3-2356
51 2 1-1510-1
52A 1 1-1557-14 52B 1 1-1557-24 53A 12 1-1253-14-13
53B 20 1-1253-15-17
54A 12 1-1219
54B 20 1-1223
55A 12 1-1301-12-1
55B 20 1-1301-14-1
– — 1-1804-2 – 1 1-1607-5

Description Screw, miter gear frame mounting (ea.) Separator/support spindle assembly
Separator/support spindle Ceramic sleeve for support spindle Screw, separator/spindle mounting (ea.) O-ring, separator/spindle Propeller assembly (items 40 through 51) Propeller Ceramic bearing cartridge Screw, ceramic bearing cartridge mounting Drive magnet Drive magnet retaining plate Screw, drive magnet retaining plate (ea.) Reverse thrust bearing cartridge assembly
Set screw, thrust bearing Ceramic thrust bearing, 3/16″ diameter (ea.) Set screw, nylon tip Thrust bearing cartridge assembly Ceramic thrust bearing, 1/4″ diameter (ea.) Gasket, meter head (24″-36″) Gasket, meter head (42″-54″) Bolt, meter head 1 NC x 3 (24″36″) (ea.) Bolt, meter head 1¼” NC x 4″ (42″-54″) Nut, meter head bolt, 1 NC (24″-36″) (ea.) Nut, meter head bolt, 1¼” NC (42″-54″) Washer, meter head bolt, 1″ (24″-36″) (ea.) Washer, meter head bolt, 1¼” (42″-54″) Gearbox oil (16 oz.) Desiccant capsule

* Insert meter size to complete part number (use -24 for 24″; -30 for 30″, etc.)
Consult factory to complete part number

When ordering replacement parts, please specify:
· Meter Size · Meter Model · Meter Serial Number

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2 .2 Meter assembly drawing
B
F

Maintenance and Repair
C A

A Meter head assembly (13, 52 – 55) B Totalizer and bonnet assembly (1 – 8) C Vertical shaft assembly (12, 14 – 16) D Gearbox (17 – 20) E Miter gear frame assembly (21 – 33) F Propeller assembly (39 – 51) G Separator/support spindle assembly (34 – 38)
Figure 1 . Full meter assembly with call-outs

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Maintenance and Repair

2 .3 Removing the meter head assembly

Refer to Figure 2 and Figure 3.

Remove the meter head assembly (#13) from the service line by removing the meter head bolts (#53) and lifting up the rear (downstream) portion of the meter head (#13).

Carefully pull the assembly back (downstream) and up at the same time to allow the propeller (#40) to clear the inside of the meter saddle and be lifted free.

Inspect the meter head gasket (#52) for any sign of damage and replace if necessary. Replace the meter head assembly (#13) with a dummy cover plate if the service line is to remain in operation.

1. Unbolt the meter head.

Figure 2 . Meter head assembly
2. Lift the assembly up and forward. The propeller may have to be rotated in order to fit through the saddle opening.

3. Tilt the meter assembly forward, allowing the propeller to move through the opening.

4. Completely remove the meter head assembly from the saddle.

Figure 3 . Meter head assembly removal
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Maintenance and Repair

2 .4 Service procedure
The service procedure involves removing, cleaning, and inspecting the meter’s components and assemblies for wear and damage. It is performed in this order:

Section 3.3 3.4
3.4.1 3.4.2 3.4.3 3.4.4 3.5 3.6 3.7

Procedure Meter head assembly removal Routine cleaning and inspection of the assemblies
Totalizer assembly Vertical shaft assembly and gearbox Miter gear frame assembly Propeller assembly Component inspection Meter reassembly Meter head assembly reinstallation

I Inspect all internal meter parts as you proceed. If any meter parts appear to be damaged or excessively worn, replace them to ensure proper meter operation and prevent further damage.

2 .4 .1 Clean and inspect totalizer assembly

Refer to Figure 4 at right.

Totalizer assembly (#4) service procedure should include cleaning and

inspection of the unit noting any excessive wear on the totalizer change gears

(#7 & #8) that may lead to operational problems in the unit.

1. Remove the bonnet mounting screws (#3) and lift the entire totalizer bonnet (#1) off of the meter.

The totalizer assembly (#4) is contained within the totalizer bonnet (#1) and held in place by a base cup (#5). It should not be necessary to remove the totalizer assembly (#4) during inspection. However it is necessary to remove the base cup (#5) to inspect the totalizer change gears (#7 & #8).

2. Remove the base cup (#5) by inserting a small screwdriver into the two cutouts and prying it upward under the edge.

3. Inspect the totalizer change gears (#7 & #8) for any sign of wear.

Both the A-(drive) gear and B-(driven) gear are attached to the lower portion of the totalizer assembly (#4). Spin the floating totalizer driven magnet in the center of the bottom of the totalizer assembly (#4) to make certain it spins freely without bind or drag. The bottom of the totalizer has the letter “A” molded next to the A-drive gear shaft, and the letter “B” next to the B-driven gear shaft.

Figure 4 . Totalizer and bonnet complete assembly

4. Check the totalizer drive magnet assembly (#12) located in the meter head (#13) at the top of the vertical shaft assembly (#14) and make adjustments if necessary.

The totalizer drive magnet assembly (#12) must be positioned 1/16 inch below the top surface of the meter head (#13). Loosen the socket head set screw (#16) in the side of the totalizer drive magnet assembly (#12) and slide it up or down the vertical shaft (#14) as desired. Always be sure the set screw is tightened into the flat on the vertical shaft (#14).

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2 .4 .2 Remove and inspect vertical shaft assembly and gearbox

Refer to Figure 5 at right.

The gearbox (#17) is sealed and

filled with gearbox oil. Before

disassembling the lower meter

assembly, the oil must be drained.

1. Remove two screws (#16) inside the meter head (#13).

2. Pull the vertical shaft assembly (#14) directly out the top of the meter.

3. Turn the meter over onto the meter head (#13) and drain the oil from the gearbox (#17) into a container.

4. Spin the upper bearing assembly (#15) gently, checking for any sign of wear.

5. Inspect the vertical shaft assembly (#14) to be sure it is not bent or damaged.

Maintenance and Repair

Figure 5 . Vertical shaft assembly and gearbox

2 .4 .3 Remove and inspect miter gear frame assembly
Refer to Figure 6 at right.
Remove the miter gear frame assembly (#21) and inspect for wear.
1. Remove four screws (#33) and pull the entire miter gear frame assembly (#21) out of the back of the gearbox (#17).
2. Spin the driven magnet (#24) to make sure the unit runs freely.
3. Inspect the teeth on both the drive miter gear assembly (#26) and the driven miter gear assembly (#27) for any sign of excessive wear.

E
Figure 6 . Miter gear frame assembly

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Maintenance and Repair

If the assembly spins freely and the miter gears are not

miter gear is located or the meter will subtract from

worn, continue to step 2.4.4. No further inspection or

the totalizer.

disassembly of the unit is needed.

5. Remove the drive miter gear assembly (#26) as follows:

If the unit does not spin freely or if the miter gears are worn, disassemble the miter gear frame assembly and replace all worn or damaged parts.
4. Remove the driven miter gear assembly (#27) as follows:

a. Loosen the Allen head set screw on the side of the gear hub.
b. Pull the driven magnet and shaft assembly (#24) out the front of the miter gear frame (#22). Note

a. Loosening the Allen head set screw located on the

any shim washer (#28) that may be positioned

side of the gear hub.

behind the drive miter gear (#26) when removing

b. Push the driven miter gear shaft (#29) out of the

the shaft (#24).

assembly.

6. Inspect the components of the miter gear frame

Note the location of the shim washer (#28), if any, to be sure it is repositioned properly when reassembling the miter gear frame assembly (#21). When reassembling be sure the set screws go into

assembly (#21) as well as the gearbox (#17). Each part should be carefully inspected to determine the origin of any operational problem. Parts that are damaged or worn should be replaced.

recess in the miter gear shafts (#24 & #29), or 7. Clean the parts of the unit and reassemble reversing

damage could result. Be sure the clevis end of the

steps 1 through 6 above.

driven miter gear shaft (#29) is at the same end the

2 .4 .4 Remove and clean propeller assembly

Refer to Figure 7 at right.

Propeller assembly (#39) inspection includes

cleaning the ceramic sleeve bearing (#41),

separator assembly (#34), drive magnet

(#43), and the propeller assembly (#39).

1. Remove the thrust bearing cartridge assembly (#50) as follows:

a. Loosen the set screw (#49) in the side of the nose of the propeller.

b. Remove the thrust bearing cartridge (#50) by turning it counterclockwise while holding the propeller in place.

2. Remove the reverse thrust bearing cartridge (#46) as follows:

a. Turn the propeller (#40) so that the

Allen wrench clearance hole is lined up

with the set screw (#47) in the side of

the reverse thrust bearing cartridge.

The location of the set screw is marked

by a small hole drilled in the face of the

reverse thrust bearing cartridge.

b. With a 5/64 inch Allen wrench, loosen

Figure 7 . Propeller assembly

the set screw (#47) in the reverse thrust

bearing cartridge (#46) two to three turns, which will allow the cartridge to be unscrewed without damaging the

spindle thread.

NOTE: If the bearing area appears to be clogged with dirt or sediment, making it difficult to locate the set screw (#47) or to allow the Allen wrench to fit into the set screw socket, then the bearing area should be flushed out with water.

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Maintenance and Repair

c. Insert tool T-2402X-1 (Figure 8) into the propeller

through the threaded nose. The tabs in the tool

should engage in the screwdriver slot in the end of

the reverse thrust bearing cartridge (#46).

d. Remove the propeller assembly (#39) and reverse

Figure 8 . Tool T-2402X-1

thrust bearing cartridge (#46) by turning tool

material by running a small wire through the holes on

T-2402X-1 counterclockwise unscrewing the

either side of the screwdriver slot.

reverse thrust bearing cartridge (#46) from the separator/support spindle (#35). The propeller assembly with reverse flow cartridge will now slide off the spindle.

Clean the ceramic bearing cartridge (#41) and drive magnet (#43) of any foreign material and inspect for damage.

WARNING: If the reverse thrust cartridge does not unscrew easily, it may be because the set screw was not unscrewed enough. If unscrewing the reverse

a. Using a bottle brush, thoroughly clean the ceramic bearing surface (#41) and the inside diameter of the drive magnet (#43).

flow cartridge is continued with the set screw

b. After cleaning the propeller, flush the inside out with

binding on spindle thread, damage to thread could

water. The outside surfaces of the propeller should

occur.

also be cleaned to assure a smooth, unrestricted

3. Perform water lubrication of the ceramic sleeve (#36) by means of two openings in the end of the thrust bearing cartridge (#50) which allows air to be purged

flow across the surface of the propeller. Do not use an oil-based solvent in cleaning, as damage to the assembly could occur.

from the bearing area. Clear them of any foreign

2 .4 .5 Remove and clean separator/support spindle assembly

Refer to Figure 9 at right.

Clean the separator/support spindle assembly (#34) as follows:

1. Clean the spindle ceramic sleeve (#36) and the O.D. or surface of the separator/ support separator (#35) and inspect for any substantial amount of wear.

2. Check the thrust bearing (#50) for any damage. If it is determined that the spindle ceramic sleeve (#36) or separator (#35) are worn sufficiently, replace the separator/ support spindle assembly (#34). The removal procedure is as follows:

a. Removing the four mounting screws (#37) which thread into the drop pipe.

b. Replace the separator O-ring (#38) and apply a thin coat of silicone grease to it.

c. The separator/support spindle assembly (#34) can then be replaced in the front of the drop pipe (#17) with a firm push, gently rotating the assembly at the same time.
d. Replace and tighten the four mounting screws (#37).

G
Figure 9 . Separator/support spindle assembly

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Maintenance and Repair

2 .4 .6 Reinstall propeller and propeller assembly

Refer to Figure 7 above.

1. Install the propeller as follows:

edge of the propeller when the propeller in pulled

a. The reverse thrust cartridge set screw (#47) should be protruding out of the reverse thrust bearing

forward (away from the drop pipe). The propeller must not contact the drop pipe.

cartridge so it will not bind up on the spindle 2. Inspect the thrust bearing cartridge assembly (#50) in

thread.

the nose of the propeller and replace worn or damaged

NOTE: Look through the end of the propeller and

parts.

hole in the reverse thrust cartridge to be sure the

a. The thrust bearing cartridge (#50) is used to

set screw is not showing.

adjust the amount of longitudinal end play of

b. Slide the propeller assembly onto the support spindle (#18) until the reverse thrust bearing cartridge (#46) contacts the threads on the end of the spindle (#35).
c. Using tool T-2402X-1, thread the reverse thrust bearing cartridge onto the spindle. If you feel any resistance when threading the reverse thrust cartridge on, stop at once and check to be sure the

the propeller assembly on its spindle (#35), which should be about 1/64 inch. End play can be adjusted by turning the thrust bearing cartridge assembly (#50) clockwise until it tightens against the end of the support spindle (#35), then turning thrust bearing cartridge (#50) counterclockwise 1/8 of a turn.
b. Tighten set screw (#49).

set screw is not binding on the thread. Be careful

c. Check the longitudinal end play of the propeller

not to cross-thread the reverse thrust bearing

to insure it is not excessive and does not allow the

cartridge.

propeller (#40) to contact the drop pipe (#17).

d. Thread the reverse thrust bearing cartridge (#46)

d. Check the clearance between the propeller

onto the spindle (#35) until the trailing edge of the

(#40) and drop pipe (#17). The clearance should

propeller contacts the drop pipe (#17).

be approximately .010″ between the drop pipe

e. Set the proper end play by inserting a 5/64″ Allen wrench into the reverse thrust bearing set screw (through the side of the propeller) and loosen

(#17) and trailing edge of the propeller when the propeller in pushed back (toward the drop pipe). The propeller assembly (#39) must spin freely.

the reverse thrust bearing cartridge (#46) 1/2 turn 3. Check the propeller bearing (#41) for excessive radial

counterclockwise.

play by rocking the propeller (#39) gently from side

f. Tighten the set screw in reverse thrust bearing cartridge. There should be approximately .020″ clearance between the drop pipe (#17) and trailing

to side on the spindle (#35). Some play is required for proper operation of the water lubricated ceramic sleeve bearing.

2 .5 Reassembling the meter assembly

Refer to Figure 10 on next page.

Reassembly is necessary at this point. Before reassembling

b. Replace the miter gear frame O-ring (#30) and

any parts, make certain that each is cleaned of any dust or

cover the new O-ring with a thin coat of silicone

dirt and properly lubricated. Cost for replacement parts

grease before replacing the assembly (#21). Make

not covered by warranty are available from current parts

certain that the assembly is installed in a position

and price list. If it is determined that the meter should

such that the drive clevis portion of the driven

be returned for repair, please notify McCrometer prior

miter gear shaft (#29) can accept the driven clevis

to shipment. Each meter must be properly packaged to

portion of the vertical shaft assembly (#14).

prevent damage to the meter in shipment.

c. Secure with four mounting screws (#33).

1. Replace the miter gear frame assembly (#21) in the 2. Fill the gearbox (#17).

back of the gearbox (#17) as follows:

Fill the gearbox (#17) with three ounces of 10w mineral

a. Firmly push the miter gear frame assembly

oil. A small funnel or an oil can with a small nozzle

(#21) into the gearbox (#17), gently rotating the

will make filling the gearbox (#17) easier. Pour the oil

assembly at the same time.

through the opening in the top of the meter head (#13).

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Maintenance and Repair

3. Insert the vertical shaft assembly (#14) as follows.

4. Check the totalizer drive magnet assembly (#12) again

a. Gently insert the vertical shaft assembly (#14) into the gearbox (#17) through the opening in the top

to make certain it is properly set to drive the totalizer (#4). (See section 2.4.1 step 4.)

of the meter head (#13).

5. Place the totalizer base cup (#5) back in the totalizer

b. Rotate the shaft gently until it is engaged in the

bonnet (#1) on the totalizer assembly (#4) after the

driven miter gear shaft (#29) of the miter gear

desiccant capsule and base cup O-ring (#6) are

frame assembly (#21).

replaced. Be the sure O-ring (#6) is on base cup (#5)

properly.

c. Replace and secure two screws (#16) that hold the

upper bearing (#15) in place. Do not overtighten 6. Clean the bonnet assembly (#1) and place it on the

the screws (#16) as this could cock the bearing

meter head (#13).

(#15) and bind the vertical shaft (#14).

The bonnet O-ring (#2) should be replaced and the

d. Turn the top of the vertical shaft (#14) to check for any bind or drag. Should any bind or drag be

new O-ring (#2) covered with a thin coat of silicone grease. Secure with four screws (#3).

apparent, it can usually be corrected by adjusting 7. Dip the propeller assembly (#39) in water to lubricate

the vertical shaft collar and bearing assembly (#15).

the propeller ceramic sleeve bearing (#41) and spin

e. Loosen the set screw (#16) in the side of the assembly (#15) and slide the shaft (#14) downward

the propeller (#40) gently to make certain the meter operates smoothly and no bind or drag is apparent.

until it rests against the driven miter gear shaft 8. Inspect the meter head gasket (#52) for any sign of

(#29), then lift up about 1/64 inch.

damage and replaced if necessary. The meter can now

f. Tighten set screw (#16).

be installed in the service line.

When replacing the meter on the line, make certain

that the top of the welding saddle is smooth and free

of any foreign material. Make certain that no foreign materials are attached to the inside of the service line

pipe, as any flow disturbance or obstruction may affect

the accuracy of the meter.

Figure 10 . Reassembling the meter assembly

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Maintenance and Repair

2 .6 Reinstalling the meter head assembly
See section 1.7. This procedure applies to both new meter head installation and reinstallation of meter head after maintenance. (Figure 11)

1. Set the meter assembly on the saddle as shown with one propeller blade pointing down. The propeller should point opposite the direction of flow.

2. Tilt the meter head assembly forward, allowing the propeller to move through the opening.

3. Slide the assembly forward and down. The 4. Allow the meter head assembly to come to rest

propeller may have to be rotated in order to fit

on the saddle. Install bolts and tighten to proper

through the saddle opening.

torque.

Figure 11 . Meter head installation

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Troubleshooting and Service Schedule

3 .0 TROUBLESHOOTING AND SERVICE SCHEDULE

Meter not reading accurately

Is the flow rate above the minimum required for the
meter?
Yes
Is there a full pipe of water?
Yes
Does the meter have the required upstream and
downstream straight runs of pipe? See table at right Yes
If the meter has an indicatortotalizer, time the totalizer
test hand to confirm flow rate reading on the indicator
Yes

No No
No

Upstream

Meter with Meter without

vanes

Downstream

If all of the above checks out, return the meter to the
factory to be accuracy tested.

Correct the problem

Meter not registering

Is water flowing

No Correct the problem

Yes

Is flow rate above minimum

Correct the problem

required for the meter?

Yes

Remove the totalizer,

indicator-totalizer, or

transmitter.

Is the vertical shaft turning?

Yes

Apply a light finger pressure to the vertical shaft

Yes

Remove the meter from the line.Is debris blocking the propeller?

Yes

Remove debris from the line

Spin the propeller by hand. Does the vertical shaft turn?

Yes

Is the vertical shaft turning now?

Yes

The problem is in the lower portion of the meter. Repair
per manufacturerks instructions or return to
factory for repair.

The problem is in the totalizer, indicator-totalizer, or transmitter, or their connection to the vertical shaft. Repair per manufacturerks instructions or return to factory
for repair

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Ordering Replacement Parts

4 .0 ORDERING REPLACEMENT PARTS
When ordering replacement parts, the meter’s serial number is needed to ensure correct replacements. The serial number can be found on the register canopy lid. The number sequence should look similar to: 18-01234-06. The first two digits are the year of manufacture, the second set of digits is the number of the meter, and the last set of digits is nominal line size. For meters manufactured before 1994, the last sets of digits are reversed. For specific meter part numbers, see the table of part numbers and line drawing on page 4 and page 5.

5 .0 RETURNING A UNIT FOR REPAIR
If the unit needs to be returned to the factory for repair, please do the following:
Prior to calling for a return authorization number, determine the model number, serial number (located inside the front panel of the converter), and reason for return.
· Contact McCrometer Customer Service Department and ask for a Return Authorization (RA) number.
· Telephone: 1-800-220-2279
· Email: customerservice@mccrometer.com
· Ship the meter in the original packaging, if possible. Do not ship manuals, power cords, or other parts with your unit unless required for repair.
· Please make sure the meter is clean and free from foreign debris prior to shipping.
· Write the RA number on the outside of the shipping box. All return shipments should be insured.
· Address all shipments to:
McCrometer, Inc. RA # 3255 W. Stetson Avenue Hemet, CA 92545

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Warranty

WARRANTY

McCrometer warrants that this product will be free from defects in material and workmanship for a period 12 months from the date the equipment was first installed, but in no event longer than 18 months from the date the equipment was first shipped by McCrometer. Repairs shall be warranted for 12 months or, if the repair is performed under this warranty, for the remainder of the original warranty period, whichever is less.
Buyer shall report any claimed defect in writing to McCrometer immediately upon discovery and in any event, within the warranty period. McCrometer shall, at its sole option, repair the equipment or furnish replacement equipment or parts thereof, at the original delivery point.
McCrometer shall not be liable for costs of removal, reinstallation, or gaining access. If Buyer or others repair, replace, or adjust equipment or parts without McCrometer prior written approval, McCrometer is relieved of any further obligation to Buyer under this Article with respect to such equipment.
No equipment furnished by McCrometer shall be deemed to be defective by reason of normal wear and tear, failure to resist erosive or corrosive action of any fluid or gas (unless otherwise specified in Quotations/ Purchase Order Specifications), Buyer’s direct or indirect failure (or the failure of its agents or contractors) to properly store, install, operate, or maintain the equipment in accordance with good industry practices or specific recommendations of McCrometer, or Buyer’s failure to provide complete and accurate information to McCrometer concerning the operational application of the equipment.
THE FOREGOING LIMITED WARRANTIES WITH RESPECT TO EQUIPMENT AND PRODUCTS ARE EXCLUSIVE AND IN LIEU OF ANY AND ALL OTHER WARRANTIES OF QUALITY OR PERFORMANCE, EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION, ANY AND ALL WARRANTIES OF MERCHANTABILITY OR FITNESS OF SAID EQUIPMENT AND PRODUCTS FOR ANY PARTICULAR PURPOSE.
MCCROMETER DISCLAIMS ANY WARRANTY, WHETHER EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF PRODUCTS AND EQUIPMENT SUPPLIED PURSUANT TO ANY PURCHASE ORDER FOR INSTALLATION IN ANY PARTICULAR SYSTEM OF SYSTEMS. MCCROMETER MAKES NO WARRANTY OF ANY KIND WITH RESPECT TO ANY SERVICES PERFORMED BY MCCROMETER OR ITS AGENTS PURSUANT TO ANY QUOTATION.

Purchaser’s sole remedy and manufacturer’s sole obligation for alleged product failure, whether under warranty claim or otherwise, shall be the aforestated obligation of manufacturer to repair or replace products returned within twenty-four months after date of original shipment. The manufacturer shall not be liable for, and the purchaser assumes and agrees to indemnify and save harmless the manufacturer in respect to, any loss or damage that may arise through the use by the purchaser of any of the manufacturer’s products.
McCrometer does not authorize any person or entity (including, without limitation, McCrometer agents and employees) to make any representations (verbal or written) contrary to the terms of this limited warranty or its exclusions. Such terms of this limited warranty and its exclusions can only be effectively modified in writing and only by the President of McCrometer.

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30125-99 Rev. 1.0 | 11OCT2024

McCrometer, Inc. 3255 West Stetson Avenue Hemet, CA 92545 USA Tel: 951-652-6811 800-220-2279 Fax: 951-652-3078 customerservice@mccrometer.com www.mccrometer.com
USA Copyright © McCrometer, Inc. All printed material should not be changed or altered without permission of McCrometer. Any published pricing, technical data, and instructions are subject to change without notice. Contact your McCrometer representative for current pricing, technical data, and instructions.
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30125-99 Rev. 1.0 | 11OCT2024

Documents / Resources

McCROMETER MLE Mainline Flow Meters [pdf] Instruction Manual
MLE, MLF, MLU, TP1, MLE Mainline Flow Meters, MLE, Mainline Flow Meters, Flow Meters, Meters

References

User Manual

MLE Mainline Flow Meters

Product Information

Specifications:

Product Usage Instructions

Installation:

1.0 INSTALLATION

1.1 Uncrating:

1.2 Main Line Flow Meter Installation:

FAQ (Frequently Asked Questions)

Safety Warnings:

Documents / Resources

References

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