Introduction
The JOHNSON Midget Model 10 Loader is a versatile attachment designed for a wide range of loading and unloading tasks in various environments. It is ideal for poultry houses, hog pens, calf pens, motels, parking lots, fertilizer plants, landscaping, greenhouses, nurseries, roofing contractors, and any areas where space is limited.
The loader is built with rugged all-box construction and features powerful double-acting cylinders. Models shown are equipped with hydraulic bucket control or mechanical trip.
Available Models/Configurations:
- 1620-H: 30" Material Bucket
- 162S-H: 30" Tine Bucket
- 162S-H Tine Bucket with 1640 - 48" Bucket Adapter
- 162S-H Tine Bucket with 1626 - 30" Bucket Adapter
- 1621: 4 FT. LIGHT MATERIAL BUCKET
- 163S-H: Boom
The loader is designed to be a "Work Horse" for efficient operation.
Specifications
General Specifications:
- Total weight (as shown): 350 lbs.
- Bucket Capacity: 300 lbs.
- Reservoir: 4 qt., with filter screen.
- Time of lift: 5 seconds.
- Counter weight: Required.
- Hydraulic valve: 2-way.
- Hydraulic pump: 600 p.s.i.
- Cylinders: Double acting.
- Unit construction: Box construction.
Clearance and Reach Dimensions:
- A: 46 1/2" clearance under bucket fully dumped.
- B: 57" clearance under fully raised bucket.
- C: 62 1/2" height to pivot fully raised.
- D: 22" reach with bucket fully dumped.
- E: 14" clearance from grille to bucket.
- F: 18" reach from axle to bucket.
- G: 47° dumping angle.
Warranty
JOHNSON Hydraulic Equipment Co. warrants all new products of its own manufacture to be free from defects in material and workmanship for a period of 90 days. Component parts not of JOHNSON manufacture are covered by the guarantees of their respective manufacturers.
JOHNSON will replace, free of charge, f.o.b. distributor's or customer's warehouse, any parts covered by this warranty which are returned to the factory (transportation charges prepaid) within 90 days after delivery to the original user, should inspection show such parts to be defective in workmanship or material.
This warranty does not apply to products that have been repaired or altered prior to factory inspection, or subjected to abuse, negligence, or accident. It also does not apply to products used in applications for which they were not designed or intended.
Keep this manual handy for ready reference. For parts and major service, consult your authorized Tractor dealer. He has trained servicemen as well as genuine service parts and the necessary tools and equipment to handle all your needs.
Right-hand (R.H.) and Left-hand (L.H.) references are determined by standing at the rear of the tractor or loader and facing the direction of travel.
Contents
- Operation: Page 3
- Service: Page 4
- Assembly: Pages 5-10
- Parts List: Pages 5-10
- Attachments: Page 12
Operation
- Check Oil Level: Periodically ensure the oil level is not more than 8 inches below the top of the tank. Use only lightweight anti-foam and anti-sludge hydraulic oil for best performance.
- Start-up: Start the tractor and operate the loader, extending all cylinders to remove air. Always run the engine at least at half speed while operating the loader. Operating at very low engine speeds can cause the hydraulic pump to not displace oil fast enough, leading to oil being forced out of the breather.
- Control Operation:
- To RAISE the loader, pull the control lever towards you as far as it will go. The lever returns to Neutral when released.
- To LOWER the loader, push the lever forward.
- Troubleshooting:
- If the loader does not reach maximum height, a shortage of oil is indicated. Check hydraulic oil level.
- Operate the loader several times, and with all cylinders collapsed, check and maintain the correct oil level.
- For smooth performance, ensure the pump is running whenever the loader is operated. If the loader is left in a raised position, start the pump before lowering. Dropping the loader with a "dead pump" can fill oil lines with air, causing jerky operation and oil expulsion from the breather.
- Ballast Requirements: For stability, use two sets of rear wheel weights with 150 lbs. in the ballast box, or one set of rear wheel weights with 270 lbs. in the ballast box.
- Tire Inflation: For maximum tire service, front tires should be inflated to a minimum of 35 p.s.i. (Tire manufacturers recommend 4-ply rating at 70 p.s.i. for commercial type operation.)
Important Safety Reminders:
- Do not operate the loader unless the hydraulic pump is running.
- Ballast tractor rear wheels for stability.
- Lift loads, engage the tractor clutch, and accelerate with care.
- In transport, carry the working unit low.
- Before servicing or adjusting equipment:
- Lower the working unit to the ground (Bucket with springs should not be in tripped position).
- Disengage power and shut off the engine.
- Relieve hydraulic pressure before disconnecting oil lines.
Service
Bolts
Periodically check mounting bolts for maximum loader life. Loose bolts from constant operation can cause excessive wear.
Belt
When belt slippage is first noticed, tighten the belt immediately to prevent excessive wear. Loosen the cap screw on the bracket and move the pump back until a 10-pound pressure midway between the sheaves deflects the belt 1/8 inch. Tighten the cap screw to hold the pump in position.
Screen
After several hours of operation, remove the plug from the bottom of the right upright and drain oil from the reservoir. Disconnect the low-pressure hose from the elbow on the right upright and remove the screen from the tank. Flush and clean the tank and screen. Reassemble. The screen should be removed periodically for cleaning. A clogged screen can cause pump cavitation and rapid pump wear.
Cylinders
Cylinder service typically involves replacing O-Rings and packing to fix leaks. If disassembly reveals defective follower cups, wipers, scored pistons, or barrels, replace these parts.
To replace rings and packing:
- Remove the four stuffing box screws and lockwashers or snap ring from the cylinder.
- Slide the piston rod and attached parts out of the cylinder barrel.
- Remove the lock nut from the end of the piston rod.
- Slide components off the piston rod.
- Replace defective rings, packing, and cylinder cups.
- Assemble the cylinder in reverse order of disassembly, taking care not to damage parts.
CAUTION: DO NOT EXERT EXCESSIVE PRESSURE ON THE CAP-TO-STUFFING BOX CAP SCREWS.
Pump and Valve
If trouble indicates pump or valve failure, do not attempt repairs. Return the unit to the factory for inspection and servicing. Pump and valve pressures are preset by the manufacturer and should not be tampered with, as they are set according to tractor manufacturer recommendations.
Parts Lists
Note: Right-hand (R.H.) and Left-hand (L.H.) references are determined by standing at the rear of the tractor or loader and facing the direction of travel.
Lift Frame Assembly (Pages 5-10)
Diagram 1: Lift Frame Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1601 | 1 | Lift Frame |
| 2 | 4 NF 4 | 4 | y,j" Coupling |
| 3 | 1601-12 | 1 | Lift Frame Pipe y,j x II" |
| 4 | 4 GA | 1 | Rayon Hose y,j" |
| 5 | 4 GH | 4 | Male Adaptor y,j" |
| 6 | 4 NC 3 | 4 | St. Ell y,j" |
| 7 | 4 ND 1 | 2 | y,j" Tee |
| 8 | 1601-13 | 2 | Lift Frame Oil Line |
| 9 | 4 NC 1 | 2 | W' x 90 Ell |
| 10 | 0062 | 3 | Yz x 2Yz" Attachment Pin |
| 11 | 1606 | 2 | Lift Cylinder |
| 12 | 0061 | 2 | Yz x 2" Cylinder Pin |
| 13 | 1606-20 | 2 | Cylinder Pipe lis x 1" |
| 14 | 100 LD 20 | 8 | Cotter Pin |
| 15 | 12 GP 12 | 2 | 12" Universal Pipe Clamp |
| 16 | 0064 | 1 | Yz x 3y,j" Pin |
Diagram 2: Mechanical Trip Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1601-15 | 1 | Pin (Trip) |
| 2 | 6 M 28 | 2 | Capscrew % x 11-1" |
| 3 | 1601-10 | 1 | Trip Lever |
| 4 | 6 M 80 | 2 | Capscrew % x 5" |
| 5 | 1601-19 | 1 | Trip Spring |
| 6 | 1601-11 | 1 | Spring Cap |
| 7 | 0059 | 1 | Cable |
| 8 | 4L 3 | 1 | Cable Thimble |
| 9 | 5L 3 | 2 | Cable Clip |
| 10 | 1601-20 | 2 | Elbow Lever |
| 11 | 5 LO 3 | 1 | Cable Clamp |
| 12 | 1601-18 | 1 | Return Spring |
| 13 | 1601-17 | 1 | Trip Handle |
| 14 | 1601-17 A | 1 | Spacer |
| 15 | 4 MF 24 | 1 | Machine Bolt l4 x 1Yz" |
| 16 | 4 MK 2 | 6 | Flatwasher l4" |
| 17 | 6 MJ 1 | 2 | Nut %" |
| 18 | 6 MK 1 | 1 | Lockwasher %" |
Diagram 3: Tilt Linkage Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1608-1 | 1 | Link Mounting |
| 2 | 1608-2 L | 1 | Link, Left Hand |
| 3 | 1608-3 | 1 | Lever |
| 4 | 1607 | 1 | Tilt Cylinder |
| 5 | 12 MF 88 | 1 | Machine Bolt X x 5Y}" |
| 6 | 6 MF 80 | 2 | Machine Bolt % x 5" |
| 7 | 12 MK 1 | 1 | Lockwasher X" |
| 8 | 6 MK 1 | 2 | Lockwasher %" |
| 9 | 1608-4 | 3 | Link Pin |
| 10 | 1608-5 | 1 | Cylinder Base Pin |
| 11 | 1608-6 | 1 | Cylinder Head Pin |
| 12 | 150 LD 25 | 3 | Cotter Pin |
| 13 | 150 LD 30 | 2 | Cotter Pin |
| 14 | 1608-2 R | 1 | Link, Right Hand |
Diagram 4: Upright Components
| Ref. No. | Part No. | Name of Part | |
|---|---|---|---|
| 1 | 1670 R | 1 | Right Hand Upright |
| 2 | 1043 | 1 | Screen |
| 3 | 4 NA 2 | 2 | Pipe Plug W' |
| 4 | 568699 | 1 | Breather |
| 5 | 1670 L | 1 | Left Hand Upright |
Diagram 5: Cylinder Components (Likely Tilt Cylinder)
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1607-1 | 1 | Tube |
| 2 | 1607-2 | 1 | Rod |
| 3 | 18 MJ 3 | 1 | Lock Nut |
| 4 | HJ 114 A | 2 | lis" Follower Plate |
| 5 | 250 A 22 | 1 | Cylinder Cup |
| 6 | HJ 123 | 1 | Piston |
| 7 | 112 EA 14 | 2 | o Ring |
| 8 | 250 EA 36 | 1 | o Ring |
| 9 | 250 F 36 | 1 | Teflon Backup Washer |
| 10 | HJ 137 B | 1 | Cylinder Head |
| 11 | 150 EA 20 | 1 | o Ring |
| 12 | 150 F 24 | 1 | Leather Backup Washer |
| 13 | 162 C 18 | 1 | Wiper |
| 14 | 6 M | 1 | Snap Ring |
Diagram 6: Hydraulic Valve and Piping Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 20 JA 44 S | 1 | SP 4-4 Valve |
| 2 | 4 NE 8 | 2 | Bushing Yz x J4" |
| 3 | 4 GH 4 | 4 | Male Adapter J4/1 |
| 4 | 4 GA 16 | 4 | Hose J4 x 16/1 |
| 5 | 4 NF 4 | 2 | Coupling J4" |
| 6 | 1608-12 | 2 | Pipe |
| 7 | 4 NC 1 | 1 | Ell J4/1 x 900 |
| 8 | 1607 | 2 | Tilt Cylinder |
| 9 | 12 GP 14 | 3 | Pipe Strap |
| 10 | 6 MF 40 | 3 | % x 2 Yz" Machine Bolt |
| 11 | 6 MK 1 | 3 | %/1 Lockwasher |
Diagram 7: Cylinder Components (Likely Lift Cylinder)
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1606-1 A | 1 | Cylinder Tube |
| 2 | 1606-2 | 1 | Piston Rod |
| 3 | 18 MJ 3 | 1 | 1/1 NF Nut |
| 4 | HJ 147 | 2 | Follower Plate |
| 5 | 200 A 20 | 1 | Cylinder Cup |
| 6 | HJ 146 | 1 | Piston |
| 7 | 125 EA 16 | 1 | o Ring |
| 8 | 200 EA 28 | 1 | o Ring |
| 9 | 200 FA 28 | 1 | Teflon Backup Washer |
| 10 | HJ 145 | 1 | Cylinder Head |
| 11 | 137 EA 18 | 1 | o Ring |
| 12 | 137 F 18 | 1 | Leather Backup Washer |
| 13 | 162 C 18 | 1 | Wiper |
| 14 | 6 MK 1 | 4 | %" Lockwasher |
| 15 | 6M 8 | 4 | % x Yz" Capscrew |
| 16 | 200 LD 30 | 1 | 3/16 X 2" Cotter Pin |
Diagram 8: Hydraulic Kit - Mechanical Trip Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 16 J 4S | 1 | Valve |
| 2 | 4 GA 16 | 2 | Hose y,; x 16" |
| 3 | 6 N 32 | 2 | Tapered Nipple %" |
| 4 | 10 G 6 | 1 | L PHose Ys x 6" |
| 5 | 6 NC 3 | 2 | St. Ell %" |
| 6 | 8N 1 | 1 | Close Nipple Yz" |
| 7 | 8 NC 2 | 2 | Ell Yz x 45 |
| 8 | 8 N 32 | 1 | Tapered Nipple Yz" |
| 9 | 12 G 8Yz | 2 | L PHose % x 8Yz" |
| 10 | 12 GT 1 | 1 | Hose Clamp %" |
| 11 | 6 GH 6 | 2 | Male Adapter %" |
| 12 | 6 GA 12 | 1 | Hose % x 12" |
| 13 | 1614 P 761 S | 1 | Special Fitting |
| 14 | 4 MD 5 | 1 | Pump |
| 15 | 2L 8 | 1 | Set Screw y,; x 5/16" |
| 16 | 2400 | 1 | Woodruff Key Ys x Yz" |
| 17 | 6 MK 2 | 1 | Pulley |
| 18 | 5 MK 1 | 2 | Flatwasher %" |
| 19 | 5 MA 20 | 2 | Lockwasher 5/16" |
| 20 | A-26 | 1 | Capscrew 5/16 xl y,;" |
| 21 | 6 M 12 | 1 | V-Belt |
| 22 | 6 MK 1 | 2 | Capscrew % x %" |
| 23 | 8 NE 12 | 2 | Lock washer %" |
| 24 | 1 | Bushing Yz x %" |
Diagram 9: Mountings and Ballast Box Components
| Ref. No. | Part No. | No. Req. | Name of Part |
|---|---|---|---|
| 1 | 1695 | 1 | Front Mounting |
| 2 | 6 MK 1 | 14 | Lock washer %" |
| 3 | 6 M 48 | 2 | Capscrew % x 3/1 |
| 4 | 1697 | 1 | Pump Mounting |
| 5 | 5 M 20 | 2 | Capscrew 5/16x 1Y4" |
| 6 | 5 MK 1 | 2 | Lockwasher 5/16/1 |
| 7 | 6 MF 20 | 8 | Machine Bolt % x 1Y4" |
| 8 | 6 MD 20 | 1 | Set Screw % x 1Y4/1 |
| 9 | 1696 | 1 | Rear Mounting |
| 10 | 6 M 56 | 1 | Machine Bolt % x 3 Yz" |
| 11 | 10 MF 32 | 2 | Machine Bolt Ys x 2" |
| 12 | 10 MK 1 | 2 | Lockwasher Ys /I |
| 13 | 1698-1 | 1 | Tie Strap |
| 14 | 1698 | 2 | Ballast Box |
| 15 | 6 MK 2 | 2 | Flatwasher %/1 |
P-761S Hydraulic Pump
Details on the P-761S Hydraulic Pump and its components:
| Part No. | Name of Part |
|---|---|
| 353 | Woodruff Key |
| 727 | Valve Assembly |
| 728 | Body, Bushing, Venturi Assembly (2) |
| 731 | Dowel Shaft |
| 733 | Spring, Flow Control Valve |
| 734 | Cap, Valve |
| 735 | 0 Ring, 1-1/16 OD x lis S |
| 736 | Seal (body to cover) |
| 737 | Retaining Ring |
| 738 | Pin, Drive |
| 740 | Pin, Dowel, Cam (3) |
| 741 | Stud, Special |
| 756 | Gasket, Reservoir Intake |
| 757 | Kit, Cam, Insert, Roll, Carrier (2) |
| 758 | Screw, Hex %-16 NC x 2 |
| 821 | Screw %-16 NF xl |
| 14126 | o Ring 11/16 OD x 1/16 S |
| 15203 | Seat and Ball Assembly |
| 20733 | Seat, Tube |
| 20724 S | Seal, Oil (shaft) |
| 20834 | Flange |
| 20925 S | Flange |
(One each item per assembly except as noted)
Loader Attachments
Various attachments are available to expand the utility of the JOHNSON Midget Model 10 Loader:
- 1620 Dirt Bucket: A standard bucket for general material handling.
- 1625 Manure Bucket: Designed for handling manure and other loose materials.
- 1626 Dirt Plate: An adapter or extension for the bucket.
- 1640 Bucket Adapter: Allows for use with a 48" bucket.
- 1619-20 / 1619-25 Trip Block: Components related to the bucket tripping mechanism.
- 1625-6 Tine: Tines for a tine bucket configuration.
- 1635 Boom: A specialized attachment.
Attachment Descriptions (with typical hardware):
- 1620 DIRT BUCKET: Often secured with 3/8 X 1 MACH BOLT LW FW (4) and 1/2 x 1-1/2 "ACH BOLT LV rw (2).
- 1625 MANURE BUCKET: Similar mounting hardware.
- 1626 DIRT PLATE: Attaches to buckets, secured with 3/8 X 1 MACH BOLT LW FW (4).
- 1640 BUCKET ADAPTOR: Connects to the loader, typically using 1/2 x 1-1/2 MACH BOLT LW (2).
- 1635 BOOM: A specialized attachment.
