Milwaukee M12 FUEL ProPEX Expander Operator's Manual

General Power Tool Safety Warnings

Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury. Save all warnings and instructions for future reference. The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

Work Area Safety

• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical Safety

• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
• Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
• Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
• If operating a power tool in a damp location is unavoidable, use a ground fault circuit interrupter (GFCI) protected supply. Use of an GFCI reduces the risk of electric shock.

Personal Safety

• Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
• Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.

Power Tool Use and Care

• Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
• Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
• If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
• Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
• Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
• Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
• Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
• Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
• Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool's operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
• Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
• Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

Battery Tool Use and Care

• Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
• Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
• When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
• Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion or risk of injury.
• Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 265°F (130°C) may cause explosion.
• Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.

Service

• Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
• Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.

Specific Safety Rules for Expansion Tool

• This product is designed to expand PEX-a material. Other materials may split or crack, causing leaking.
• NOTE: It is the responsibility of the installing contractor to determine the compatibility of the tool and fitting system used for the connection. Fittings should be installed per the manufacturer's instructions. Contact the fitting manufacturer for specific information on their system.
• Store tool with expander head installed to protect expander cone from damage.
• Keep fingers away from expander head during use. When expander head contracts, pinching can occur.
• Always use common sense and be cautious when using tools. It is not possible to anticipate every situation that could result in a dangerous outcome. Do not use this tool if you do not understand these operating instructions or you feel the work is beyond your capability; contact Milwaukee Tool or a trained professional for additional information or training.
• Maintain labels and nameplates. These carry important information. If unreadable or missing, contact a MILWAUKEE service facility for a free replacement.
• WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paint; crystalline silica from bricks and cement and other masonry products; and arsenic and chromium from chemically-treated lumber. Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

Specifications

Functional Description

The tool includes the following components:

• 1. Expander cone
• 2. Trigger
• 3. Trigger lock
• 4. LED indicator
• 5. Fuel gauge
• 6. Belt hook
• 7. Expander head

Symbology:

• V: Volts
• DC: Direct Current
• [UL Listing Mark]: UL Listing Mark for Canada and U.S.

Assembly

• WARNING: Recharge only with the specified charger. For specific charging instructions, read the operator's manual supplied with your charger and battery.
• Removing/Inserting the Battery: To remove the battery, push in the release buttons and pull the battery pack away from the tool.
• WARNING: Always remove battery pack before changing or removing accessories.
• To insert the battery, slide the pack into the body of the tool. Make sure it latches securely into place.
• WARNING: Only use accessories specifically recommended for this tool. Others may be hazardous.
• Use only MILWAUKEE M12™ ProPEX® expander heads or Uponor Standard expander heads. The use of incorrectly sized expansion heads may result in faulty connections, which could result in property damage.

Changing Expander Heads

• To remove an expander head, unscrew from tool counterclockwise.
• To install an expander head, screw onto tool clockwise. Hand tighten securely. Do not over tighten. The expander head must fit snuggly against the shoulder of the tool.

Operation

• WARNING: To reduce the risk of injury, always wear proper eye protection marked to comply with ANSI Z87.1.
• Fuel Gauge: To determine the amount of charge left in the battery, turn the tool ON. The Fuel Gauge will light up for 2-3 seconds. When less than 10% of charge is left, 1 light on the fuel gauge will flash 4 times. To signal the end of charge, 1 light on the fuel gauge will flash 8 times and the tool will not run. Charge the battery pack. If the battery becomes too hot, the fuel gauge lights will flash in an alternating pattern and the tool will not run. Allow the battery to cool down.
• Trigger Lock: To lock the trigger, push the trigger lock from the left side of the tool. The trigger will not work while the switch is in the locked position. Lock the trigger when storing the tool and when the tool is not in use. To unlock the trigger, push the trigger lock from the right side of the tool.

Making PEX Tubing Connections

To ensure a proper connection:

• Remove the expander head and remove any dirt and debris.
• Use a clean, lint-free cloth to apply a thin coat of MILWAUKEE Expander Cone Grease, Cat. No. 49-08-2400 to the expander cone. Do not over-lubricate.
• WARNING: Improper lubrication (too much or too little) may result in faulty connections, which could result in property damage.
• Do not expand tubing beyond the tool's capacity (1").
• Pull trigger and verify that the expander head is rotating after each cycle when using MILWAUKEE M12™ ProPEX® expander heads.
• 1. Cut the PEX tubing to the needed length. Use only cutters designed for PEX tubing. Make sure the cut is perpendicular to the length of the tubing.
• 2. Slide the ProPEX® Ring over the end of the tubing until it butts against the ring stop. If the ring does not have a stop, leave an over-hang of no more than 1/16" (approx. 1.6 mm). When using 3/8" ProPEX®, refer to "3/8" ProPEX® Rings" for proper assembly.
• 3. Insert the expander head into the PEX tubing.
• 4. Pull the trigger. The expander head will expand, retract, and rotate slightly in each cycle. NOTE: When Uponor Standard expander heads are used, the head will NOT rotate automatically. Each time the segments contract, gently push the tubing up onto the expander head and rotate 1/8 turn in either direction.
• WARNING: When using Uponor Standard expansion heads, properly rotate the tubing after each expansion to create even, smooth expansion marks. Not rotating the tubing may cause deep grooves and faulty connections, which could result in leaking and property damage.

*Fewer or more expansions may be necessary, as influenced by weather and technique.

• 5. Continue until the tubing and ring are flush with the expander head shoulder.
• 6. Remove the tubing when the segments are contracted and release the trigger. To avoid over-expanding the tubing, do not keep tool in the expanded position with tubing in place.
• 7. Wipe excess grease from inside tubing.
• 8. Slide the tubing over the fitting until it is flush with the fitting shoulder. Connection may be tight. If unable to slide tubing over the fitting, remove from fitting and expand one additional time.
• 9. Tubing should fit tight against the fitting shoulder. If more than 1/16" gap between tubing and shoulder, cut 2" off the end of the tubing and restart procedure with a new ProPEX® Ring.

3/8" ProPEX® Rings

The 3/8" ProPEX® Rings do not fit over 3/8" tubing without expanding the ring separately.

1. Place the ProPEX® Ring on the expander head and pull the trigger to expand the ring once.
2. Remove the ring.
3. Flip the ring over.
4. Place the ring on the expander head and pull the trigger to expand the ring once more.
5. Immediately remove the ring and slide onto the tubing. NOTE: The 3/8" ProPEX® Rings shrink faster than other size rings.
6. Continue with step 3 of "Making PEX Tubing Connections".

Cold-weather Use

Colder weather (<40°F/4°C) requires a longer contraction time and fewer expansions. Do not make ProPEX® connections in temperatures under 5°F (-15°C).

Troubleshooting ProPEX® Connections

If fittings will not seal, check for the following:

• Is the expander head screwed on tightly? Tighten the head securely.
• Are the expander head segments bent or misaligned? Replace expander head.
• Are the expander head segments failing to contract between expansions? Clean and relubricate.
• Is the expander cone over or under lubricated? Clean and relubricate.
• Is the fitting damaged? Replace fitting.
• Is the expander cone bent or damaged? Return to a MILWAUKEE service facility for repair.
• Was the expander head held in the expanded position before tubing was removed? Cut 2" off tubing and restart process.
• Was the tubing rotated slightly after each expansion when using an Uponor Standard expansion head? Cut 2" off tubing and restart process.
• Are the tubing and ProPEX® Ring clean and dry? Wipe dry.
• Is grease getting into the tubing from the expander head? Wipe grease from tubing. Clean and relubricate expander head.

If ProPEX® Ring slides during expansion:

• Are the tubing and ProPEX® Ring clean and dry? Wipe clean.
• Are your hands clean and dry? Wipe dry – oils from your hands can lubricate the tubing and ProPEX® Ring.
• Are you holding the ring in place? Place your thumb against the ring and hold in place during first couple of expansions.

Maintenance

• WARNING: To reduce the risk of injury, always unplug the charger and remove the battery pack from the charger or tool before performing any maintenance. Never disassemble the tool, battery pack or charger. Contact a MILWAUKEE service facility for ALL repairs.
• Maintaining Tool: Keep your tool, battery pack and charger in good repair by adopting a regular maintenance program.
• Each month: Remove the expander head and soak in degreasing agent to remove grease from between expander segments. Wipe expander cone with clean, dry, lint-free cloth. Re-lubricate.
• After six months to one year, depending on use, return the tool, battery pack and charger to a MILWAUKEE service facility for: Lubrication, Mechanical inspection and cleaning (gears, spindles, bearings, housing, etc.), Electrical inspection (battery pack, charger, motor), Testing to assure proper mechanical and electrical operation.
• Inspect your tool for issues such as undue noise, misalignment or binding of moving parts, breakage of parts, or any other condition that may affect the tool operation. Return the tool, battery pack, and charger to a MILWAUKEE service facility for repair.

If the tool does not start or operate at full power with a fully charged battery pack, clean the contacts on the battery pack. If the tool still does not work properly, return the tool, charger and battery pack, to a MILWAUKEE service facility for repairs.

• WARNING: To reduce the risk of personal injury and damage, never immerse your tool, battery pack or charger in liquid or allow a liquid to flow inside them.

Cleaning

Clean dust and debris from vents. Keep handles clean, dry and free of oil or grease. Use only mild soap and a damp cloth to clean, since certain cleaning agents and solvents are harmful to plastics and other insulated parts. Some of these include gasoline, turpentine, lacquer thinner, paint thinner, chlorinated cleaning solvents, ammonia and household detergents containing ammonia. Never use flammable or combustible solvents around tools.

Repairs

For repairs, return the tool, battery pack and charger to the nearest authorized service center.

Accessories

• WARNING: Use only recommended accessories. Others may be hazardous.
• For a complete listing of accessories, go online to www.milwaukeetool.com or contact a distributor.

Service - United States

1-800-SAWDUST (1.800.729.3878)
Monday-Friday, 7:00 AM - 6:30 PM CST
or visit www.milwaukeetool.com

Contact Corporate After Sales Service Technical Support with technical, service/repair, or warranty questions.
Email: metproductsupport@milwaukeetool.com

Become a Heavy Duty Club Member at www.milwaukeetool.com to receive important notifications regarding your tool purchases.

Service - Canada

Milwaukee Tool (Canada) Ltd
1.800.268.4015
Monday-Friday, 7:00 AM - 4:30 PM CST
or visit www.milwaukeetool.ca

Limited Warranty - USA & Canada

Every MILWAUKEE power tool* (see exceptions below) is warranted to the original purchaser only to be free from defects in material and workmanship. Subject to certain exceptions, MILWAUKEE will repair or replace any part on an electric power tool which, after examination, is determined by MILWAUKEE to be defective in material or workmanship for a period of five (5) years** after the date of purchase unless otherwise noted. Return of the power tool to a MILWAUKEE factory Service Center location or MILWAUKEE Authorized Service Station, freight prepaid and insured, is required. A copy of the proof of purchase should be included with the return product. This warranty does not apply to damage that MILWAUKEE determines to be from repairs made or attempted by anyone other than MILWAUKEE authorized personnel, misuse, alterations, abuse, normal wear and tear, lack of maintenance, or accidents.

Normal Wear: Many power tools need periodic parts replacement and service to achieve best performance. This warranty does not cover repair when normal use has exhausted the life of a part including, but not limited to, chucks, brushes, cords, saw shoes, blade clamps, o-rings, seals, bumpers, driver blades, pistons, strikers, lifters, and bumper cover washers.

*This warranty does not cover Air Nailers & Staplers; Airless Paint Sprayer; Cordless Battery Packs; Gasoline Driven Portable Power Generators; Hand Tools; Hoist – Electric, Lever & Hand Chain; M12™ Heated Gear; Reconditioned Product; and Test & Measurement Products. There are separate and distinct warranties available for these products.

**The warranty period for Job Site Radios, M12™ Power Port, M18™ Power Source, Jobsite Fan and Trade Titan™ Industrial Work Carts is one (1) year from the date of purchase. The warranty period for the M18 FUEL™ 1" D-Handle High Torque Impact Wrenches, Drain Cleaning Cables, AIRSNAKE™ Drain Cleaning Air Gun Accessories, and REDLITHIUM™ USB Laser Levels is two (2) years from the date of purchase. The warranty period for the M18™ Compact Heat Gun, 8 Gallon Dust Extractor, M18™ Framing Nailers, M18 FUEL™ 1/2" Ext. Anvil Controlled Torque Impact Wrench w/ ONE-KEY™, M18 FUEL™ 1" High Torque Impact Wrench w/ ONE-KEY™, M18 FUEL™ 2 Gal. Compact Quiet Compressor, and M12™ Laser Levels is three (3) years from the date of purchase. The warranty period for the LED in the LED Work Light and the LED Upgrade Bulb for the Work Light is the lifetime of the product subject to the limitations above. If during normal use the LED or LED Bulb fails, the part will be replaced free of charge. Warranty Registration is not necessary to obtain the applicable warranty on a MILWAUKEE power tool product. The manufacturing date of the product will be used to determine the warranty period if no proof of purchase is provided at the time warranty service is requested.

ACCEPTANCE OF THE EXCLUSIVE REPAIR AND REPLACEMENT REMEDIES DESCRIBED HEREIN IS A CONDITION OF THE CONTRACT FOR THE PURCHASE OF EVERY MILWAUKEE PRODUCT. IF YOU DO NOT AGREE TO THIS CONDITION, YOU SHOULD NOT PURCHASE THE PRODUCT. IN NO EVENT SHALL MILWAUKEE BE LIABLE FOR ANY INCIDENTAL, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES, OR FOR ANY COSTS, ATTORNEY FEES, EXPENSES, LOSSES OR DELAYS ALLEGED TO BE AS A CONSEQUENCE OF ANY DAMAGE TO, FAILURE OF, OR DEFECT IN ANY PRODUCT INCLUDING, BUT NOT LIMITED TO, ANY CLAIMS FOR LOSS OF PROFITS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS WARRANTIES, WRITTEN OR ORAL. TO THE EXTENT PERMITTED BY LAW, MILWAUKEE DISCLAIMS ANY IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE; TO THE EXTENT SUCH DISCLAIMER IS NOT PERMITTED BY LAW, SUCH IMPLIED WARRANTIES ARE LIMITED TO THE DURATION OF THE APPLICABLE EXPRESS WARRANTY AS DESCRIBED ABOVE. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU, THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.

This warranty applies to product sold in the U.S.A. and Canada only. Please consult the 'Service Center Search' in the Parts & Service section of MILWAUKEE's website www.milwaukeetool.com or call 1.800. SAWDUST (1.800.729.3878) to locate your nearest service facility for warranty and non-warranty service on a Milwaukee electric power tool.

Service - Mexico

CENTRO DE ATENCION A CLIENTES
Techtronic Industries Mexico, S.A. de C.V.
Av. Presidente Masarik 29 Piso 7
11560 Polanco V Seccion
Miguel Hidalgo, Distrito Federal, México
01 (800) 030-7777 ο (55) 4160-3540
Lunes a Viernes (9am a 6pm)
O contáctanos en www.milwaukeetool.com.mx

Limited Warranty - Mexico, Central America and Caribbean

The warranty for TECHTRONIC INDUSTRIES is for 5 years from the original purchase date. This warranty card covers any defect in material and workmanship in this Product. To validate this warranty, present this warranty card, closed/stamped by the distributor or the store where you purchased the product, to an Authorized Service Center (ASC). Or, if this card has not been closed/stamped, present the original proof of purchase to the ASC. Call 55 4160-3547 to find the nearest ASC, for service, parts, accessories or components.

Procedure to validate this warranty: Bring the product to the ASC, along with the warranty card closed/stamped by the distributor or the store where you purchased the product, and any defective parts or components will be replaced free of charge. We will cover all freight costs related to this warranty process.

Exceptions: This warranty will not be valid in the following situations:
a) When the product is used differently than indicated in the end-user or instruction manual.
b) When the conditions of use are not normal.
c) When other persons not authorized by TECHTRONIC INDUSTRIES modify or repair the product.
Note: if the cable set is damaged, it must be replaced at an Authorized Service Center to avoid electrical hazards.

SERVICE AND SUPPORT CENTER
Call 55 4160-3547

IMPORTED AND MARKETED BY
TECHTRONIC INDUSTRIES, MEXICO, S.A. DE C.V.
Miguel de Cervantes Saavedra No.301 Piso 5, Torre Norte
11520 Colonia Ampliación Granada
Miguel Hidalgo, Ciudad de Mexico, Mexico

Model:

Date of Purchase:

Distributor Seal:

Service Parts List

BULLETIN NO. 54-47-0310

SPECIFY CATALOG NO. AND SERIAL NO. WHEN ORDERING PARTS

M12™ FUEL™ PEX Expander

CATALOG NO. 2532-20

SERIAL NO. K97A

REVISED BULLETIN DATE Nov. 2020

WIRING INSTRUCTION SEE PAGE 3

EXAMPLE: Component Parts (Small #) Are Included When Ordering The Assembly (Large #).

To remove an Expander Head, unscrew from tool in a counter-clockwise direction.

Be sure Expander Head is free of any dirt and debris.

Use a clean, lint-free cloth to apply a thin coat of Milwaukee Expander Cone Grease, No. 49-08-2400 to the cone of the Spindle (37). Do not over-lubricate.

See page 3 for additional lubrication notes.

Reinstall Expander Head onto tool in a clockwise direction. Hand tighten securely. Do not over tighten. The Expander Head must fit snuggly against the shoulder of tool.

Lubrication Notes

Type 'J' Grease, No. 49-08-4220 (1 lb. can): When servicing, remove 90-95% of the existing grease prior to installing Type 'J'. Original grease may be similar in color but not compatible with 'J'. Prior to reinstalling, clean gear assemblies with a clean, dry cloth. Lightly coat all individual parts highlighted here with grease. Apply a greater amount of grease to all internal and external gear teeth.

Type 'L' Grease, No. 49-08-4175 (1 lb. can): When servicing, remove 90-95% of the existing grease prior to installing Type 'L'. Original grease may be similar in color but not compatible with 'L'.

Milwaukee Expander Cone Grease, No. 49-08-2400: Use a clean, lint-free cloth to apply a thin coat of Milwaukee Expander Cone Grease, No. 49-08-2400 to the cone of the Spindle (37). Do not over-lubricate.

Grease Application:

• 2 grams 'L' grease
• 2 grams 'L' grease
• 2 grams 'L' grease at each location
• 2 grams 'L' grease at six locations (12 grams total)

Screw Torque Specifications

NOTE: Be sure to place all components of the Electronics Assembly (64) firmly and squarely in Left Housing Halve-Support (55). Be sure to route wires into wire traps as shown. Check for any interferences prior to installing the Housing Cover (51).