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NHTSA ID Number: 10159471
Manufacturer Communication Number: 059-Z01-16
Summary
Master Cylinder Kit for LP70 Button Latch Low Profile Actuators Installation Instructions
1 Affected Product
INSTALLATION INSTRUCTIONS
Master Cylinder Kit for LP70 Button Latch Low Profile Actuators
Part Number 47267K Disc & 47271K Drum
Tools Required
- Wheel chocks to keep trailer from moving
- Jack stand to elevate trailer tongue
- 3mm or 1/8” hex wrench for top four (4) screws
- 10mm wrench for dampener rod
- 14mm wrench for dampener rod lock nut
- 9/16” for “zerk” end of pin/bolt
- ¾” or 19mm for jam nuts on the pins/bolts
- Rags or old towel to catch brake fluid
- Inch pound torque wrench
- Secure the trailer on a level spot. Block the wheels and elevate the trailer tongue to be able to work on the actuator. Use old towels or rags under the actuator to catch brake fluid that might spill,
- Remove the “guts” of the actuator from the housing. Remove the plastic cap on the housing. Remove the four stainless steel screws holding the master cylinder in place. Remove the two bolts that have zerk fittings on one end. The kit has new replacement bolts. Slide the coupler/master cylinder assembly out of the housing. Remove the brake line from the rear of the master cylinder. Elevate the end of the hose to keep brake fluid from draining out of the brake lines.
- Using a 10mm wrench for the rod, and a 14mm wrench for the nut, remove the lock nut holding the dampener rod to the coupler housing.
- Slide the master cylinder away from the coupler. Remove the emergency stop cable from the “L” bracket.
Installing New Master Cylinder
- Now would be a good time to clean the coupler and the actuator housing of road grime and dirt.
- Your kit contains parts to replace the rollers, plastic wear cuff, pins/bolts and the top SS screws. Do not reuse old parts where new parts are available in the kit.
- If your old master cylinder has a disc brake solenoid you need to remove and reinstall on your new master cylinder. The new master cylinder kit has the replacement brass fitting for the master cylinder, rubber hose and hose clips to make this easier.
- Insert the new rollers into the coupler body. This must be done before reassembly of the master cylinder to the coupler.
- Reconnect the emergency cable to the “L” bracket and wrap the steel cable around Hose, hose clamps & brass fitting is the master cylinder at the top.
- Place one ½” flat washer on the dampener rod. Slide the master cylinder into the coupler so that the dampener rod goes into the hole in the plate. Place another flat washer on the dampener rod. While holding the dampener rod with a 10mm wrench, add the lock nut and turn the loc nut with a 14mm wrench until the rod is tight to the coupler plate.
- FOR DISC BRAKE MODELS ONLY, remove the brass plug at the rear of the new master cylinder and replace with the supplied “barbed” fitting. Remove the solenoid from the old master cylinder and re-install in the new master cylinder. New hose and clamps are provided in the repair kit.
- Install the new white plastic cuff on the coupler. The cuff will snap in place with the two top holes.
- Slide the “new” assembly back into the housing.
- Insert the new pins/bolts with the zerks lining up the rollers with the holes in the housing. Place a new bushing on the pin and place threw the housing, into the roller and out the other side of the Place a new bushing on the end of the pin. Loosely attach a jam nut to both pins at this time.
- Line up the master cylinder so that you can re-install the top four (4) SS screws into the master cylinder top plate. Use a Loc-Tite or similar coating to insure the screws stay in place. Torque to 150 INCH lbs (not foot lbs, 150 INCH lbs is 12.5 foot lbs).
- Tighten the jam nuts on the pins to a “just snug” position. Pins must be able to rotate.
- Re-install housing on trailer tongue if required.
- Re-install brake line to master cylinder.
- Bleed brakes using instructions from brakes or actuator.
059-Z01-16 05.2019 | 08169
059-Z01-16
https://www.nhtsa.gov/recalls?nhtsaId=10159471
https://static.nhtsa.gov/odi/tsbs/2019/MC-10159471-0001.pdf
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