Tie Down Master Cylinder Rebuild Kit for Model 660 Actuators User Manual

Master cylinder rebuild kit

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TIE DOWN ENGINEERING • 255 Villanova Drive SW • Atlanta, GA 30336

www.tiedown.com (404) 344-0000 Fax (404) 349-0401

Master Cylinder Rebuild Kit

for Model 660, 700/750 and 800/850 Actuators

Part #70461K and #70462K

061413,C1327

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 “zerc” end of pin/bolt

3/4” or 19mm for jam nuts on the pins/bolts

Rags or old towel to catch brake fluid

Inch pound torque wrench

Permatex 51845 or equivalent

Remove Old Master Cylinder:

1. 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.

2. Remove the “guts” of the actuator from the housing.

a. Remove the front and rear covers, two small bolts each.

b. 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.

c. Remove the bolts that attach the actuator to the trailer tongue.

d. Place the actuator on a flat clean working area to dis-assemble the actuator.

e. Remove the two small bolts holding the safety cable spring clip on the “passenger’’ side of

the actuator housing.

f. Remove the four stainless steel screws on top of the actuator holding the master cylinder in place.

g. Remove the two bolts that have zerc fittings on one end. The kit has new replacement bolts.

h. Slide the coupler/master cylinder assembly out of the housing. The master cylinder uses the

housing as the cover for the reservoir. It may be necessary to “wiggle” the master cylinder to

release it from the housing.

3. Remove the safety cable from the ”L” bracket on the master cylinder.

4. 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.

5. Slide the master cylinder away from the coupler.

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