Brake Cylinder Repair - Yale ERP15-20VT Service Manual

1300 YRM 1330
Figure 12. Removing the Stud
4. Run a thread tap (size M14 x 1.5) into stud hole to
clean and repair any damaged threads.
5. Test threads with a thread plug gauge (size M14 x
1.5 - 6H).
6. If threads are within specification, install new stud
using Stud Installation Tool (refer to section Gen-
eral, Special Tools).
7. Tighten studs to 80 N•m (59 lbf ft). See Figure 13.
Figure 13. Stud Installation
8. Reinstall drive tire and tighten lugs to 170 N•m
(125 lbf ft). Remove truck from blocks.

BRAKE CYLINDER REPAIR

WARNING
Always wear eye protection and use the proper
tools when installing/removing snap rings.
The service brake pedal in the operator compartment
actuates the master cylinder sending pressurized fluid
to the brake pistons in the transaxles through the ser-
vice brake lines.
1. Remove transaxle from lift truck. Remove parking
brake and traction motor from transaxle. See sec-
tion Remove Transaxle From Frame.
2. Drain oil from transaxle.
3. Remove snap ring in brake cylinder. See Figure 14.
1. CYLINDRICAL PIN
2. PISTON SEAL
3. PISTON
4. SPRING
Figure 14. Brake Piston Assembly
CAUTION
Cover the cap with a cloth to control it in case it is
ejected from the piston.
NOTE: Make note of the piston and cap orientation as
well as the orientation of the seal on the piston before
removal.
4. Direct pressurized air into service brake line port in
cover to force cap out of cylinder. Recover spring
from beneath cap. Remove seal from thecap and
cut it in two to prevent accidental reuse. See Fig-
ure 15.
Maintenance and Repair
5. O-RING
6. CAP
7. SNAP RING
11