First and Reverse Brake (B-3)

First and Reverse Brake (B-3)





Disassembled View

Disassembly





1. Remove assembled thrust bearing and race from transmission case.





2. Check first and reverse brake piston movement.
Make sure that first and reverse brake piston moves smoothly when applying and releasing the compressed air into the transmission case.





3. Set special tool on the spring retainer, and compress the return spring.
Spring compressor: J-25048
Remove the snap ring with snap ring pliers.
4. Remove the piston return spring.





5. Remove the first and reverse brake piston No.2.
Holding the first and reverse brake piston No.2 by hand, apply compressed air to the transmission case to remove the first and reverse brake piston No.2.
Remove the first and reverse brake piston No.2.
If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.
6. Remove the O-ring from first and reverse brake piston No.2.





7. Remove the reaction sleeve.
Insert special tool behind the reaction sleeve and gradually lift it out of the transmission case.
Reaction sleeve puller: J-37236
8. Remove the O-ring from reaction sleeve.





9. Remove the first and reverse brake piston No.1.
Insert special tool behind the first and reverse brake piston No.1 and gradually lift it out of the transmission case.
Piston puller: J-37237
10. Remove the O-rings from first and reverse brake piston No.1.

Reassembly
1. Coat three new O-rings with ATF.
2. Install the two O-rings on the No.1 piston.





3. Install the O-ring on the reaction sleeve.
Install the first and reverse brake piston No.1 to the reaction sleeve.
4. Coat a new O-ring with ATF and install it on the first and reverse brake piston No.2.





5. Install the first and reverse brake piston No.1 with reaction sleeve onto the first and reverse brake piston No.2.





6. Align the teeth of the first and reverse brake piston No.2 into the proper grooves.
Being careful not to damage the O-rings, press in the first and reverse brake piston No.2 with No.1 into the transmission case.





7. Place piston return spring onto first and reverse brake piston No.2.





8. Set special tool as shown, and compress the return spring with special tool.
Spring compressor: J-25048
Install the snap ring with snap ring pliers.
Be sure the end gap of the snap ring is not aligned with the spring retainer claw.





9. Check first and reverse brake piston movement.
Make sure the first and reverse brake piston moves smoothly when applying and releasing the compressed air into the transmission case.





10. Coat the assembled bearing and race with petroleum jelly.
Install the assembled bearing and race facing the bearing side upward.





Bearing and race diameter (Reference)