HYDRAULIC SYSTEM TMS700E SERVICE MANUAL
2-16 Published 01-29-2015, Control # 512-01
Maintenance
Troubleshooting
Removal
1. Remove the No. 1 pump per instructions in this section.
2. Tag and disconnect the air lines from the disconnect
controls. Cap or plug air lines and ports as needed to
protect against contamination.
3. Tag and disconnect the electrical connector to the air
solenoid valves and the indicator light switch.
4. Disconnect the prop shaft from the pump drive.
5. Remove the hardware securing the support straps to
each side of the pump drive and rear engine mounts.
NOTE: The pump drive with the mounting plate weldments
weighs approximately 70 kg (154 lb).
6. Support the weight of the pump drive and remove the
bolts and hardened washers securing the pump drive
mounting plate to the top and rear of the transmission.
Remove the assembly from the transmission.
7. If installing a new pump drive, remove the pump drive
mounting plate, the pump drive upper support, and the
air shift components (air cylinder, solenoid valves,
linkage).
8. If the pump drive is to be installed on a new
transmission, the bolts that secure the bottom support
weldment on the transmission replace existing bolts in
the transmission.
Installation
1. If the pump drive is to be installed on a new
transmission, remove the bolts mentioned in step 8 of
Removal from the new transmission and install them in
the old transmission.
2. Secure the pump drive to the pump drive mounting plate
with four bolts and hardened washers after applying
medium strength thread locking compound
(Specification 6829012418, Loctite 243) to the bolts’
threads. Secure the pump drive upper support to the
pump drive with four bolts and hardened washers after
applying Loctite 243 to the bolts’ threads. Tighten all
eight bolts; refer to Fasteners and Torque Values, page
1-12 for the torque value for the mounting bolts.
3. Install the air shift components on the pump drive. Refer
to Figure 2-5. For the solenoids, apply medium strength
thread locking compound (Specification 6829012418,
Loctite 243) to the threads of the screws that secure the
solenoids to their mounting bracket. Verify the air
cylinder is pinned securely to the pump drive with a
clevis pin and a cotter pin. Verify the disconnect lever is
connected to the air cylinder’s attached ball joint (upper),
the bracket, and the ball joint (lower) near the lower side
of the pump; verify there are enough 3/8 inch flat
washers at its pivot connection to the bracket to
minimize side play and verify each ball joint can move
freely. Adjust ball joints’ nuts as needed.
Symptom Probable Cause Solution
1. Oil overflow from
the breather.
a. Overfilled. a. Drain to the proper level.
b. The hydraulic pump shaft seal is
leaking oil.
b. Repair the hydraulic pump.
2. Seals leaking. a. Overfilled. a. Drain to the proper level.
b. The hydraulic pump shaft seal is
leaking oil.
b. Repair the hydraulic pump.
3. Vibration. a. Loose drive shaft. a. Tighten the flange bolts (on both
ends).
b. Bad bearings in either the input shaft,
the pinion gear, or the output pinion
gear(s).
b. Inspect and replace as necessary.
c. Engine malfunction. c. Repair as necessary.
d. Bent drive line or worn universals. d. Repair or replace as necessary.
e. Driveline out of balance. e. Balance the drive shaft.
f. Worn gears. f. Replace as necessary.
4. Noise. a. Worn gears or bearings. a. Replace as necessary.
Reference Only
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