JLG G6-42A Service Manual - Manual (Page 107)

6-5 G6-42A, G9-43A, G10-43A
Transmission
12. Remove the hydraulic pump. Refer to Section 8.6.1,
“Implement Pump Replacement.”
13. Label and disconnect the transmission temperature
switch connector and shift solenoid wiring harness
connectors.
14. Label, disconnect and cap the transmission oil
cooler inlet and outlet hoses at the transmission. The
transmission oil cooler outlet hose, routed to the
lower radiator fitting, is located on the top of the
transmission. The transmission oil cooler inlet hose,
routed to the upper radiator fitting, is located on top
of the transmission.
15. Remove the access plug from the engine bell
housing. This will allow access to remove the bolts
holding the flex plate to the engine flywheel.
16. Turn the engine over slowly by hand and align each
of the flex plate bolts to be accessed. Remove them
one at a time.
17. Wipe up any spilled hydraulic and transmission oil.
18. Connect a lifting strap or chain to the lifting eye at
the top of the transmission, and to a suitable hoist or
overhead crane. Operate the hoist or crane to
remove slack from the chain, but DO NOT raise the
transmission at this time.
19. Place blocks under rear of engine for support
BEFORE transmission mounts are removed.
20. Place blocks under the transmission to help support
it during removal.
21. Remove both rear transmission mount bolts and
lockwashers securing the transmission mount to the
frame.
22. Remove the bolts and washers holding the
transmission to the engine.
23. Remove the capscrews and lockwashers securing
each rear transmission mount to the transmission.
24. Remove the transmission mounts from the machine.
25. Inspect the rubber mounts. Replace the mounts if
damaged.
26. Carefully remove the transmission from the
machine. Avoid causing damage to the transmission
or surrounding parts.
27. Lift the transmission clear of the machine, and lower
it onto suitable supports or secure it to a stand built
especially for transmission or engine service. Secure
the transmission so that it will not move or fall.
28. Remove any external transmission components as
required, including the transmission temperature
switch, and inlet and outlet cooler hose fittings.
Cover all transmission openings.
29. Remove the transmission oil filter and dispose of
properly. Clean the filter mounting surface. Cover or
cap the oil filter mount.
30. If transmission oil is suspect to contamination or
torque converter is damaged, remove the converter
and flex plate from the transmission.
31. Remove the bolt and washers holding the converter
to the flex plate.
6.4.2 Transmission Inspection and Internal
Repair
If replacing the entire transmission, transfer the
transmission temperature switch to the replacement
transmission. The gear shift solenoids are included with a
new transmission.
6.4.3 Transmission Installation
1. Install both rear transmission mounts on the
transmission. Torque capscrews to 66 lb-ft (89 Nm).
2. Install two guide studs near the top of the bell
housing holes.
3. Use a hoist or overhead crane and sling attached to
the lifting eye at the top of the transmission. Raise
and position the transmission within the chassis.
4. Align the torque converter, align the transmission
bolt holes with the two studs in the bell housing.
Install the eight bolts and washers and torque to
53 lb-ft (72 Nm). Remove the two alignment studs
and install and torque the last two transmission
mounting bolts.
5. Install the two rear transmission mounting bolts on
the frame with two capscrews and two lockwashers.
Apply Loctite
® 242™ to the transmission mount bolts and
torque to 220 lb-ft (298 Nm).
6. Turn the engine over slowly by hand and align each
flex plate bolts to be accessed. Install them one at a
time. Torque to 26-29 lb-ft (35-39 Nm). Replace
access plug.
7. Remove the hoist or overhead crane and sling.
8. Connect the transmission temperature switch
connector and shift solenoid wiring harness
connectors.
9. Secure the wiring harness to the transmission
housing.