JLG G12-55A Service Manual - Manual (Page 97)

6-5 G10-55A, G12-55A
Transmission
27. Remove the transmission oil filter (4) and dispose of
properly. Clean the filter mounting surface. Cover or
cap the oil filter mount.
28. If transmission oil is suspect to contamination or
torque converter is damaged, remove the converter
and flex plate from the transmission.
29. Remove the bolt and washers holding the converter
to the flex plate.
6.4.2 Transmission Inspection and
Internal Repair
If replacing entire transmission, transfer transmission
temperature switch to replacement transmission. Gear
shift solenoids are included with a new transmission.
6.4.3 Transmission Installation
1. Install two guide studs near the top of the bell
housing holes.
2. 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.
3. 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.
4. Install capscrews and lockwashers securing rear
transmission mount to transmission. Torque
capscrews to 125-140 lb-ft (170-190 Nm).
5. Install the two rear transmission mounting bolts on
the frame with two capscrews and two lockwashers.
Apply Loctite
® 24™ to the transmission mount bolts and
torque to 125-140 lb-ft (169-190 Nm)
6. Turn the engine over slowly by hand and align each
of the four torque convertor diaphragm bolts through
the access plug in the bell housing. Install them one
at a time. DO NOT fully tighten until all of the
capscrews and locknuts are in place. Torque to
26-39 lb-ft (35-59 Nm). Replace access plug.
7. Remove the hoist or overhead crane and sling.
8. Connect the transmission temperature switch
connector and the shift solenoid wiring
harness connectors.
9. Secure wiring harness to transmission housing.
10. Connect the transmission oil cooler inlet and outlet
hoses at the transmission.
11. Install the hydraulic pump. Refer to Section 8.6.1,
“Implement Pump Replacement.”
12. Install the transmission-to-axle drive shafts. Refer to
Section 5.5.5, “Drive Shaft Installation.”
13. Install exhaust components from turbo to exhaust
pipe. Refer to Section 7.5, “Engine Exhaust System.”
14. Clean the transmission oil filter mounting surface.
15. Apply a thin film of clean hydraulic oil to the new
transmission filter gasket. Install the new filter and
torque to 20-25 lb-ft (27-34 Nm).
MY6980
4
WARNING
NEVER lift a transmission alone; enlist the help of at
least one assistant or use a suitable hoist or overhead
crane and sling.