JLG G12-55A Service Manual - Manual (Page 93)

6-5 G10-55A, G12-55A
Transmission
6.4.3 Transmission Installation
1. Install both rear transmission mounts on the
transmission. Torque capscrews to 125-140 lb-ft
(170-190 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 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 shift solenoid wiring harness
connectors.
9. Secure the wiring harness to the 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 5.4.5, “Drive Shaft Installation.”
13. Install the air cleaner and tubing.
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).
16. Transmission oil may be added through the dipstick
tube (5). Remove the dipstick and add hydraulic oil.
Check the oil level by taking intermittent dipstick
readings as outlined in the appropriate Operation &
Safety Manual. DO NOT overfill. Reinstall the
dipstick when finished.
17. Transmission transfer case fluid may be added
through the fill plug (6). Remove the fill plug and add
approximately 1.5 quarts (1,4 liters) of hydraulic oil.
Install fill plug and tighten.
18. Properly connect the battery.
19. Install the engine cover.
20. Close and secure the engine cover.
21. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
6.4.4 After Transmission Service or
Replacement
In general:
1. Check the transmission oil level and add oil as
required.
2. Disconnect and clean all transmission cooler hoses.
When possible, remove transmission lines from the
machine for cleaning.
3. Drain and flush the entire transmission cooling
system.
4. Thoroughly clean transmission filter screens and
cases, and replace transmission filter elements.
5. Reassemble all components and fill the transmission
with clean, fresh hydraulic oil through the dipstick
tube opening (5). Check the level by taking
intermittent dipstick readings as outlined in the
appropriate Operation & Safety Manual. DO NOT
overfill. Reinstall the dipstick when finished.
WARNING
NEVER lift a transmission alone; enlist the help of at
least one assistant or use a suitable hoist or overhead
crane and sling.
MY0990
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