JLG G12-55A Service Manual - Manual (Page 94)

Transmission
6-6 G10-55A, G12-55A
6. 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.
7. Run the engine for two minutes at idle to help prime the
torque converter and the transmission oil lines.
8. Recheck the level of the fluid in the transmission
with the engine running at idle.
9. Add hydraulic oil as necessary to bring the fluid level
up until it reaches the FULL mark on the dipstick.
Recheck the oil level when it reaches operating
temperature 180-200° F (83-94° C).
10. Recheck all drain plugs, lines, connections, etc., for
leaks, and tighten where necessary.
6.5 TORQUE CONVERTOR DIAPHRAGM
6.5.1 Torque Convertor Diaphragm
Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake, and shut the
engine OFF.
Note: In order to remove the engine drive plates, the
engine and transmission must be separated.
2. Refer to Section 6.4.1, “Transmission Removal,” or
Section 7.9.1, “Engine Removal.”
3. Remove the four bolts holding the diaphragms to the
flywheel.
4. With the drive plates and torque converter removed,
loosen and remove the four bolts (7) and eight lock
washers holding the two diaphragms (8) to the
torque converter (9).
5. Replace both diaphragms if damaged.
6.5.2 Torque Convertor Diaphragm
Installation
1. Install the two new diaphragms on the torque
converter and install the four bolts with lock washers.
2. Mount the diaphragm/converter assembly to the
transmission.
3. Refer to Section 6.4.3, “Transmission Installation,” or
Section 7.9.2, “Engine Installation,” for the
remainder of the installation.
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