JLG G12-55A Service Manual - Manual (Page 95)

6-3 G10-55A, G12-55A
Transmission
Note: These instructions cover only the routine
maintenance, removal, installation and troubleshooting
of transmission. Refer to local distributor and applicable
Transmission Service Manual for assistance with
comprehensive transmission diagnosis, repair and
component replacement.
6.2 TRANSMISSION SERIAL NUMBER
Transmission serial number plate (1) is located on front of
transmission case behind oil dipstick. Information on the
serial number plate is required in correspondence
regarding the transmission.
6.3 TRANSMISSION SPECIFICATIONS
AND MAINTENANCE INFORMATION
For transmission, oil specifications and maintenance
information, refer to Section 2, “General Information and
Specifications.”
Detailed transmission service instructions are provided in
the following publications:
• Service Manual (P/N 31200241)
• Parts Manual (P/N 31200728)
6.4 TRANSMISSION REPLACEMENT
Note: Contact local distributor if internal transmission
repair is required during the warranty period.
Cleanliness is of extreme importance. Before attempting
to remove transmission, thoroughly clean exterior of
transmission to help prevent dirt from entering during
replacement process. Avoid spraying water or cleaning
solution onto or near transmission shift solenoids and
other electrical components
6.4.1 Transmission Removal
1. Park machine on a firm, level surface, level machine,
fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL, engage park brake
and shut engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel.
3. Open the engine cover. Allow the system fluids to cool.
4. Remove engine cover. Mark position of cover to help
with cover adjustment when being reinstalled.
5. Drain the hydraulic oil reservoir. Refer to Section
8.5.1, “Hydraulic Oil Reservoir Draining.”
6. Properly disconnect the batteries.
7. Thoroughly clean the transmission and surrounding
area, including all the hoses and fittings,
before proceeding.
WARNING
DO NOT service the machine without following all
safety precautions as outlined in Section 1, “Safety
Practices,” of this manual.
MY6960
1
WARNING
NEVER lift a transmission alone; enlist the help of at
least one assistant or use a suitable hoist or overhead
crane and sling with a minimum lifting capacity of
1000 lb (454 kg).