JLG 723A Service Manual - Manual (Page 69)

6-3 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
Transmission
6.2 SAFETY INFORMATION
6.3 TRANSMISSION DESCRIPTION
Instructions in this section pertain mainly to general
specifications, towing, maintenance information, and
transmission removal and installation procedures. For
internal transmission service instructions and detailed
specifications contact the local JLG dealer for a copy of
the Rexroth Hydrostatic Transmission Repair Manual
(P/N 31200124).
More information can be obtained from the serial number
plate directly mounted on the transmission. Information
specified on the serial number plate includes the
transmission model number, the transmission serial
number and other data. Information on the serial number
plate is required in correspondence regarding the
transmission.
6.4 TRANSMISSION SPECIFICATIONS
6.4.1 Transmission Maintenance
The transmission is a hydraulic component and requires
the same maintenance as the hydraulic system. Refer to
Section 2.5, “Maintenance Schedules.”
Performance criteria is based on full throttle engine
speed unless otherwise specified or not applicable.
6.5 TRANSMISSION REPLACEMENT
Note: Contact the local JLG dealer if internal
transmission repair is required during the warranty
period.
Cleanliness is of extreme importance. Before attempting
to remove the transmission, thoroughly clean the exterior
of the transmission to help prevent dirt from entering
during the replacement process. Avoid spraying water or
cleaning solution onto or near the transmission shift
solenoids and other electrical components.
6.5.1 Transmission Removal
1. Park the machine on a firm, level surface, fully
retract the boom, lower the boom, place the
transmission control lever in (N) NEUTRAL, turn rear
wheels to give easier access to rear of engine
compartment, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the battery.
5. Remove the air cleaner assembly.
6. Remove hood support at rear of engine.
7. Drain the hydraulic oil reservoir. Refer to Section
8.8.2, “Hydraulic Oil Reservoir Draining.”
8. Label, disconnect and cap all hydraulic hoses
attached to transmission, cap all fittings and
openings to keep dirt and debris from entering
hydraulic system.
9. Label and disconnect all electrical connections
attached to the transmission.
10. Wipe up any spilled hydraulic oil.Vertically secure
transmission with a lifting strap or chain. Use 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.
11. Remove the two Allen head bolts that attach the
transmission to the engine.
WARNING
DO NOT service the machine without following all
safety precautions as outlined in the “Safety Practices”
section of this manual.
WARNING
The transmission may move while hoisting it out of the
chassis. Carefully move the transmission and adjust
the sling as needed. Keep fingers, hands, legs and
other body parts clear of the transmission.