JLG 723A Service Manual - Manual (Page 71)

6-5 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
Transmission
6.6 TRANSMISSION FILTER
REPLACEMENT
The hydrostatic pump filter is located on the left (inside)
of the pump (1).
Cleanliness is of extreme importance. Before attempting
to remove the transmission filter, 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
direction solenoids and other electrical components.
6.6.1 Filter 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. To allow easier access to the filter, label, disconnect
and cap all hydraulic hoses in the filter area, cap all
fittings and openings to keep dirt and debris from
entering hydraulic system.
7. Place a container or shop rags below the filter
housing to contain any spilled hydraulic oil.
8. Using a 25 mm (15/16 in) wrench, loosen and
remove the filter housing (2), filter (3) and spring (4).
6.6.2 Filter Installation
1. Clean the area surrounding the hydraulic pump filter.
2. Install a new o-ring (5) on the base of the filter
housing and lubricate the new o-ring with clean
hydraulic oil.
3. Install the small end of the filter spring (4) into the
filter base (6).
4. Install the filter (3) into the filter base (6) directly
behind the filter spring.
5. Slowly screw the filter housing into the filter base
keeping the filter and housing aligned.
6. Torque the filter housing to 45 Nm (33 lb-ft).
7. Uncap and reconnect the previously labeled hoses
to their appropriate locations.
8. Fill hydraulic reservoir and bleed the system.
9. Reinstall the air cleaner assembly.
10. Properly connect the battery.
11. Close and secure the engine cover.
12. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
MZ5420
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