JLG 4394RT Service Manual - Manual (Page 129)

SECTION 3 - CHASSIS, PLATFORM & SCISSOR ARMS
3121249 – JLG Lift – 3-93
Pumps
ALLOW ENGINE AND COMPONENTS TO COOL DOWN BEFORE
SERVICING.
REMOVAL:
1. Disable machine operation. Disconnect, cap and
label all hydraulic hoses connected to pumps (1, 5).
Disconnect and label all wiring connected to pumps.
2. Remove the two bolts (2) and washers (3) attaching
the gear pump (1) to the axial pump (5). Carefully
remove the gear pump.
3. Remove and discard the o-ring (4).
4. Remove the two bolts (6) and washers (7) attaching
the axial pump to the flange of the motor. Carefully
remove the axial pump.
INSTALLATION:
1. Follow Removal Steps in reverse.
NOTE: Apply grease to internal splines of pump coupling (1)
and external splines of axial pump (5) shaft prior to
installing pump.
Install a new o-ring (4) during installation.
Apply Loctite® #242 to bolts (2, 6).
Torque mounting bolts (6) to 50 ft. lbs. (70 Nm)
NOTE: Refer to Section 4.9, Gear Pump and Section 4.10,
Axial HI 45 Pump for more information on pumps.
1
2
3
5
6
4
8
7
1. Gear Pump
2. Bolt, 3/8"-16NC x 1"
3. Washer
4. O-ring
5. Axial HI 45 Pump
6. Bolt, 1/2"-13NC x 1 1/2"
7. Washer,
8. Pump Coupling
Figure 3-66. Pump Assemblies (Deutz Engine)