JLG 10MSP Service Manual - Manual (Page 52)

SECTION 3 - BASE COMPONENTS
3-20 – JLG Lift – 3121228
3.6 PUMP-MOTOR ASSEMBLY -
SERVICE PROCEDURE
General
The following is a complete tear-down/re-assembly of the
machines’ pump/motor assembly. No internal parts to the
hydraulic pump are serviced by JLG except for a pump
installation seal kit. Also the only parts serviceable internal
to the pump electric motor is the motor brush kit.
NOTE: During reassembly of the pump/motor assembly,
apply a liberal coat of JLG recommended hydraulic
fluid to all seals and o-rings.
Also keep all internal metal parts clean and coated
with hydraulic fluid to prevent surface corrosion.
JLG recommends replacing all seals and o-rings
when disassembling and reassembling the pump/
motor unit.
DISCONNECT THE LEFT SIDE BATTERY (+) POSITIVE BATTERY
TERMINAL BEFORE REMOVING THE PUMP/MOTOR FROM THE
MACHINE.
Hydraulic Pressure Settings and Adjustment
Adjust system pressure so that platform will raise with
maximum rated capacity in platform.
Perform pressure adjustment with oil at normal operating
temperature. If pressure is set when oil is cold, platform
may not raise rated load after oil has warmed.
The following pressure setting is the factory recom-
mended (initial) setting;
Turning adjustment screw clockwise increases system
pressure, turning screw counterclockwise decreases
system pressure. (See Figure 3-3., Hydraulic Pressure
Adjustment Screw. (Machine Front Cover Removed)
MODEL PRESSURE SETTING
10MSP 1800 PSI
Figure 3-3. Hydraulic Pressure Adjustment Screw.
(Machine Front Cover Removed)
1. Pressure Adjustment
Screw
2. Remove Adjust Screw Cap
3. Pump/Ground Station
Mounting Bracket
4. Ground Control Station
NOTE: Machine front cover must be removed to access
pump motor.
1
4
3
2