JLG SSV10 Service Manual - Manual (Page 34)

SECTION 3 - BASE COMPONENTS
3-6 – JLG Lift – 3121187
3.5 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.
IMPORTANT
DISCONNECT THE LEFT SIDE BATTERY (+) POSITIVE BATTERY
TERMINAL BEFORE REMOVING THE PUMP/MOTOR FROM THE
MACHINE.
Pump-Motor Assembly - Remove/Install
BE CERTAIN THE MAST IS FULLY LOWERED BEFORE REMOV-
ING ANY HYDRAULIC LINES FROM THE PUMP UNIT. WEAR PRO-
TECTIVE GEAR WHEN WORKING AROUND PRESSURIZED
HYDRAULIC LINES. REMOVE CONNECTIONS CAREFULLY AND
CAP ALL LINES AND PORTS WHEN DISCONNECTED.
Hydraulic Pump Assembly Components
1. Hydraulic Pump/Motor/Res-
ervoir Assembly
2. (–) Power Cable from
Ground Control Station (a)
3. (+) Power Cable from Ground
Control Station (a)
4. Hydraulic Extend Pressure
Line to Lift Cylinder (b)
5. Hydraulic Return Line from
Lift Cylinder (b)
NOTE: (a) Shown with protective cover removed.
(b) Completely lower platform before loosening any
hydraulic lines to remove any pressure remaining in the
lines. Take proper caution and wear protective gear any-
time you are opening a hydraulic line.
Once power cables and hydraulic lines are removed from
this side of pump assembly, remove the mounting
screws from the other side of the pump, see the follow-
ing illustration.
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2
3
4
5