Operation and maintenance manual

Section 230-0050
SM 1394 Rev1 12-04
1
1
10
7
14
12
11
13
8
9
9
8
21
4
5
18
1920
6
7
2
15
3
17
16
3
20
17
18
19
8.5 mm
APPLY GREASE
SEALANT POSITION
11
10 mm APP.
4 mm
BODY SYSTEM - Main Hydraulic Pump
SM - 3366
OPERATION
Numbers in parentheses refer to Fig. 1. Refer to
Fig. 2 for typical pump operation.
DESCRIPTION
Numbers in parentheses refer to Fig. 1.
Mounted off the transmission power takeoff (PTO), the
hydraulic pump supplies oil to the body control valve to
operate the body hoist system. The hydraulic pump is
a rotary gear pump mounted to the transmission
housing and driven by the transmission gear train.
The major pump components are; body (1), front cover
(2), mounting flange (3), driveshaft and gear (11),
driven gear (12), wear plates (13 & 14), wear plate
seals (8) and bearings (7).
There are two ports on the hydraulic pump:
Port 'A' - Suction side from hydraulic oil tank
Port 'B' - Pressure supply to body control valve
SM - 1864
Fig. 2 - Typical Gear Pump Operation
Fig. 1 - Exploded View of Hydraulic Pump
7 - Bearing
8 - Wear Plate Seal
9 - Backup Seal
10 - Ring Seal
11 - Driveshaft and Gear
12 - Driven Gear
13 - Wear Plate
14 - Wear Plate
15 - Capscrew
16 - Capscrew
17 - Multistep Push Clip
18 - Seal
19 - Location Sleeve
20 - Seal
21 - Seal
1 - Body Housing
2 - Front Cover
3 - Mounting Flange
4 - Bolt
5 - Washer
6 - 'O'-Ring
INLET OUTLET
DRIVE GEAR
DRIVEN GEAR
DRIVE
DRIVEN