Gear Pump (Vehicles with Liquid Cooled Engine)
Removal (Fig. 20)
3. Check oil level in transaxle (see Operator’s Manual).
Add Dexron III ATF if necessary.
1.
Park vehicle on a level surface, raise and support bed
(if installed), shut engine off and engage parking brake.
4. Start the engine and operate at idle speed until air is
out of hydraulic system.
2.
Loosen pump drive belt and remove belt from pump
pulley (see Operator’s Manual).
5. Stop the engine and check oil level in transaxle (see
Operator’s Manual). Add Dexron III ATF if necessary.
3.
Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
ANTISIEZE
LUBRICANT
27
to 33 in–lb
1
2
2
(3
to 3.7 N–m)
1
CAUTION
13
11
Before performing any service or repair on hy-
draulic system components, relieve system
pressure to avoid injury from pressurized hy-
draulic oil. Stop the engine, remove key from the
ignition switch, rotate the steering wheel in both
directions, lower or support the bed and operate
other hydraulic accessories.
3
10
9
4
6
4.
21).
Disconnect hydraulic hoses from gear pump (Fig.
Install caps or plugs in hoses and pump fittings to
prevent contamination and leakage of hydraulic oil.
5
8
7
5.
Remove mount plate with pump from vehicle.
LOCTITE #242
130
(14.7
to 160 in–lb
to 18.1 N–m)
6.
20
Remove gear pump from mount plate using Figure
as a guide.
Figure 20
Installation (Fig. 20)
1.
Gear pump
8.
9.
10. Lock washer (4 used)
11. Fan
12. Mount plate
13. Set screw
Lock nut
Cap screw (4 used)
2.
3.
4.
5.
6.
7.
Pressure hose
Suction hose
Lock nut (4 used)
Cap screw (4 used)
Pump pulley
1.
Install parts as shown in Figure 20 and using the fol-
lowing instructions:
A. Apply antiseize lubricant to gear pump shaft be-
fore installing pulley.
Flat washer
B. After installing key and pulley on pump shaft,
tighten lock nut (Item 8) to a torque from 130 to 160
in–lb (14.7 to 18.1 N–m).
1
2
C. Apply Loctite #242 (or equivalent) to threads of
set screw and install set screw into pulley hub.
Torque set screw from 27 to 33 in–lb (3 to 3.7 N–m).
D. Install pump suction hose to bottom fitting on
pump, then fill pump through pressure port on top of
pump, with clean Dexron III ATF.
E. Install pump pressure hose to top fitting on pump.
3
2.
hoses, install belt and adjust belt tension (see Opera-
tor’s Manual).
After installing the pump and connecting hydraulic
Figure 21
3. Suction hose
1.
2.
Gear pump
Pressure hose
Hydraulic System
Page 9 – 26
Workman 3000/4000 Series
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