Gear Pump (Vehicles With Air Cooled Engine) - Toro Workman 3000 Series Service Manual

Gear Pump (Vehicles with Air Cooled Engine)

Removal (Fig. 22)
1. Park vehicle on a level surface, raise and support bed
(if installed), shut engine off and engage the parking
brake.
2. Loosen pump drive belt and remove belt from pump
pulley (see Operator's Manual).
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.
CAUTION
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.
4. Disconnect hydraulic hoses from gear pump. Install
caps or plugs in hoses to prevent contamination and
leakage of hydraulic oil. Install plugs in pump fittings.
5. Remove gear pump from mount using Figure 22 as
a guide.
Installation (Fig. 22)
1. Install gear pump to mount using Figure 22 as a guide
and using the following instructions:
A. Apply antiseize lubricant to gear pump shaft be-
fore installing pulley.
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).
C. Install pump suction hose to fitting on pump, then
fill pump through pressure port of pump, with clean
Dexron III ATF.
D. Install pump pressure hose to fitting on pump.
2. After installing the pump and connecting hydraulic
hoses, install belt and adjust belt tension (see Opera-
tor's Manual).
Workman 3000/4000 Series
3. Check oil level in transaxle (see Operator's Manual).
Add Dexron III ATF if necessary.
4. Start the engine and operate at idle speed until air is
out of hydraulic system.
5. Stop the engine and check oil level in transaxle (see
Operator's Manual). Add Dexron III ATF if necessary.
6
1
4
3
2
130 to 160 in–lb
(14.7 to 18.1 N–m)
1. Drive belt
2. Lock nut
3. Flat washer
4. Pump pulley
5. Cap screw
6. Carriage screw
Page 9 – 27
9
11
10
8
7
ANTISIEZE
LUBRICANT
5
Figure 22
7. Mount
8. Suction hose
9. Square key
10. Gear pump
11. Lock nut (2 used)
12. Pressure hose
Hydraulic System
12