Toro 07390 Workman HDX-Auto, Service Manual, Page: 217 / 280

Workman HDX Auto Page 7 − 33 Hydraulic System
Removal (Fig. 26)
1. Park vehicle on a level surface, raise and support
cargo bed (if installed), shut engine off and engage park-
ing brake. Remove key from the ignition switch.
2. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of this section.
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 the bed onto the bed support
and operate other hydraulic accessories.
3. Thoroughly clean junction of hydraulic hoses and
gear pump fittings. Disconnect hydraulic hoses from
pump fittings. Install caps or plugs in hoses and pump fit-
tings to prevent contamination and leakage of hydraulic
oil.
4. Remove two (2) set screws (item 3 in Fig. 27) on the
pump hub to allow gear pump shaft removal from pump
hub.
5. Support gear pump to prevent it from falling during
removal.
6. Remove four (4) flange nuts and flange head screws
that secure gear pump to mount.
7. Slide gear pump shaft out of pump hub and remove
gear pump from vehicle. Locate and retrieve square key
from the pump shaft.
8. If hydraulic fittings are to be removed from gear
pump, mark fitting orientation to allow correct assembly.
Remove fittings from pump and discard O−rings.
Installation (Fig. 26)
1. If fittings were removed from gear pump, lubricate
and place new O−rings onto fittings. Install fittings into
pump openings using marks made during the removal
process to properly orientate fittings. Tighten fittings
(see Hydraulic Fitting Installation in the General Infor-
mation section of this chapter).
2. Install square key to the pump shaft. Apply antiseize
lubricant to gear pump shaft.
3. Align pump shaft to pump hub. Slide pump shaft into
hub until pump flange holes align with holes in mount.
Take care to not damage the pump coupling.
4. Install four (4) flange head screws and flange nuts to
secure pump to mount. Do not fully tighten fasteners.
5. Position pump hub on pump shaft so that rubber cou-
pling is not distorted.
6. Apply Loctite #243 (or equivalent) to threads of pump
hub set screws (item 3 in Fig. 27). Install and tighten both
set screws to the pump hub to secure hub to the gear
pump shaft.
7. Allow coupler assembly to locate gear pump making
sure that no deflection of coupler components exists.
Fully tighten fasteners to secure gear pump to mount.
8. Remove plugs from hydraulic hoses and pump fit-
tings. Connect hydraulic hoses to gear pump (see Hy-
draulic Hose and Tube Installation in the General
Information section of this chapter).
9. Check oil level in the hydraulic reservoir and add cor-
rect oil if necessary.
10.Start the engine and operate at idle speed until air is
out of hydraulic system.
11. Stop the engine and recheck oil level in hydraulic
reservoir. Add correct oil if necessary.
12.Remove bed support from cargo bed lift cylinder and
lower bed.
1. Cap screw (2)
2. Flat washer (2)
3. Set screw (2)
4. Pump
hub
5. Rubber coupler
6. Flange nut (2)
7. Cap screw (2)
8. Coupler
adapter
9. Socket screw (2)
Figure 27
2
3
6
8
1
5
7
4
9
LOCTITE #243
LOCTITE #243
FRONT
RIGHT
Hydraulic
System