Toro Groundsmaster 5900 Series Service Manual page 196

Piston (Traction) Pump Removal
Piston (Traction) Pump Installation
Hydraulic System: Service and Repairs
(Figure
12. If hydraulic fittings are to be removed from piston pump, mark fitting
orientation to allow correct assembly. Remove fittings from pump and discard
O−rings.
(Figure
1. If fittings were removed from piston 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
the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings) (page
2. Attach hoist to piston pump to support pump and also to allow safe installation
of pump into machine.
3. Apply anti seize lubricant to internal splines of pump coupler and external
splines of pump shaft.
To prevent spring coupler damage, make sure that piston pump is
properly supported and does not put side load on coupler during
pump installation.
4. Carefully raise piston pump into the machine, align pump input shaft to spring
coupler on engine and position it to the engine flywheel plate. Support pump
to prevent it from producing any side load into coupler and also to align pilot
diameter of pump to flywheel plate bore.
5. While maintaining pump alignment with spring coupler and flywheel plate,
apply medium strength thread locker and install four (4) cap screws and
washers to secure piston pump to flywheel cover plate. Tighten cap screws
from 115 to 120 N·m (85 to 89 ft−lb).
6. Install gear pump to piston pump (see
g287907
1. Piston (traction) pump
7. Fill piston (traction) pump housing with 2.1 L (0.55 gal) of new hydraulic
oil through the charge return (90o barbed fitting) at the top of the pump
(Figure 89). This will ensure that internal pump components have adequate
lubrication during initial operation.
87) (continued)
87)
IMPORTANT
Gear Pump (page
Figure 89
2. Piston pump charge return
Page 5–96
Installing
5–9)).
5–86)).
1
Groundsmaster ® 5900 & 5910
16227SL Rev B