Toro Groundsmaster 5900 Series Service Manual page 187

Gear Pump Removal
Gear Pump Installation
Groundsmaster ® 5900 & 5910
16227SL Rev B
(Figure 81) (continued)
5. To prevent contamination of hydraulic system during pump removal,
thoroughly clean exterior of pump and fittings.
6. Label all hydraulic hose connections for assembly purposes.
7. Disconnect all hydraulic lines from gear pump and two (2) hydraulic hoses
from bottom of piston pump (items 15 and 16). Put caps or plugs on open
hydraulic lines and fittings. Label disconnected hydraulic lines for proper
reassembly.
Make sure gear pump is properly supported before removing the
pump mounting screws. Gear pump assembly weighs approximately
30 kg (68 lb).
8. Support gear pump assembly to prevent it from falling.
9. Remove two (2) cap screws and flat washers that secure gear pump to piston
pump. Remove gear pump from machine.
10. Locate and discard O−ring between gear pump and piston pump (item 3).
11. 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.
(Figure 81)
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 Hoses and Tubes (O-Ring Face Seal) (page
2. Apply clean petroleum jelly or light grease to new O−ring (item 3) and position
O−ring in piston pump.
3. Apply anti seize lubricant to splines of gear pump shaft and position gear
pump to piston pump. Align gear pump input shaft splines with piston pump
coupler and slide gear pump input shaft into piston pump coupler. Secure
gear pump to piston pump with two (2) flat washers and cap screws. Tighten
screws from 112 to 140 N·m (83 to 103 ft−lb).
4. Remove caps or plugs from hydraulic lines and fittings. Install hydraulic lines
to gear pump (see
(page 5–7)). Tighten 1 in. hose clamp from 5 to 6 N·m (45 to 55 in−lb) and
1−1/4 in. hose clamps to 10 N·m (90 in−lb).
5. Remove and replace hydraulic filters.
6. Fill hydraulic reservoir with new hydraulic oil.
7. Properly fill hydraulic system (see
8. Stop engine and check for hydraulic oil leaks. Check hydraulic reservoir
oil level.
9. Install side shrouds if previously removed and close hood (see
Lower Shrouds (page
CAUTION
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal)
Charge Hydraulic System (page
7–47)).
Page 5–87
Installing
5–7)).
5–79)).
Hood and
Hydraulic System: Service and Repairs