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Groundsmaster 5900/5910 Hydraulic SystemPage 4 -- 69
Removal (Fig 51)
1. Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Remove hood to gain access to gear pump (see
Hood Removal in the Service and Repairs section of
Chapter 7 -- Chassis).
3. Drain the hydraulic reservoir.
4. To preventcontamination ofhydraulic system during
pump removal, thoroughly clean exterior of pump and
fittings.
5. Label all hydraulic hose connections for assembly
purposes.
6. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
7. Disconnect all hydraulic lines from gear pump and
putcapsorplugs on open hydrauliclinesandfittings.La-
bel disconnected hydraulic lines for proper reassembly.
CAUTION
Make sure gear pump is properly supported be-
fore removing the pump mounting screws. Gear
pump assembly weighs approximately 42
pounds (19 kg).
8. Support gear pump assembly to prevent it from fal-
ling.
9. Remove two (2) cap screws that secure gear pump
to piston pump. Remove gear pump from machine.
10.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 51)
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. 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) cap screws.
Torque screws from 67 to 83 ft--lb (91 to 112 N--m).
3. Remove caps or plugs from hydraulic lines and fit-
tings. Install hydraulic lines to gear pump (see Hydraulic
Hose and Tube Installation in the General Information
section of this chapter).
4. Remove and replace hydraulic filters.
5. Fill hydraulic reservoir with new hydraulic oil.
6. Properly fill hydraulic system (see Charge Hydraulic
System in this section).
7. Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level.
8. Install hood (seeHood Installation inthe Service and
Repairs section of Chapter 7 -- Chassis).
Hydraulic
System