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Groundsmaster 4000--D Hydraulic SystemPage 4 -- 129
Removal (Fig. 90)
1. Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
3. To prevent contamination ofhydraulic system during
lift/lower control valve removal, thoroughly clean exteri-
or of valve and fittings.
4. Remove lift/lower control valve using Figure 90 as a
guide.
5. If hydraulic fittings are to be removed from control
valve, mark fitting orientation to allow correct assembly.
Remove fittings from valve and discard O--rings.
Installation (Fig. 90)
1. If fittings were removed from control valve, lubricate
and place new O--rings onto fittings. Install fittings into
port 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 control valve using Figure 90 as a guide.
A. Ifvalve bracket(item2) was removed, tightencap
screws (item 24) only until the washer (item 23) be-
gins to seat against the isolator (item 3). The isolator
should not be deformed during bracket installation.
3. Make surehydraulic tank is full. Add correctoil ifnec-
essary before returning machine to service.
Hydraulic
System