user manual

Groundsmaster 4100--D Hydraulic SystemPage 4 -- 125
Removal (Fig. 88)
1. Park machineon alevels urface, lowercutting deck,
stop engine, engage 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 this section.
3. Topreventcontaminationofhydraulicsystemduring
control valve removal, thoroughly cleanexterior of con-
trol valve and fittings.
4. Remove lift/lower control valve using Figure 88 as a
guide.
5. If hydraulic fittings are to be removed from control
valve,mark fittingorientation toallow correctassembly.
Remove fittings from valve and discard O --rings.
Installation (Fig. 88)
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 lift/lower control valve using Figure 88 as a
guide.
A. Ifvalvebracket(item2)wasremoved,tightencap
screw(item24)onlyuntilthewasher(item23)begins
to seat against the isolator (item 3). The isolator
should not be deformed.
3. After installation, check operation of cutting deck
raise and lower switches (see Cutting Deck Raise and
Lower Switches in the Adjustment section of Chapter 5
-- Electrical System).
4. Makesurehydraulictankisfull.Addcorrectoilifnec-
essary before returning machine to service.
Hydraulic
System