user manual

Groundsmaster 4100--D Hydraulic SystemPage 4 -- 45
Procedure for Cutting Deck Manifold Relief
Pressure Test
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximately10
minutes. Make sure the hydraulic tank is full.
2. Parkmachineonalevelsurfacewiththecuttingdeck
loweredandoff.Makesureengineisoffandtheparking
brake is engaged.
CAUTION
Prevent personal injuryand/or damageto equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. Locate deck manifold to be tested (Fig. 34). Discon-
nect hydraulic hose at deck manifold port (M1).
NOTE: Analternativetousingmanifoldport(M1)would
be to disconnect the inlet hydraulic hose at deck motor.
4. Install testerwith pressuregauges andflow meterin
series with the the disconnected hose and hydraulic
manifold port (M1) (or motor inlet if hose was discon-
nected at deck motor).
5. Make sure the flow control valve on tester is fully
open.
6. After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
CAUTION
Keep away from deck during test to prevent per-
sonal injury from the cutting blades.
7. Operate engine at full speed (2870 RPM). Engage
the cutting deck.
8. Watchpressure gaugecarefullywhileslowlyclosing
the flow control valve to fully closed.
9. As the relief valve lifts, system pressure should be
approximately:
2900 to 3100 PSI (200 to 213 bar) for the center
deck and LH wing deck
1900 to 2100 PSI (131 to 144 bar) for the RH wing
deck
10.Disengage cutting deck. Shut off engine and record
test results.
11.Ifspecification isnotmet,adjust orcleanreliefvalve
in deck manifold port (RV1). Adjust relief valve as fol-
lows:
NOTE: Do not remove valve from the hydraulic
manifold for adjustment.
A. Remove caponrelief valvewithan allenwrench.
B. To increase pressure setting, turn the adjust-
ment screw on the valve in a clockwise direction. A
1/8turnonthescrewwillmakeameasurablechange
in relief pressure.
C. To decrease pressure setting, turn the adjust-
mentscrewonthevalveinacounterclockwisedirec-
tion.A 1/8turn onthe screw willmake ameasurable
change in relief pressure.
D. Install and tightencap to secure adjustment. Re-
check relief pressure and readjust as needed.
12.Disconnect tester from manifold and hose. Recon-
nect hydraulic hose that was disconnected for test pro-
cedure.
1. Center deck manifold
2. LH wing deck manifold
3. RH wing deck manifold
Figure 34
FRONT
RIGHT
TO OIL COOLER
1
2
3
1. Deck manifold
2. Relief valve
3. Relief valve cap
Figure 35
1
2
3
FRONT DECK MANIFOLD SHOWN
Hydraulic
System