Procedure for PTO Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
9. Disengage cutting decks. Shut offengine and record
testresults.Ifspecification isnotmet,adjustorcleanre-
lief valve in deck manifold port (RV1). Adjust relief valve
as follows:
1.
NOTE: Do not remove valve from the hydraulic man-
ifold for adjustment.
2.
decks lowered and off. Make sure engine is off and the
parking brake is applied.
Park machine on a level surface with the cutting
A. Remove cap on relief valve with an allen wrench.
B. To increase pressure setting, turn the adjust-
ment screw on the valve in a clockwise direction. A
CAUTION
1/8
turnonthescrewwillmakeameasurablechange
in relief pressure.
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
C. To decrease pressure setting, turn the adjust-
mentscrew onthevalve inacounterclockwise direc-
tion. A 1/8 turn on the screw will make a measurable
change in relief pressure.
3.
nect hydraulic hose at deck manifold port (M1).
Locate deck manifold to be tested (Fig. 34). Discon-
D. Reinstall and tighten cap to secure adjustment.
Recheck relief pressure and readjust as needed.
NOTE: Analternativetousingmanifoldport(M1)would
be to disconnect theinlet hydraulic hose tothe deck mo-
tor.
10.Disconnect
nect hydraulic hose that was disconnected for test pro-
cedure.
tester from manifold and hose. Recon-
4.
and hydraulic manifold port (M1) (or motor inlet if hose
was disconnected at deck motor).
Installtesterinserieswiththethedisconnected hose
RIGHT
FRONT
3
5.
Install tester in series with the hose and hydraulic fit-
ting. Make sure the flow control valve on tester is fully
open.
2
CAUTION
Keepawayfromdecksduringtesttopreventper-
sonal injury from the cutting blades.
1
6.
RPM). Engage the cutting decks.
Start engine and move throttle to full speed (2870
Figure 34
3. RH PTO manifold
1.
2.
Front PTO manifold
LH PTO manifold
7.
Watch pressure gauge carefully while slowly closing
the flow control valve to fully closed.
FRONT PTO MANIFOLD SHOWN
2
8.
As the relief valve lifts, system pressure should be
1
approximately:
2900
to 3100 PSI (200 to 213 bar) for the front and
left decks
1900
to 2100 PSI (131 to 144 bar) for the right deck
3
Figure 35
3. Relief valve cap
1.
2.
PTO manifold
PTO relief valve (RV1)
Groundsmaster 4000--D
Page 4 -- 45
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
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|
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| Language | English |
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