Procedure for PTO Relief Pressure Test
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
8. Fully open tester flow control valve and disengage
cutting decks. Shut off engine and record test results. If
specification is not met, adjust or clean relief valve in
deck manifold port (RV1). Adjust relief valve as follows:
1.
NOTE: Do not remove relief valve from the hydraulic
manifold for adjustment.
2.
Park machine on a level surface with the cutting
decks lowered and off. Make sure engine is off and the
parking brake is applied.
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
1/8turnonthescrewwillmakeameasurablechange
in relief pressure.
CAUTION
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.
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.
D. Reinstall and tighten cap to secure adjustment.
Recheck relief pressure and readjust as needed.
3.
nect hydraulic hose at deck manifold port (M1).
Locate deck manifold to be tested (Fig. 42). Discon-
9.
nect hydraulic hose that was disconnected for test pro-
cedure.
Disconnect tester from manifold and hose. Recon-
NOTE: Analternativetousingmanifoldport(M1)would
be to disconnect theinlet hydraulic hose tothe deck mo-
tor.
4.
Install tester (flow and pressure) in series with the
disconnected hose and hydraulic manifold port (M1) (or
motor inlet if hose was disconnected at deck motor).
Make sure the flow control valve on tester is fully open.
RIGHT
FRONT
3
CAUTION
2
Cutting deck blades will rotate when lowered
with PTO switch in ON position. Keep away from
cutting decks during test to prevent personal in-
jury from rotating blades. Do not stand in front of
the machine.
1
5.
(2870
Start engine and move throttle to high idle speed
RPM). Engage the cutting decks.
Figure 42
3. RH PTO manifold
1.
2.
Front PTO manifold
LH PTO manifold
6.
the tester flow control valve to fully closed.
Watch pressure gauge carefully while slowly closing
FRONT PTO MANIFOLD SHOWN
2
1
7.
approximately:
As the relief valve lifts, system pressure should be
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 43
3. Relief valve cap
1.
2.
PTO manifold
PTO relief valve (RV1)
Groundsmaster 4000--D/4010--D
Page 4 -- 53
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 10176SL, Toro Groundsmaster 30446, Toro Groundsmaster 30448, Toro Groundsmaster 4010 D |
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| Language | English |
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