Procedure for Cutting Deck Manifold Relief
Pressure Test
8. As the relief valve lifts, the pressure gauge needle
will momentarily stop or hesitate. System pressure
should be approximately:
IMPORTANT: Mow circuit flow for the Groundsmas-
ter 4100/4110 is approximately 16 GPM (61 LPM).
Use 40 GPM Hydraulic Tester #AT40002 (pressure
and flow) for this test (see Special Tools in this
chapter).
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
1.
Make sure hydraulic oil is at normal operating tem-
9. Fully open tester flow control valve and disengage
cutting deck. Shut off engine and record test results.
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
10.If
specification is not met, clean or adjust relief valve
in deck manifold port (RV1). See Adjust Control Man-
ifold Relief Valves in the Adjustments section of this
chapter for the valve adjustment procedure. Recheck
relief valve pressure setting after adjustment.
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingdeck
11.
After testing is completed, disconnect tester and
CAUTION
hose kit from manifold and machine hydraulic hose. Re-
connect hydraulic hose that was disconnected for test
procedure.
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.
TO OIL COOLER
3
RIGHT
1
FRONT
3.
Locate PTO manifold to be tested (Fig. 40). Thor-
oughly clean junction of manifold fitting and hydraulic
hose at manifold port (M1). Disconnect hydraulic hose
at manifold port (M1).
NOTE: Analternativetousingmanifoldport(M1)would
be to disconnect the inlet hydraulic hose at deck motor.
2
4.
Install 40 GPM Hydraulic Tester #AT40002 (pres-
sure and flow) in series with the disconnected hose and
hydraulic manifold port (M1) (or motor inlet if hose was
disconnected at deck motor). Use hydraulic hose kit
(see Special Tools in this chapter) to connect tester to
machine. Make sure the flow control valve on the
tester is fully open.
Figure 40
1.
2.
Center deck manifold
LH wing deck manifold
3.
RH wing deck manifold
5.
speed. Check for hydraulic leakage and correct before
proceeding with test.
After installing tester, start engine and run at idle
FRONT DECK
MANIFOLD SHOWN
1
2
CAUTION
3
Cutting deck blades will rotate with PTO switch
inONposition. Keepawayfromcutting deckdur-
ing test to prevent personal injury from rotating
blades. Do not stand in front of the machine.
Figure 41
6.
(2870
Move throttle so engine is running at high idle speed
RPM). Engage the cutting deck.
1.
2.
Deck manifold
Relief valve (RV1)
3.
Relief valve cap
7.
the tester flow control valve to fully closed.
Watch pressure gauge carefully while slowly closing
Groundsmaster 4100--D/4110--D
Page 4 -- 53
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Language | English |
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