Toro Groundsmaster 4100-D - Page 91

Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 53
Procedure for Cutting Deck Manifold Relief
Pressure Test
IMPORTANT: Mowcircuit flowforthe 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).
1. 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.
2. Parkmachineonalevelsurfacewiththecuttingdeck
loweredandoff.Makesureengineisoffandtheparking
brake is engaged.
CAUTION
Prevent personalinjury and/or damage to equip -
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
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.
4. Install 40 GPM Hydraulic Tester #AT40002 (pres-
sureand flow) in series with the disconnected hose and
hydraulic manifold port (M1) (or motor inlet if hose w as
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.
5. After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
CAUTION
Cutting deck blades will rotate with PTO switch
inONposition.Keepawayfromcuttingdeckdur-
ing test to prevent personal injury from rotating
blades. Do not stand in front of the machine.
6. Move throttle soengineisrunningathighidlespeed
(2870 RPM). Engage the cutting deck.
7. Watchpressuregauge carefullywhile slowlyclosing
the tester flow control valve to fully closed.
8. As the relief valve lifts, the pressure gauge needle
will momentarily stop or hesitate. 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
9. Fully open tester flow control valve and disengage
cutting deck. Shut off engine and record test results.
10.Ifspecificationis not met,clean oradjustreliefvalve
in deck manifold port (RV1). See Adjust Control Man-
ifold Relief Valves in the Adjustments s ection of this
chapter for the valve adjustment procedure. Recheck
relief valve pressure setting after adjustment.
11.After testing is completed, disconnect tester and
hosekitfrommanifoldandmachinehydraulichose.Re-
connect hydraulic hose that was disconnected for test
procedure.
1. Center deck manifold
2. LH wing deck manifold
3. RH wing deck manifold
Figure 40
FRONT
RIGHT
TO OIL COOLER
1
2
3
1. Deck manifold
2. Relief valve (RV1)
3. Relief valve cap
Figure 41
FRONT DECK
MANIFOLD SHOWN
1
2
3
Hydraulic
System