Toro Groundsmaster 4100-D Service Manual page 91

Procedure for Cutting Deck Manifold Relief
Pressure Test
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).
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. Park machine on a level surface with the cutting deck
lowered and off. Make sure engine is off and the parking
brake is engaged.
CAUTION
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.
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: An alternative to using manifold port (M1) would
be to disconnect the inlet hydraulic hose at deck motor.
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.
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
in ON position. Keep away from cutting deck dur-
ing test to prevent personal injury from rotating
blades. Do not stand in front of the machine.
6. Move throttle so engine is running at high idle speed
(2870 RPM). Engage the cutting deck.
7. Watch pressure gauge carefully while slowly closing
the tester flow control valve to fully closed.
Groundsmaster 4100--D/4110--D
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.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.
11. After testing is completed, disconnect tester and
hose kit from manifold and machine hydraulic hose. Re-
connect hydraulic hose that was disconnected for test
procedure.
RIGHT
FRONT
1. Center deck manifold
2. LH wing deck manifold
FRONT DECK
MANIFOLD SHOWN
2
3
1. Deck manifold
2. Relief valve (RV1)
Page 4 - - 53
TO OIL COOLER
3
1
2
Figure 40
3. RH wing deck manifold
1
Figure 41
3. Relief valve cap
Hydraulic System