Procedure for Manifold Relief Valve (R1) Pressure
Test:
1.
perature by operating the machine for approximately 10
minutes.
Make sure hydraulic oil is at normal operating tem-
1
2
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
3.
4.
Read Precautions for Hydraulic Testing.
Disconnect hose connection from hydraulic fitting on
manifold port (M1) (Figure 26).
Figure 26
1.
Hydraulic manifold
2.
Manifold port (M1)
Note:
Analternativetousingmanifoldport(M1)would
be to disconnect the inlet hydraulic hose to the front, left
deck motor. The motor inlet is opposite from the relief
valve on the motor (Figure 28).
5.
ting. Make sure the flow control valve on tester is fully
open.
Install tester in series with the hose and hydraulic fit-
1
CAUTION
Keepawayfromdecksduringtesttopreventper-
sonal injury from the cutting blades.
2
6.
50
Start engine and move throttle to full speed (3050 +
RPM). Engage the cutting units.
7.
the flow control valve to fully closed.
Watch pressure gauge carefully while slowly closing
Figure 27
2.
1.
Hydraulic manifold
Manifold port (M1)
8.
System pressure should be from 3350 to 3600 PSI
as the relief valve lifts.
3
A. If specification is not met, shut off engine and
clean or replace SRV valve (R1). Return to step 5.
B. If this specification is met, proceed to step 9.
9.
Disengage cutting units. Shut off engine.
10.Disconnect
tester from manifold and hose. Recon-
nect hydraulic hose that was disconnected for test pro-
cedure.
2
1
Figure 28
1.
2.
Hydraulic deck motor
Inlet hose
3.
Relief valve
Groundsmaster 3500--D
Page 4 -- 45
Hydraulic System (Rev. D)
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