Toro Groundsmaster 3500-D Service Manual page 93

Procedure for Manifold Relief Valve (R1) Pressure
Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Park machine on a level surface with the cutting units
lowered and off. Make sure engine is off and the parking
brake is engaged.
3. Read Precautions for Hydraulic Testing.
4. Disconnect hose connection from hydraulic fitting on
manifold port (M1) (Figure 26).
Note: An alternative to using manifold port (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. Install tester in series with the hose and hydraulic fit-
ting. Make sure the flow control valve on tester is fully
open.
CAUTION
Keep away from decks during test to prevent per-
sonal injury from the cutting blades.
6. Start engine and move throttle to full speed (3050 +
50 RPM). Engage the cutting units.
7. Watch pressure gauge carefully while slowly closing
the flow control valve to fully closed.
8. System pressure should be from 3350 to 3600 PSI
as the relief valve lifts.
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.
Groundsmaster 3500--D
1. Hydraulic manifold
2
1. Hydraulic manifold
3
1
1. Hydraulic deck motor
2. Inlet hose
Page 4 - - 45
1
2
Figure 26
2. Manifold port (M1)
Figure 27
2. Manifold port (M1)
Figure 28
3. Relief valve
Hydraulic System (Rev. D)
1
2