caution - Toro

Procedure for Cutting Deck Manifold Relief
Pressure Test
1. Make sure hydraulic oil is at normal operating temperature
by operating the machine for approximately 10
minutes. Make sure the hydraulic 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 equipment.
Read all WARNINGS, CAUTIONS and Precautions
for Hydraulic Testing at the beginning
of this section.
3. Locate deck manifold to be tested (Fig. 34). Disconnect
hydraulic hose at deck manifold port (M1).
NOTE: An alternative to using manifold port (M1) would
be to disconnect the inlet hydraulic hose at deck motor.
4. Install tester with pressure gauges and flow meter in
series with the the disconnected hose and hydraulic
manifold port (M1) (or motor inlet if hose was disconnected
at deck motor).
5. Make sure the flow control valve on tester is fully
open.
6. After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
11.If specification is not met, adjust or clean relief valve
in deck manifold port (RV1). Adjust relief valve as follows:
NOTE: Do not remove valve from the hydraulic
manifold for adjustment.
A. Remove cap on relief valve with an allen wrench.
B. To increase pressure setting, turn the adjustment
screw on the valve in a clockwise direction. A
1/8 turn on the screw will make a measurable change
in relief pressure.
C. To decrease pressure setting, turn the adjustment
screw on the valve in a counterclockwise direction.
A 1/8 turn on the screw will make a measurable
change in relief pressure.
D. Install and tighten cap to secure adjustment. Recheck
relief pressure and readjust as needed.
12.Disconnect tester from manifold and hose. Reconnect
hydraulic hose that was disconnected for test procedure.
RIGHT
FRONT
1
3
TO OIL COOLER
2
Hydraulic
System
CAUTION
Keep away from deck during test to prevent personal
injury from the cutting blades.
1. Center deck manifold
2. LH wing deck manifold
Figure 34
3. RH wing deck manifold
7. Operate engine at full speed (2870 RPM). Engage
the cutting deck.
8. Watch pressure gauge carefully while slowly closing
the flow control valve to fully closed.
FRONT DECK MANIFOLD SHOWN
2
1
9. As the relief valve lifts, 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
10.Disengage cutting deck. Shut off engine and record
test results.
Groundsmaster 4100--D
Page 4 - 45
3
1. Deck manifold
2. Relief valve
Figure 35
3. Relief valve cap
Hydraulic System