Procedure for Mow Circuit Relief Valve (R1) Pres-
sure Test:
10. Onmachineswithserialnumberabove270000000,
system pressure should be from 2700 to 3300 PSI
(186.3
to 227.7 bar). Record test results.
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
A. If this specification is met, go to step 11.
B. If specification is not met, open control valve on
tester, shut off engine and remove solenoid relief
valve(S1R1)onmanifold(Fig.23).Cleanorreplace
valve (see Hydraulic Manifold Service (Serial Num-
ber Above 270000000) in the Service and Repairs
section of this chapter). Retest relief valve (R1)
pressure.
2.
units lowered. Make sure engine is off and the parking
brake is engaged. Make sure the hydraulic tank is full.
Park machine on a level surface with the cutting
CAUTION
11.
er and shut off engine.
Disengage cutting units.Opencontrol valve ontest-
Before continuing further, read and become fa-
miliar with Precautions for Hydraulic Testing.
12.
Disconnect tester from manifold and hose. Recon-
nect hose to the bulkhead connection.
3.
Thoroughly clean and then disconnect hose con-
nection on the bulkhead that leads to the left reel motor.
13.
Correctly readjust bedknife on all cutting units.
4.
and bulkhead connection. Make sure the flow control
Install tester in series with the disconnected hose
valve on the tester is fully open.
FRONT
5.
To prevent reel damage, temporarily adjust bed-
knifeonallcuttingunitstoallowclearancebetweenbed-
knife and reel (no contact).
1
6.
On machines with backlap capabilities, make sure
backlap knob on the hydraulic manifold is in the mow
position.Makesurereelspeedknob(FC1)issettohigh-
est speed setting (fully open).
CAUTION
2
Figure 22
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
1.
2.
Hydraulic manifold (serial number under 260999999)
Relief valve (R1)
7.
50
Start engine and move throttle to full speed (2850 +
RPM. Engage the cutting units.
2
FRONT
8.
ing the flow control valve on the tester to fully closed.
Watch pressure gauge carefully while slowly clos-
9.
On machines with serial number under 260999999,
system pressure should be from 2160 to 2640 PSI (149
to 182.2 bar). Note: If a dethatching kit is installed, sys-
tem pressure should be from 2700 to 3300 PSI (186.3
to 227.7 bar). Record test results.
A. If this specification is met, go to step 11.
1
B. If specification is not met, open control valve on
tester, shut off engine and adjust relief valve (R1)
(Fig. 22) (see Adjust Manifold Relief Valves in the
Adjustments section of this Chapter). After adjust-
ment, retest relief valve (R1) pressure.
Figure 23
1.
2.
Hydraulic manifold (serial number above 270000000)
Solenoid relief valve (S1R1)
Greensmaster 3150
Page 4 -- 43
Hydraulic System (Rev. E)
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| Language | English |
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