Testing
Steering Valve and Pump Tests
1. Make sure the hydraulic oil is at normal operating
temperautre by operating the machine for approxi-
mately 5 minutes.
2. Engage the park
ing brakes, lower the cutting units to
the floor and turn the engine OFF.
3. Remove the cover from the steering tower.
4. Place a drain pan under the steering valve. Discon-
nect the
hydraulic hose at the AUX port of the steering
valve (Fig. 7a).
5. Connect the inlet hose of the tester to the AUX port
on
the steering valve. Connect the outlet hose of the
tester to hose that was disconnected in step 4.
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow gauge is showing that the oil will
flow from the steering valve, through the tester and
into the hose that was disconnected in step 4.
6. With the tester load valve f
ully open (counterclock-
wise) run the engine at full throttle.
Steering Valve Test (Control Valve Section)
7. Turn the steering wheel all the way in one direction
and hold it against the right stop.
There should be no flow as the steering wheel is held
against the right stop.
8. Release the steering wheel.
Flow should be approximately 3 gpm
when the steer-
ing wheel is released. If flow does not return to
approximately 3 gpm when the steering wheel is
released the control valve within the steering valve
may be sticking.
9. Repeat steps 7 and 8, turning the steering wheel in
the opposi
te direction.
Steering Pump Flow and Relief Pressure Test
10. While watching the pressure gauges,
slowly close
flow control valve on tester untils 1000 PSI is obtained
on gauge.
TESTER READING: Flow not less than 3.5 GPM at
1000 PSI.
11. If flow is lower than
3.5 GPM or a pressure of 1000
PSI cannot be obtained, check for restriction in pump
intake line. Check relief valve in pump for contamination
or wear. Adjust pump relief valve to 1250 PSI cracking
pressure by removing cap and turning adjustment screw
(Fig. 7b). If pump intake line is not restricted and relief
valve is functioning properly, remove pump and repair
or replace (see Pump Removal and Installation and
Pump Repair in Mowing Circuit Repairs section of
Chapter4 - Hydraulic system).
3
4
5
2
1
Figure 7a
1. Tester 4. Outlet line from tester
2. Load valve 5. Steering valve
3. Inlet line to tester
1
2
Figure 7b
1. Pump 2. Relief valve
Reelmaster
®
223-D/5100-D/5300-D Page 7 - 7 Testing
To Next Page
Loading...
