Test No. 1: Checking Traction Circuit Working Pressure Or Relief Pressure - Toro Groundsmaster 455-D Service Manual

TEST NO. 1: Checking Traction Circuit Working Pressure or Relief Pressure

WORKING Pressure Check:
1. Make sure hydraulic oil is at normal operating tem­
perature by operating machine for approximately 10
minutes.
2. Lower cutting units, engage parking brake and stop
the engine.
3. Raise seat to get access to hydraulic test fittings.
Remove access cover from in front of auxiliary pump.
4. Install a 10,000 PSI gauge with extension hose onto
the traction circuit quick disconnect fitting for the func­
tion to be checked. Install gauge and hose so gauge can
be observed while sitting on seat, BUT WILL NOT
CONTACT CUTTING UNIT WHEN RAISED.
5. Operate machine while monitoring gauge.
RANGE OF TESTER READINGS: 100 - 6100 PSI
RELIEF Pressure Check
CAUTION
Move machine to an open area away from
people and obstructions.
6. Set traction pedal stop for minimum ground speed
(1 MPH).
7. Start the engine and move throttle to full speed
(3000 RPM).
8. Release parking brake.
9. Engage the traction pedal to start machine in motion.
10. Maintain traction pedal engagement while momen­
tarily engaging the brakes to bring the unit to a halt and
read gauge.
TESTER READING TO BE 6000 ± 100 PSI.
Testing
1
1. Traction FORWARD test port
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Figure 9
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Groundsmaster 455-D