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Implement Relief Pressure Test
NOTE: See Sauer–Sundstrand IHT Service Manual for
more information.
Use a 5,000 PSI (350 Bar) test gauge.
Specification:1,000 to 1,100 PSI (69 to 76 Bar)
1. Make sure hydraulic oil is at normal operating temper-
ature by operating the machine for approximately 10
minutes.
2. Lower cutting unit, engage parking brake and stop the
engine.
3. Install a 5,000 PSI (350 Bar) pressure gauge with
1
Figure 14
quick connect adapter on the test port.
1. Test Port
4. Start the engine and move the throttle control all the
way forward. Pull back on the lift lever until the imple-
ment is fully raised. Continue holding the lift lever back
to cause the relief valve to open, then read the gauge.
NOTE: Normal location for adjusting implement relief
pressure is on the top of the IHT. If the machine is
equipped with Model 30726 Hydraulic Kit, the original
valve is permanently closed, and a new implement relief
valve is installed in the hydraulic manifold. If the addi-
tional valve is present, adjust relief pressure at the new
location only.
1
Figure 15
1. Implement relief valve (standard)
1
Figure 16
1. Implement relief valve (Port R1)
(Model 30726 Hydraulic Kit)
Hydraulic System
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Groundsmaster 3000/3000–D