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Forward Traction Test
NOTE: See Sauer–Sundstrand IHT Service Manual for
more information.
Use a 10,000 PSI (700 Bar) gauge.
Specification: 6,200 PSI (428 Bar) maximum
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. Remove the plug from the forward traction pressure
port and install a 10,000 PSI (700 Bar) pressure gauge
with extension hose.
4. On 4WD machines, raise the implement and engage
the transport switch so the IHT operates with less torque
to the wheels. Engage the parking brake, and run the en-
gine at full speed. Slowly push the traction pedal forward
and listen for engagement of the easy ride valve. Contin-
ue to push the traction pedal and read the gauge.
NOTE: When you move the traction pedal to create
pressure, move it a short distance first and wait for a
change in sound before moving the pedal further. The
change in sound indicates that the easy ride valve has
closed.
1
Figure 12
1. Forward traction pressure port
Reverse Traction Test
NOTE: See Sauer–Sundstrand IHT Service Manual for
more information.
Use a 10,000 PSI (700 Bar) gauge.
Specification: 5,000 PSI (345 Bar) maximum
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. Remove the plug from the reverse traction pressure
port and install a 10,000 PSI (700 Bar) pressure gauge
with extension hose.
4. On 4WD machines, raise the implement and engage
the transport switch so the IHT operates with less torque
to the wheels. Engage the parking brake, and run the en-
gine at full speed. Slowly push the traction pedal in re-
verse and listen for engagement of the easy ride valve.
Continue to push the traction pedal and read the gauge.
NOTE: When you move the traction pedal to create
pressure, move it a short distance first and wait for a
change in sound before moving the pedal further. The
change in sound indicates that the easy ride valve has
closed.
1
Figure 13
1. Reverse traction pressure port
Hydraulic System
and Transaxle
Groundsmaster 3000/3000–D
Page 5 – 13
Hydraulic System