Once charge pressure has been established, increase
speed to normal operating RPM. Charge pressure
should be at 190-210 PSI minimum. If charge pressure
The hydraulic fluids used with Sundstrand products
is not at proper value, shut down and determine cause
should be carefully selected following the guidelines
(Ref: Troubleshooting Section).
presented in the "Hydraulic Fluid Requirements" bulletin,
F-00.01 and in the original equipment manufacturer's
Shut down prime mover and connect external control
linkage. Start prime mover, checking to be certain
pump remains in neutral. With prime mover at normal
Start Up Procedure
operating speed, slowly check for forward and reverse
Prior to installing both pump and motor, inspect the units
for damage incurred during shipping and handling.
Make certain all system components (reservoir, hoses,
valves, fittings, etc.) are clean prior to filling with fluid.
Take necessary safety precautions
before moving machine.
Fill the reservoir with recommended hydraulic fluid
which should be passed through a 10 micron (nominal
Charge pressure should remain at 160-180 PSI
no bypass) filter prior to entering the reservoir. Never
minimum during forward or reverse operation. Continue
to cycle slowly from forward to reverse for five (5)
The inlet line leading from the reservoir to the pump
must be filled prior to start up. Check inlet line for
Shut down prime mover, remove gauges and plug ports.
properly tightened fittings and make sure it is free of
Check reservoir level and add fluid if necessary.
restrictions and air leaks.
The transmission is now ready for operation.
Be certain to fill the main pump and motor housing with
clean hydraulic fluid prior to start up by pouring filtered
System Maintenance For satisfactory service, regular
oil in the uppermost case drain port.
maintenance of fluid and filters must be performed. The
following are recommended intervals for changing these
Install a pressure gauge (500 PSI) in the Charge
Pressure Gauge Port (Ref: Troubleshooting Section). It
is recommended the external control linkage be left
Air Breathing Type Reservoir
disconnected until after initial start up to allow pump to
remain in neutral.
Check fluid level daily. Change fluid more often if it
becomes contaminated with any foreign matter (dirt,
Start the prime mover and run at lowest possible RPM
water, grease, etc.).
until charge Pressure has been established. Air can be
bled from the high pressure lines by using the high
Change inlet filter whenever fluid is changed and
pressure gauge ports on the motor manifold.
whenever filter indicator shows a change is necessary.
Replace all fluid lost during filter change.
Do not start prime mover unless
pump is in neutral (0 swashplate
angle). Take safety precautions to
prevent machine movement in case
pump is actuated during initial start