PROPEL TRANSMISSION
SUBSECTION 9B
12. Start the engine and run it at 1500 rpm.
4. Place the propel brake switch in the ON position to set
the propel brakes.
5. Install pressure gauges (10,000 psi) at gauge port C on
the pressure override valves of both pumps.
Bring the pump on stroke with extreme cau-
tion since no reliefs other than the pressure
6. Loosen locknuts A on the pressure override valves and
override valves are in the system.
back out setscrews B three to five turns on both pumps
7. Disconnect the signal wires from the controller on the
13. Slowly bring the pump being adjusted on stroke by
pump which is not being adjusted and tape the ends of the
turning the manual actuator on the controller. Watch the
wires.
pressure gauge installed in port C and return the pump to
neutral if the pressure exceeds 5000 psi.
8. Start the engine and run it at 1500 rpm.
14. With the engine running and the pump on stroke,
9. Bring the pump to be adjusted on stroke by turning the
slowly turn setscrew B on the override valve in until the
mechanical actuator on the controller.
pressure gauge installed in port C reads 5500 psi or 500 psi
10. While the pump IS on stroke, slowly turn setscrew B on
less than the main relief setting, whichever is less. Tighten
the pressure override valve in until the pressure gauge In-
locknut A. If the pressure reading fluctuates set the pres-
stalled in gauge port C reads approximately 2000 psi. Re-
sure at mid-range of the fluctuation.
turn the pump to the neutral stroke position and shut off the
15. Return the pump to neutral stroke, shut off the engine,
engine.
and connect the main lines to the motor. Connect the wires
11. Deadhead the flow from the pump pressure ports to the
to the controller of the other pump.
motor pressure ports. This must be done to provide a
16. Repeat steps 6 through 14 for the remaining pump.
resistance to flow necessary to develop the high pressure.
Figure 9B-33. Pressure Override Valve
9B-20
