Section 7
Hydraulic System
20412971
8-2012/Rev 08
7-15
18. Verify that the mating surfaces of the motor and pump meet without resistance from the
coupling.
19. Replace the pump mounting bolts and torque to the specifications in Table 7-3, Torque
Specifications.
20. Install the recirculation pump, adapter and booster pump.
21. Install the hydraulic manifold ensuring that the o-ring is properly positioned. Torque the
mounting bolts to the specifications in Table 7-2.
22. Reconnect all hydraulic hoses, connections and electrical sensors.
23. Tighten the hold down screws on the proximity switches and torque to 140-160 in-lbs (16-
18 Nm).
Ensure that the proximity switches are properly installed and secured prior to
starting the motor. Failure to tighten the two hold down screws on each switch
will result in the spray of hydraulic oil.
24. Refill the hydraulic reservoir following the procedure, Hydraulic Oil Replacement.
25. Start the motor and apply full high pressure water pressure. Inspect for hydraulic leaks
and note any unusual sounds from the motor or pump assembly.
Table 7-2
Torque Specifications
30 HP 50 and 60 HP 100 HP
Pump mounting bolts 55 ft-lb (75 Nm) 110 ft-lb (149 Nm) 200 ft-lb (271 Nm)
Manifold mounting bolts 35 ft-lb (47 Nm) 35 ft-lb (47 Nm) 45 ft-lb (61 Nm)
Motor coupling half bolts 36 ft-lb (49 Nm) 36 ft-lb (49 Nm) 85 ft-lb (115 Nm)
Electric Motor Replacement
1. Complete Steps 1-10 in the previous procedure.
2. Open the junction box on the motor and remove all electrical leads. Loosen the lock nut,
disconnect and remove the flexible electrical cable from the junction box.
3. Remove the bolts attaching the motor to the vibration isolation mounts and remove the old
motor from the frame.
4. Stand the new motor on the fan cowl with the shaft pointing upward.
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