Figure 2-87. Governor Control Module Adjustment With Cover Removed

Figure 2-86. Governor Control Module Cover Removal.

Governor Control Module Maintenance, Unit 609-C. (Continued)

TM-10-4320-344-24 Pump Assembly Water 600 GPM Model 609-A (NSN 4320-01-184-7494) Model 609-C (NSN 4320-01-261-6470) Model US636HCCD-1 Manual
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TM 10-4320-344-24 (5) (6) (7) (8) (9) e . f . g . h. Figure 2-87. Governor Control Module Adjustment With Cover Removed. If system is unstable (oscillates), slightly reduce the I and GAIN settings u n t i l o s c i l l a t i o n s t o p s . Turn AUTO THROTTLE rheostat (Figure 2-86, 8) to the IDLE position. Slowly turn the GAIN adjustment clockwise (CW) until the governor actuator lever begins to oscillate, then turn back until oscillation stops. Upset the governor actuator lever by hand and note how many oscillations it takes for the lever to again stabilize. If no more than 5 oscillations are required, adjustment is correct. If adjustment is not correct (3-5 oscillations in step 8 above) reduce GAIN setting counter–clockwise (CCW) one division and while observing the actuator lever turn the I adjustment CW until the governor actuator lever o s c i l l a t e s. If the governor actuator lever does not become unstable, upset it by hand. When the governor actuator lever oscillates, slowly turn the I adjustment CCW until the lever is stable. Upset the governor actuator lever again, it should oscillate 3 to 5 times and then become stable. If unit cannot be adjusted, replace governor control module with another governor control module. 2-215

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