DRAFT
TM 5-4210-249-13&P-2
FIELD LEVEL MAINTENANCE
PRESSURE GOVERNOR ADJUSTMENT
INITIAL SETUP:
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Tools and Special Tools
Equipment Conditions
Tool Kit, General Mechanic's: Automotive
Engine OFF (TM 9-2320-347-10)
(WP 0622, Item 27)
Wheels chocked (TM 9-2320-347-10)
Pump operator's panel cover opened (WP 0019)
NOTE
There are three parameters that can be adjusted to control pressure governor operations.
They are RAMP, GAIN, and SENSITIVITY.
RAMP adjusts the change in voltage when the INC (increase) or DEC (decrease)
switch is pressed.
GAIN adjusts how quickly the voltage will change independently, in response to a
pressure change or when the present switch is being used. To slow the response
time, decrease the value.
SENSITIVITY adjusts how much pressure variance is allowed before the governor
will respond. The present value of "5" allows for approximately 5 psi variance
before the governor will adjust back to the set pressure. Rarely should this value
ever exceed "7". The higher the value, the greater the variance in pressure.
NOTE
The governor control panel comes from the factory with all three of these parameters set
at "5". These parameters are reset by Pierce Manufacturing as follows:
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Table 1.
Personnel Cab Governor Control
RAMP
6
GAIN
6
SENSITIVITY
5
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Table 2.
Pump Operator's Panel Governor Control
RAMP
3
GAIN
7
SENSITIVITY
5
NOTE
Personnel cab and pump operator's panel governor controls are adjusted the same way.
Pump operator's panel governor control shown.
