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PTO PUMP SHIFTING PROCEDURE
required when the chassis transmission is in neutral and the parking brake is engaged, and
"Throttle Ready" indication for this condition is not required.
16.10.10.4 An interlock system shall be provided to prevent advancement of the engine
speed at the pump operator's panel unless the apparatus has "Throttle Ready" indication.
16.10.10.5 Loss of power to the interlock system in 16.10.10.4 shall return the engine
speed to idle and prevent advancement from the pump operator's panel.
16.10.11 Pump Operator's Panel Engine Speed Advancement – Manual
Transmission.
16.10.11.1 An engine speed control shall be provided at the pump operator's panel.
16.10.11.2 A "Throttle Ready" indicator that lights when the pump is in the "OK to
Pump" mode shall be provided on the pump operator's panel.
16.10.11.3* The "Throttle Ready" indicator at the pump operator's panel shall be
permitted to light when the parking brake is engaged.
A.16.10.11.3 Engine speed advancement control at the operator's panel might be
required for apparatus with the need to control the engine speed for operation of a
generator, aerial device, alternator, or other chassis engine-driven device. The indicating
device for this "Throttle Ready" condition is the same indicating device as in 16.10.11.2.
Other apparatus may not have equipment for which there is a need to control
engine speed from the pump operator's panel. Engine speed control at the pump
operator's panel for these apparatus may not be desirable since, on many chassis engines,
activating remote throttle operation will automatically disable the in-cab accelerator pedal.
For such apparatus, engine speed advancement control at the pump operator's panel is not
required when the chassis transmission is in neutral and the parking brake is engaged, and
"Throttle Ready" indication for this condition is not required.
16.10.11.4 Loss of power to the interlock system in 16.10.11.3 shall return the engine
speed to idle and prevent advancement from the pump operator's panel.
16.10.12 If a pump shift manual override device is provided the "Pump Engaged", "OK
to Pump", and "Throttle Ready" indicators and the pump operator's panel engine speed
advancement interlock system shall be operationally functional when the manual override
device is used to shift the pump.
16.10.13 Pump Operator's Panel Engine Speed Advancement – Automatic
Transmission.
16.10.13.1 With parallel/series centrifugal pumps, the control positions for parallel
operation (volume) and series operation (pressure) shall be indicated.
16.10.13.2 The control for changing the pump from series to parallel, and vice versa,
shall be operable at the pump operator's position.
Prepared by: DWS
Approved by: MCR
Revised by: RJG
3
1200590 Rev: # A
Date: 17Sep02
Revision Date: 04/09/12
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