Hale MG - Manual (Page 39)

Muscle Pumps
2-5
DO NOT LEAVE THE CAB OR ATTEMPT TO
PUMP UNTIL ALL THE GREEN PUMP
LIGHTS IN THE CAB AND PANEL ARE ON.
7. Exit the driving compartment only after all the
above steps are completed and you are sure
that the shift completed warning lights in the
cab and panel are on.
DO NOT OPEN THROTTLE UNLESS ALL
GREEN PUMP INDICATOR LIGHTS ARE ON.
8. Verify that the pump panel shift indicator light
is on.
9. Open the tank suction valve.
10. For two-stage pumps, select the desired
transfer valve position.
11. Check the master discharge gauge to see if
priming is necessary. If necessary, start the
priming pump by pulling the control handle
located on the pump panel or depressing the
prime push button or just crack the tank fill
valve.
IF THE DISCHARGE GAUGE READING DOES
NOT INCREASE, THE INTAKE GAUGE
READING DOES NOT FALL BELOW ZERO, OR
THE PRIMING PUMP DOES NOT DISCHARGE
WATER ON THE GROUND IN 30 SECONDS, DO
NOT CONTINUE TO RUN THE PRIMING PUMP.
STOP THE PUMP, AND CHECK FOR AIR
LEAKS OR POSSIBLE PUMP TROUBLE.
Watch the intake and discharge pressure gauges.
When the pump is primed, the compound gauge
indication falls below zero, and the pressure starts
to increase. You may also hear water splashing on
the ground, indicating that the pump is primed.
12. Open the engine throttle gradually until the
desired pressure or flow is reached. As the
throttle is opened, the discharge pressure gauge
reading increases with the engine speed. If the
engine speed increases without an increase in
pressure, the pump may be cavitating.
If the pump is cavitating, warn personnel that the
pressure is being dropped. In this case, close the
throttle slowly until the pressure begins to drop,
and the engine returns to an idle. If this does not
correct the problem, reduce flow.
DO NOT OPEN THROTTLE UNLESS ALL
GREEN PUMP INDICATOR LIGHTS ARE ON.
13. Gradually open the discharge valves until the
water emerges as a steady stream. Then open
the discharge valves to the desired setting.
14. Set the automatic relief valve according to
your fire department policy. If your fire
department does not have a policy to follow,
see the “TPM or Relief Valve Procedures”
later in this section.
15. If the pump overheats and is not equipped with
the Hale TRV valve, open the valve to access
the pump auxiliary cooling system, or slightly
open the tank fill line.
16. After completion of pumping procedures,
gradually reduce the engine RPM until it is at
an idle speed. Use the “Pump to Road Shift
Procedure” and “Post Operation Procedure”
provided later in this section.
Pumping In Relay
Relay operations are necessary when the water
source is too far away from the fire to be pumped
efficiently by one pumper. Relay pumping is the
movement of water through a number of
consecutive pumpers, from suction to discharge.
The number of pumpers is determined by how far
the water source is from the fire.
In some cases, when you are on the receiving end
of a relay, it may help to set the suction dump or