Hale SMR - Manual (Page 45)

Stainless Max Series Pumps 3-11
Operating Procedures
12. Open the engine throttle gradually until the desired pressure or
flow is reached. As the throttle is opened, the discharge pres-
sure gauge reading increases with the engine speed. If the
engine speed increases without an increase in pressure, the
pump may be cavitating.
Note: Cavitation is discussed in detail under heading “Cavitation,”
beginning on page 3-13.
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.
WARNING!
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” beginning on page
3-12.
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. See the heading “Post
Operation Procedure” on page 3-16.
PUMP AND ROLL OPERATION
During pump and roll operation, it is necessary to slow the forward
motion of the apparatus to the PTO manufacturer's recommended
engagement speed.
The following outlines a general pump and roll procedure:
1. Slow the apparatus to a safe PTO engagement speed as recom-
mended by the PTO manufacturer.