© 2019 Pierce Manufacturing Inc. All Rights Reserved. Pierce Pumper / 3-41
OPERATION
After Operation
3-18. Ending Water Flow Operation
3-18.1 Shutting Off Water Flow
1. Reduce engine speed to IDLE.
2. Close discharge valves.
Close all discharge and inlet valves slowly to prevent water hammer.
3. Disengage the pump.
For driveline driven pump:
•See “Pump Disengagement (Driveline Driven Pump)” on page 3-13.
• For PTO-driven pump:
•See “Disengaging the Pump - PTO Driven Pump (Stationary Operation)” on page 3-17 or “Disengaging the
Pump - PTO Driven Pump (Pump and Roll Operation)” on page 3-17.
3-19. Securing Pump System
The pumping system should be drained during cold weather. See “Draining the Pumping System” on
page 4-2 for additional information.
Securing Pump System
1. Open drain valves and bleed valves.
Open all pressure release valves to vent any trapped air pressure and water.
2. Open nozzles.
Relieve pressure from un-gated inlet hose by opening discharge nozzles.
3. Remove hose.
Remove all hoses from discharge and intake lines.
4. Replace caps.
Install caps on intake and discharge connections to protect from contamination.
5. Flush pump.
Flush the priming system with clean, fresh water if required.
6. Purge primer.
If equipped with a fluid-lubricated primer pump, operate the primer pump until primer fluid comes out of the
primer pump discharge. Check primer fluid tank level, and fill if needed.
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