Hale RSD - Manual (Page 60)

❑ Troubleshooting
60 Troubleshooting
Hale Series Pumps, Nov.-05, Rev-A
Pump Loses Prime
or Will Not Prime -
continued.
Chart continued on
next page.
Inoperative priming
system or possible
clogged priming pump
- continued. • Check the priming system by performing a “Dry Vacuum Test” per
NFPA standards. If the pump holds vacuum, but primer pulls less
than 22” Hg., it could indicate excessive wear in the primmer.
• See Section 4 Preventive Maintenance, heading “Weekly” on
page 46. Also see Section 4 Preventive Maintenance, heading
“Annual” on page 52.
• See Section 2a, heading “Priming Valves” on page 25.
• Repair and/or replace accordingly.
Note: Using lubricant on the vanes and vane slots during disassembly and
cleaning eventually causes a gummy residue to develop, rendering the sys-
tem inoperative.
Suction lifts too high. • DO NOT attempt lifts exceeding 22’ (6.7 meters) except at low
elevation.
Blocked or restricted
suction strainer. • Remove obstruction from suction hose strainer.
• Thoroughly clean strainer screen.
Suction connections. • Clean and tighten all suction connections.
• Check suction hose and hose gaskets for possible defects - repair
and/or replace.
Air trapped in suction
line. • Avoid placing any part of the suction hose higher than the suction
intake.
• Suction hose should be laid out with continuos decline to fluid
supply.
• If trap in hose in unavoidable, repeated priming may be needed to
eliminate air pockets in suction hose.
Insufficient priming. • Proper priming procedures should be followed.
• Do not release the primer control before assuring a complete
prime.
• Open the discharge valve slowly during completion of prime to
ensure complete prime.
NOTICE !
DO NOT RUN THE PRIMER OVER FORTH-FIVE (45) SECONDS. IF PRIME IS
NOT ACHIEVED WITHIN 45 SECONDS, STOP AND LOOK FOR CAUSES
(AIR LEAKS OR BLOCKED SUCTION HOSES).
Pump pressure too
low when nozzle is
opened. • Prime pump again and maintain higher pump pressure while
opening the discharge valve slowly.
Condition
Possible
Cause
Suggested Corrective Action
Figure 5-2: Troubleshooting Chart