Hale Q Series Muscle - Manual (Page 98)

 Troubleshooting
98 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Engine Speeds
Too HIGH for
Required Capacity
or Pressure. Truck transmission in
wrong gear or range. • Recheck the pumping procedures for the recommended transmis-
sion or gear range - review Section 4 “Basic Operation,” beginning
on page 53.
• Check truck manual for proper speed counter ration.
Lift too high, suction
hose too small. • Higher than normal lift (10 ft./3.1m)) causes higher engine
speeds, high vacuum and rough operation.
• Use larger suction hose.
• Move the pump closer to the water source.
Faulty suction hose • Inner line of suction hose may collapse when drafting and is usu-
ally undetectable.
• Try a different suction hose on the same pump.
• Test for comparison against original hose.
Blockage at suction
hose entry • Clean suction hose strainer of obstruction. See Section 4 Preven-
tive Maintenance, heading “Intake Strainers” on page 75.
• Follow recommended practices for laying suction hose.
• Keep off the bottom of the fluid supply by at least 2 feet (0.6
meters) below the surface of the fluid.
Worn pump impel-
ler(s) or clearance
rings • Repair and/or replace as needed. See Section “Repair and Cor-
rective Maintenance” on page 103.
Impeller blockage • A blocked impeller can prevent loss of both capacity and pres-
sure.
• Back flushing the pump from discharge to suction may free the
blockage.
• Removing half the pump body may be necessary - this is consid-
ered a major repair.
Pump is approaching
“Cavitation” • Gate the discharge valves to allow pressure to increase. This
reduces the flow.
• Reduce the throttle opening to the original pressure setting.
• Also see “Cavitation” on page 193.
Table 6-1: Muscle (Midship) Pump Troubleshooting (Sheet 6 of 9)
Condition Possible Cause Suggested Corrective Action