Hale MBP Booster - Manual (Page 59)

❑ Troubleshooting
58 Silencer Series Booster Pump, p/n: 029-0020-83-0
ENGINE SPEEDS
TOO HIGH FOR
REQUIRED
CAPACITY OR
PRESSURE -
continued 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 44.
• 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 6 Repair, heading
“Servicing the Booster Pump” on page 69.
Impeller blockage • A blocked impeller can prevent loss of both capacity and
pressure.
• 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 approach-
ing “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 heading “Cavitation” on page 36.
CAVITATION
(Pump beginning
to cavitate.)
Note: Also see
heading “Cavita-
tion” on page 36.
Chart continued on
next page.
Discharging more
water than the pump
is taking in • Increase the flow into the pump with more and/or larger intake
lines.
• Gate the discharge valves to reduce flow and maintain pressure.
Air leak • Verify that the air bleeder on the suction tube is NOT open.
• Locate and eliminate all air leaks during maintenance.
Drafting too high • Verify lift hose, hose friction, water temperature and other lift limit-
ing factors are reduced or eliminated.
• Locate the pump closer to the water source.
Water temperature
too high • Reduce volume discharge by lowering the RPM or gating the dis-
charge valves.
• Locate a source of cooler water.
Condition
Possible
Cause
Suggested Corrective Action
Figure 5-2: Troubleshooting Charts