HALE DSD, Operating And Maintenance Manual, Page: 43 / 84

CONDITION POSSIBLE CAUSE SUGGESTED CORRECTION
Automatic Transmission
With Power Shift System
(continued)
Insufficient air in shift system
Air leaks in shift system Repeat recommended shift procedures.
Check system for loss of air. Check of leak in
system. Employ manual override procedures
if necessary. See Standard Transmission with
Power Shift System.
Attempt to locate and repair leak(s). Leakage,
if external, may be detected audibly. Leakage
could be internal and not as easily detected.
DO NOT LEAVE THE CAB AFTER PUMP SHIFTING UNLESS THE SHIFT INDICATOR LIGHT
IS ON, OR A SPEEDOMETER READING IS NOTED.
CONDITION POSSIBLE CAUSE SUGGESTED CORRECTION
PUMP LOSES PRIME
OR IT WILL NOT
PRIME
NOTE: Weekly priming
pump operation is
recommended to provide
good operation.
Electric Priming System
Defective Priming System
Suction lifts too high
Blocked suction strainer
Suction connections
Primer not operated long
enough.
No recommended engine speed is required to
operate the electric primer, however, 1,000
engine RPM will maintain truck electrical
system while providing enough speed for
initial pumping operation
Check priming system by performing “Dry
Vacuum Test” per NFPA standards. If pump
is tight, but primer pulls less than 22 inches of
vacuum, it could indicate excessive wear in
the primer.
Do not attempt lifts exceeding 22 feet except
at low elevation.
Remove obstruction from suction hose
strainer.
Clean and tighten all suction connections.
Check suction hose and hose gaskets for
possible defects.
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 same.
NOTICE: Do not run the primer over 45
seconds. If prime is not achieved in 45
seconds, stop and look for causes (for
example, air leaks or blocked suction).