Waterous 500-100-P, Руководство по эксплуатации

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Waterous Arizona Operations 500-100 & 120-P Operations Rev 1
Page 21 of 30
Observed
Symptom
Probable
Cause
Suggested Remedy
Pump fails to prime or
loses prime (cont'd)
Defective priming valve
A worn or damaged priming valve may leak and cause pump to lose prime.
Consult primer Instructions for priming valve repair.
Improper clearance in
rotary gear or vane
primer
After prolonged service, wear may increase primer clearance and reduce
efficiency.
Refer to primer Instructions for adjusting primer clearance.
Engine speed too low
Refer to Instructions supplied with primer for correct priming speeds. Speeds
much higher than those recommended do not accelerate priming, and
may actually damage priming pump.
Bypass line open
If a bypass line Is installed between the pump discharge and water tank to
prevent pump from overheating with all discharge valves closed, look
for a check valve In the line. If valve Is stuck open, clean it, replace it or
temporarily block off line until a now valve can be obtained.
Lift too high
Do not attempt lifts exceeding 22 feet (6.7m) except at low altitudes and with
equipment In new condition.
End of Intake hose not
submerged deep
enough
Although Intake hose might be immersed enough for priming, pumping
large volumes of water may produce whirlpools, which will allow air to
be drawn into intake hose.
Whenever possible, place end of Intake hose at least two feet below water
source.
High point In Intake line
If possible, avoid placing any part of Intake hose higher than pump inlet. If
high point cannot be prevented, close discharge valve as soon as
pressure drops, and prime again. This procedure will usually eliminate
air pockets in intake line, but it may have to be repeated several times.
Primer not operated long
enough
Refer to Instructions supplied with primer for required priming time. The
maximum time for priming should not exceed 45 seconds for lifts up to
10 feet (3.0m).
Insufficient capacity
A. Engine and
pump speed too
low at full throttle
(continued)
Insufficient engine power
Engine requires maintenance.
Check engine in accordance with manufacturer's instructions supplied with
truck.
Engine operated at high altitudes and/or high air temperatures. Engine
power decreases with an Increase In altitude or air temperature, except
for turbo charged engines.
Adjusting carburetor or changing carburetor jets (or Injector nozzles) may
Improve engine performance. Consult with engine manufacturer.
Discharge relief valve set
Improperly
If relief valve Is set to relieve below desired operating pressure, water will
bypass and reduce capacity. Adjust relief valve In accordance with
instructions supplied with valve.
Insufficient capacity
A. Engine and pump
speed too low at full
throttle
(continued)
Transfer valve set
Improperly
(Does not apply to single
stage pumps.)
Place transfer valve in VOLUME (parallel) position when pumping more than
two thirds rated capacity.
When shifting transfer valve, make sure It travels all the way Into new
position. Failure of transfer valve to move completely into new position
will seriously impair pump efficiency.
Truck transmission In too
high a gear
Consult vehicle instructions for correct pump gear. Pump usually works best
with transmission in direct drive.
If truck Is equipped with an automatic transmission, be sure transmission Is
In pumping gear.