Lesson 2/Learning Event 1
operation services on the pump unit.
Check that the gages and tachometer work and are reading correctly:
Vacuum Gage: 0 - 15 inches
Do not operate the pump for more than two minutes with a 0
pressure indication. If more time is needed to correct the fault
Step 3. Check the engine for oil leaks. Check for unusual noises or any
abnormal operation during the idling period. The engine should be crisp and
evenly timed Observe the engine exhaust for unusual or excessive smoke. See
that the engine responds smoothly to the throttle.
Check for leaks in the pump pipes, and valves.
Step 5. Check that the prime-detergent tank has liquid in it while valve
No. 4 is open. Close valve No. 4 after the pump is primed and operating.
Step 6. Check
that no leakage occurs when
the gun assembly
is turned off
Check that the nozzles work without leaks.
motors are working.
filter, piping, valves, and hose connections while operating the heater
control switch in the PURGE-ON mode. Shut down if leak is found and repair
it, if possible.