yellow jacket 93600, Operation And Maintenance Manual

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8
Diagnostics Chart
Condition Pump Area Possible Problem Solution
Poor
Vacuum
Quiet pump
Dirty oil
Drive coupling or set screw loose
Bent or broken exhaust valve
Pump not oiling
Vanes not functioning Flush 1 to 3 times
Repair or replace
Repair or replace
Call factory
Call factory
Ultimate of pump
does not meet
mfg. spec (when
read with thermo-
couple gauge)
Pump dropped
Micron gauge malfunction
Poor motor performance
Dirty oil
Air leaks
System leaks
Fitting sealant compound Call factory
Verify with second gauge
Repair or replace
Flush 1 to 3 times
Repair or replace
Isolate/repair
Repair or replace
Oil Leaks
Exhaust
Oil level high
System vented pressure through
pump
Pump tipped over
Adjust oil level
Check oil level, add or
replace oil
Check oil level, add or
replace oil
Seal
Worn or damaged seal
Motor loose Replace
Adjust/tighten, check seal
Case
Gasket bolts loose
Oil drain fitting
Gasket damaged Tighten
Repair or replace
Replace
Pump
Won’t Start Motor stalled
hot/cold
Damaged motor
Damaged pump
Closed intake on pumps
Low voltage
Cold weather cut-out Repair or replace
Replace/call factory
Open intake fitting
Shorter extension cord
Open intake fitting for 10-15
sec. to warm up while starting
Poor
Vacuum
Noisy pump
System leaks
Low oil level
Dirty oil
Worn pump
Air leaks and fittings or gasket
seals
Repair leaks
Add/replace
Flush 1 to 3 times
Replace module, call factory
Replace/repair