Filter Pump Fails To Pump Oil
Filter pump fails to pump oil.
If filter unit has a heater, turn heater ON and allow to heat for 20 minutes.
Disconnect flexible oil return
hose. Make sure it is cool before handling. Try blowing air through the hose.
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| Submerge hose in very hot water, |
Can you blow |
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| keeping the water out of the hose. |
No |
| Water in the hose will cause severe | |
air through it? |
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| splattering when hot oil is circulated | |
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| through the hose. |
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Yes
Insert flexible oil return hose into filter pan and turn pump motor ON.
Once shortening has had time 
to soften, reconnect hose to
filter pump.
Blockage is between bottom of the filter
pan and the flexible hose quick
Does oil flow through oil No 
disconnect. Go to "Blockage Between return hose?
Filter Pan and Flex Hose Valve.
Yes
Proceed with normal
operations.