Author Topic: 371xp Oiler question  (Read 976 times)

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Offline KilliansRedLeo

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Re: 371xp Oiler question
« on: April 23, 2014, 11:38:26 am »
Your third picture clearly shows the sleeve in its' proper position, the sleeve just slips inside the seal, underneath it is the o-ring mentioned in my earlier post. The washer you are missing slips down over the sleeve and rests against the seal. It is there to keep the rotating pump drive from chewing up the outer lip of the seal and to keep the drive fully engaged with the pump piston. On the 365/372 series of saws the oil pump is driven off the clutch drum not the crank shaft. E.g. the pump drive just spins freely on the bushing when the clutch engages.

In your second picture you can see the pump shaft with splines that engage the outer threads on the plastic pump drive wheel. If the washer you are missing is not there the pump drive wheel will sometimes go in too far and not engage the splines enough to drive the pump efficiently.

Lastly take your pump drive and lay it across the notches in your clutch drum to make sure that the ears on the drive protrude a tiny amount past the notches in the drum. Sometimes people put the drum on without engaging the drive in the clutch drum causing premature wear on the drive.

Sorry, I missed one of your questions. You should have to unscrew the pump drive from the shaft. What you are really doing is disengaging the pump drive from the pump shaft. The threads of the pump drive should be centered over the pump shaft equidistant from either end of the threads on the drive wheel.
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