Oiler on 455 rancher

[davey_b]

I've got a husqvarna 455 rancher and it's stopped putting oil to the chain. I opened it up to night and looking at this exploded diagram (Husqvarna 455 Rancher Chainsaw (2012) Parts Diagram, Clutch & Oil Pump) there is a pinion that turns when the sprocket turns and that pinion turns a rod that pumps the oil. When I had it open and turned the oil pump piston (number 7 in the diagram) there was a bit of oil coming through (I'd emptied the oil before taking it apart, but the dregs looked like it was coming through). However when I put the pinion on and turned it it didn't seem to turn the pump piston. I wondered if it was just because it needed to be in a position that it was only in when it was assembled so I cleaned things and put it back together. It's still not pumping oil thought so was just wondering if anyone has seen this before and if so what they would advise?

 

Thanks

[spudulike]

I've got a husqvarna 455 rancher and it's stopped putting oil to the chain. I opened it up to night and looking at this exploded diagram (Husqvarna 455 Rancher Chainsaw (2012) Parts Diagram, Clutch & Oil Pump) there is a pinion that turns when the sprocket turns and that pinion turns a rod that pumps the oil. When I had it open and turned the oil pump piston (number 7 in the diagram) there was a bit of oil coming through (I'd emptied the oil before taking it apart, but the dregs looked like it was coming through). However when I put the pinion on and turned it it didn't seem to turn the pump piston. I wondered if it was just because it needed to be in a position that it was only in when it was assembled so I cleaned things and put it back together. It's still not pumping oil thought so was just wondering if anyone has seen this before and if so what they would advise?

 

Thanks

 

Pinions can look in good shape but still not work - closely inspect and make sure the tips of the pinion are not rounded and also check that the thread runs uninterupted - I had one once that was distorted and formed a loop on to the next thread rather than forming a continous spiral - hope that makes sense.

 

The pinion should sit on the crank shaft and should turn the oiler in this position - it is easy to overlook a bit of wear. Other common issues are a gunged up pick up filter and also a plugged pump.

[TommyW]

I had a bunch of ranchers - all of them had oiler issues - there is no filter on the out pipe from the tank so the pipe get gunked up with small debris, flush the tank with petrol as this is more viscous than chain oil, then get a good blow into the tank, you will see / feel the gunk pop out then the dregs of the fuel will drain quickly through your unblocked tank - you have to remove the sprocket etc and the oil pump from the end of the oil line to do all this.

[TommyW]

Then be really clean with your chainoil can in future