Question about McCulloch Garden
Most often there is a dust-oil clog in the bottom of the bar slot which closes an oil passage between the bar slot and the hole drilled half way through the side of the bar. This provides a passage between the thin shim plate with the two bar bolt holes beside the bar and through to the oil tank or pump output. You can remove the bar and chain and punch out the blockage in the bar with a paper clip if the chain is removed. Make sure the wire can be pushed from the bar slot right through the side hole in the bar. A gravity feed chainsaw should leak right out into the slot of the shim plate, a button pumper should squirt out there with the bar removed. With a button pumper you may have a tiny check valve in the line or the push button to take apart, replace the spring or unstick the ball inside the check valve. This is why they went to the gravity feed oil system which just leaks in there and gets picked up by the bottom of the links as the chain races past the passage between the bar side hole and the chain slot.
Posted on Mar 24, 2011
Testimonial: "I checked as you suggested and I removed the pump from the crank shaft and the plastic gear is stripped. Now I can not find a pump. Thanks Jim"
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Posted on Jan 02, 2017
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