Husky 350 Oil pump worm gear failure

jjmk98k · April 14, 2007, 08:39:44 PM

This morning, I was cutting up a few oak and ash boards when i noticed the saw was trying harder than usual.. the saw had a freshly sharpened chain.... and it looked kinda dry....I did the "oil spatter check" and saw NO oil was coming out....

So I disassembled that side of the saw and found the the oil pump worm gear had stripped ( its plastic)...Hum..... I degreased the oil pump and saw that it turns smoothly....

Cheap enought to get a new part, its only $5, but I want to know why it failed?

ideas?

arojay · April 14, 2007, 09:59:40 PM

I repaired an oil pump for a guy once who had been using Husqvarna summer oil in very cold weather.

jjmk98k · April 14, 2007, 10:20:50 PM

I was thinking something like that! One day when it was bitter cold I stated it up and cut a few boards... it was about 25 deg F and I still had the thick Husky oil in the tank, not my winter "blend"

joe_indi · April 15, 2007, 12:15:27 AM

Was it the thread on the worm that had stripped or was it the leg that engages the clutch drum?
The legs can wear off either due to a wrongly installed clutch drum or due to constant blipping of the throttle.
The thread can get stripped off due to a mometarily stuck pump pinion, usually from some grit in the oil.