This is an authentic Husqvarna replacement part that has been sourced from the original manufacturer to be used with chainsaws. The worm gear is used to rotate the oil pump piston as the clutch spins. This item is available as an individual replacement part.
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★★★★★
★★★★★
Excellent
Excellent =ƒæî
Guest - February 11, 2023
Verified Purchase
★★★★★
★★★★★
Worm gear for chain saw
No body had part in store ... took a long time to receive from on line but was received first from here .... ordered 3 from different places one still not received one month later .... crazy .... thanks
Guest - May 21, 2020
Verified Purchase
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Took the bar and chain off, removed the clutch, and sprocket. Took out the Oiler pump assembly, drained, and thoroughly cleaned the oil tank. Reinstalled all the new parts, leak fixed. Runs great
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The chain oiler pump was defective on my 450 20 inch Husqvarna chainsaw
1 Pull spark plug and stuff a nylon rope into the cylinder to remove the clutch assembly.
2 Get a wrench or spanner type tool and place it in the clutch and rotate it clock wise until it the ads off the shaft ( The rope you cramped cyl stops the piston from moving )
3 REMOVE THE clutch asst. And the cover exposing the pump
... Read more 4 REMOVE the old parts clean and inspect for blockage pre oil the new pump parts re install the cover then the clutch assy. fill the oiler with bar oil
5 Before installing the chain and bar start the saw and check to see if the oil is coming out.if so put the bar and chain on and get to cutting, oh yeah
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General wear & tear of clutch drive and chain drive area..
1. Remove chain and bar.
2. Remove spark plug and insert short length of rope (enough to stop the piston from completing a stroke) leaving enough to grip for removal latter.
3. Place punch on outer portion of clutch assembly but inside the clutch drum and strike with hammer to loosen/unscrew clutch (counter-clockwise).
... Read more4. Remove clutch, drum and worm gear assemblies.
5. Install new parts in reverse order they were removed.
6. On Cover use screwdriver to remove screw on worn cover lid, remove and replace.
Notes: Use safety glasses if using compressed air to blow off debris, disposable gloves are recommended, and remove rope from cylinder before replacing spark plug (it was only used to keep the piston from reaching top of stroke so that the clutch assembly could be unscrewed and screwed back on).
removed chain guard, chain & chain bar, clutch, pin bearing sleeve, oil hose & any part that has been chaffed. cleaned out saw dust/oil build ups.replaced parts where needed.installed chain & bar. adjusted to. proper tension. lubed internal parts on the rebuild. gapped new spark plug & replaced. put in 50:1 gas mix & bar oil.
star
... Read moreted up saw & checked bar oil spray on a piece of cardboard. good as new !!
The parts were used to repair the oil leak on a Husqvarna 440e chainsaw. These saws are notorious for their oil leaks. Your parts arrived quickly and were very useful. I highly recommend your services.
Took the chain and bar off the saw.
Removed the drive sprocket/ clutch assembly.
Removed the oil pump drive.
Cleaned all parts and reassembled.
Tested saw and got ready to cut firewood
To remove the clutch assembly, I had to take the spark plug out and put about 3 inches of starter rope in the cylinde
... Read morer to lock the piston in place.
I used a hammer and punch to spin the clutch off the crankshaft. (left hand threads)
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Model Cross Reference
This part works with the following models:
ERP Number: ERP9029571
Manufacturer Part Number: 544212402
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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_WW_3.gif "Part Location Diagram of 544212402 Husqvarna Worm Gear Assembly")
_WW_3.gif "Part Location Diagram of 544212402 Husqvarna Worm Gear Assembly")
