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.
Worm Gear Assembly 536860001
OEM part for: Husqvarna, Craftsman, Jonsered
Part Number: 536860001
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Compatibility
This Worm Gear Assembly will fit the following 14 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
This part replaces obsolete part #: 5442124-01, 544212402, 544212401
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
The chain oiler pump was defective on my 450 20 inch Husqvarna chainsaw
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Everything is torx with an occasional phillips head screw
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
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
Leaking bar oil.
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Custom cut socket to remove the clutch.
inspect, clean,lube & replace worn parts
Tool Type
Chain Saw
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
started up saw & checked bar oil spray on a piece of cardboard. good as new !!
The parts from eReplacements were very useful
Tool Type
Chain Saw
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Thanks
Oiler on chainsaw not working
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
The chain would jam and lock up during use
Tool Type
Chain Saw
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Wrench Set
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 cylinder to lock the piston in place.
I used a hammer and punch to spin the clutch off the crankshaft. (left hand threads)
I had a melted worm gear due to overheating, so it was so di
Tool Type
Chain Saw
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Wrench Set
My chainsaw is good condition now.
General wear & tear of clutch drive and chain drive area..
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Hammer & punch plus a short length of rope
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).
4. 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).
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.