This authentic manufacturer-sourced pinion worm gear is designed for use with Husqvarna chainsaws. As a key component of the oiler pump assembly, it plays an essential role in maintaining proper chain lubrication. This gear is compatible with spur-style drive sprockets and is made from durable plastic for reliable performance. It is sold individually.
To complete this repair, you’ll need a screwdriver, a set of wrenches, and pliers. For proper installation and to ensure compatibility, please refer to your chainsaw’s model-specific diagrams.
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★★★★★
★★★★★
Easy repair
The part fit and works perfectly. Here is a trick for getting the clutch off the shaft. Take the spark plug out and with the piston down, shove part of a small rope into the cylinder through the spark plug hole. This will allow you to keep the shaft from turning so you can break the clutch free, spin it off so you can get to the pinion.
Guest - September 17, 2019
Verified Purchase
★★★★★
★★★★★
Perfect Parts
The chain saw parts were right and good quality, shipping was fast. Excellent customer service. I will buy from eReplacementParts again.
Mary - March 11, 2020
Verified Purchase
★★★★★
★★★★★
Easy repair
It's nice to have oil going to my bar
Guest - May 7, 2020
Verified Purchase
★★★★★
★★★★★
This part work great.had no issues with it so far.
The part was in great condition on arrival . Looked exactly the same as the old part . But in better condition...
Guest - October 12, 2022
Verified Purchase
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.
Easy
30 - 60 mins
(6 rated repairs)?
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Sorry, we couldn't find any existing installation instruction that matched.
First empty oil from reservoir. Disengage clutch top bar so one can remove cover. Remove 2 nuts that hold cover on. Remove cover. Remove chain and bar. Remove spark plug. Screw in piston stop. Place clutch removal socket on ratchet. Rotate clockwise to remove then spin off clutch don\\\'t lose needle bearing on clutch shaft. Use Alle
... Read moren wrench to remove 1 screw that holds on pump. Remove hose if you want to replace hose to reservoir. Remember carrying handle and flip over saw and use pliers to grab hose and remove from base of reservoir. Reverse process to install necessary parts. Time needed. 45 minutes
Replaced both the oil line from the reservoir to the pump and the oil line from the pump to the bar, the pinion gear, oil pump and put loctite 518 on all connections. That stopped the leaking.
Remove clutch assemble, and plate, ( clutch will be left handed theards ). Pull the needle bearing, change out Oiler pinion, make sure it is lined up to your Oiler gear. Function by hand to make sure that itÆs working the oil pump. Put plate, needle bearing and clutch back together.
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Bar on my chainsaw was not getting any oil while operating
Removed bar and chain. Removed clutch and sprocket. Removed cover plate protecting oiler.
replaced pinion, then replaced cover plate, then put the sprocket and clutch back on.
then installed bar and chain. Adjusted tension on chain.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP17016377
Manufacturer Part Number: 598718301
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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