Easy
15-30 minutes
It is a high-quality OEM item which is made for Husqvarna and Jonsered chainsaws. The piston is secured inside the cylinder in order to create pressure and push the oil. Over time due to friction and heat, it may wear out or even get damaged eventually requiring a replacement to maintain a properly working oil pump. Note, never use waste oil. This results in damage to the oil pump, the bar, and the chain. It is also important to use oil of the right grade (suitable viscosity range) in accordance with the air temperature. Make sure to refer to the owners manual and the appropriate diagrams of your model for the correct installation of the new part. You will need to use appropriate tools in order to remove the chain, the bar, and the sprocket in order to perform this repair. This pump piston is made of durable materials and is sold as an individual component. Keep in mind, other parts of the oiler mechanism are all sold separately.
Pump Piston 540057901
OEM part for: Husqvarna, Jonsered
Part Number: 540057901
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Frequently Purchased Together ?
Compatibility
This part will fit the following 75 machines
Husqvarna
Jonsered
This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
- Pruner Parts
This part replaces obsolete part #: 503932101
Customer Part Reviews ?
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Questions & Answers ?
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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
Chainsaw oil pump and pinion stripped
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set, Piston plug, hammer, flat cold chisel
Parts Used
1.Removed top cover of motor
2.Removed spark plug
3.Removed bar and chain side cover, and removed bar and chain
4.Used a piece of 0.375” rope, pushed inside of spark plug hole to keep piston from cycling.
5. Take hammer and flat cold chisel and knock clutch loose.
6. Remove clutch, sprocket, needle bearings, pinion.
7. Use screw driver to remove deflection plate.
8. Remove oil pump
9. Reassemble with new parts in reverse order.
Oiler on chainsaw not working
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
Husq 445e - chain continued to spin at idle - pinion galled to crankshaft
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Installed replacement parts and re-assembled saw.
oiler not working
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Nutdriver
Parts Used
Oil pump not functioning, nylon pump gear was stripped. Replaced pinion also due to wear.
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Nutdriver, Torx bit
Parts Used
Also cleaned everything of debris before reassembly of the unit.
The ereplacement parts worked flawlessly, thank you.
No oil coming through to lube chain
Tool Type
Chain Saw
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver
Parts Used
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
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.
