Medium
30-60 minutes
Pump Unloader Rebuild Kit 187879GS
OEM part for: Craftsman
Part Number: 187879GS
$38.64
In Stock
Order within the next 6 hours and your part ships today! 
Jump To:
Frequently Purchased Together ?
Compatibility
This Pump Unloader Rebuild Kit will fit the following 74 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Craftsman
Show More Compatible ModelsThis item works with the following types of products:
- Pressure Washer Parts
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
4
4 stars
0
3 stars
0
2 stars
1
1 stars
0
< PREV
- 1
pump rebuild kit
easy to order part. the part was the grade i expected. the part came earlier then expected date. I am very pleased with my experience. I will use you again when parts are needed. I will spread the word about my experience with you.
Guest -
October 9, 2023
Verified Purchase
Great part
Exactly what I needed!
Guest -
October 11, 2021
Verified Purchase
New life for old washer
Easy replacement and good quality part. Brought my 20 year old pressure washer back to life. The hardest part was cleaning out built up scale from years of use but the new part fit perfect and functioned perfect the first time.
Guest -
August 11, 2019
Verified Purchase
Pressure washer part
Perfect fit. The most difficult part of repairing, for me, is disassembly. After that is done and everything is cleaned putting in brand new parts is great. Like slipping your hands into well fitting gloves.
Theron -
June 29, 2019
Verified Purchase
Haven't been able to install parts. The old fiber insert had disintegrated and in digging the old part out, I damaged the threads on the main body of the pump. I am awaiting an ordered tap to see if I can repair the body threads. Any other suggestions?
Have no idea how this repair will go.
Guest -
August 20, 2019
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Pump Unloader Rebuild Kit
No questions have been asked yet
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 pressure washer would die after the power wand was squeezed.
James - October 14, 2019
Tool Type
Pressure Washer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set
Parts Used
I removed the nut holding the pump unloader with the spring, piston, and piston cylinder. I coated the new parts with a silicon lubricant and replaced them in the same order as I took them out. It took a little effort to reinstall the nut against the spring pressure. The pressure washer started right up and it was as good as new.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Low pressure
Bob - April 28, 2020
👍 0 of 1 people found this instruction helpful
Tool Type
Pressure Washer
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Wrench Set, Adjustable Wrench
Parts Used
Removed retaining fitting (plastic) had to drill fitting out as the plastic hex stripped.
Removed internal valves and spring
Installed new parts
Started up and had great pressure
Old valve was scored and didn't seat bypassing water
Five minute job took much longer due to stripped cheap plastic fitting
Removed internal valves and spring
Installed new parts
Started up and had great pressure
Old valve was scored and didn't seat bypassing water
Five minute job took much longer due to stripped cheap plastic fitting
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Unloader nut broke off trying to replace o ring.
Henry - July 14, 2017
👍 0 of 2 people found this instruction helpful
Tool Type
Pressure Washer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Wrench Set, plumbers grees to lube parts
Parts Used
It was easy but had some trouble with the spring to compress it down and screw the head nut at the same time.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
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.
