








🛠️ Upgrade your pressure washer game with a cap that never quits!
The Earthtec Pressure Washer 547961 Oil Filler Cap is a durable, precision-engineered replacement part designed for Cat pump models 2SF, 3DX, and 3SP. Made from impact-resistant ABS plastic and featuring a leak-proof O-ring seal, it ensures a secure fit and prevents oil leakage. Easy to install without special tools, this cap is a must-have for maintaining peak pressure washer performance and longevity.




| ASIN | B07JCNXBMD |
| Best Sellers Rank | #191,092 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,325 in Pressure Washer Accessories |
| Customer Reviews | 4.8 4.8 out of 5 stars (45) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.704 ounces |
| Item model number | 547961 |
| Package Dimensions | 9.88 x 6.14 x 1.61 inches |
G**Y
Fits 4spx , 4dnx25gs1 , ca547961 pumps --- nice replacement part
I change my pressure washer pump oil at regular intervals and I have twisted off two of the plugs made by Cat Pump company . Washer pumps run hot especially if you run them on close to max pressure so the plastic starts to break down under the heat and one twist to many and the threads break off in the hole . That is why I ordered this replacement plug , it fits perfectly . I am posting my pump # 4dnx25gs1.This might help you if you don't have a part # and also for 4spx models
J**F
Good replacement for a CAT 3GXT30 Pump
Fit perfectly as a replacement for original that had sheared off at last pump oil change. Came with O-Ring as well. Went onto a Cat pump model 3GXT30 (powered by a Subaru Robbin engine model RD80763 sold circa 2009 as a Rigid 3300psi pressure washer).
K**R
It fits, as long as the number match up
I bought this to replace the oil cap that melted when the oil drain plug failed and caused the motor to overheat.
D**O
It fits as advertised.
It fits just like the factory part. Strongly recommend as a replacement part.
E**Z
Exact one
You have to be careful with parts like this ..I got this after seeing many other parts that looked similar but were not the right one..this one was the one for my replacement
D**.
Fast delivery!
right part, here fast.
S**H
Fit Perfect
The day I got this in the mail, I was back out using my pressure water. Thank you!
F**Y
Durability?
Second one. Fitment and function are good but after a few hours of use, the top half separated when I removed to change pump oil.
Trustpilot
1 week ago
2 days ago