Description
Review this item in the context of the repair, installation access, nearby parts, and the result the completed job is intended to achieve.
31684 Cat Seal Kit 3DNX Pumps. Cat Pumps part 31684 Seal rebuild Kit for CAT Model 3DNX25GSI, 3DNX27GSI, and Rigid 3GXT27 Pumps.
No structured vehicle fitment data is available. Compare the listing with the vehicle and existing part before ordering.
Repair scenarios, installation, companion parts, and use outcomes
Buying guidance
Quick decision
Review this pump seals in the context of the repair and the surrounding components.
Repair scenario
- Identify the symptom and confirm that this is the component required by the repair.
- Inspect nearby connectors, fasteners, and mating surfaces before installation.
Installation notes
- Use the listing instructions when present and follow the vehicle service procedure.
- Professional installation may be appropriate when the repair requires special tools or calibration.
Companion parts
- Inspect nearby fasteners, connectors, seals, fluids, and wear items before starting the repair.
- Use the service procedure and the visible package contents to identify any additional parts or tools required.
Before you buy
- Compare the listing title, photos, package contents, and specifications with the part being replaced.
- Confirm vehicle compatibility and installation requirements before ordering.
Customer feedback
Ratings and written reviews
3.1 / 5
9 source ratings
Source: Amazon. Imported marketplace feedback is shown for product research and is not a review of a purchase made on this website.
Roger T. –
Got my cat pump back up and running! The pump was dead in the water. When the old seals failed from being run dry oil had leaked into the pump case and no longer produced pressure. Now it works like new! There are some good YouTube videos that cover replacement.
Wayne –
Way over priced. $119.00 for $10.00 worth of O rings. Doesn’t even have all the O rings to replace everything. For that price it should have all the springs plungers etc.