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CAT Pumps 31556 NBR Unloader Kit for 67DX39G1I Pumps – OEM Replacement Part

Original price $59.99 - Original price $59.99
Original price
$59.99
$59.99 - $59.99
Current price $59.99

Part Number: 31556
Category: Pressure Washer Pump Parts → Unloader Repair Kits → CAT Pumps Repair Parts
Type: CAT Pumps NBR Unloader Kit for 67DX39G1I Pumps


The CAT Pumps 31556 NBR Unloader Kit is a genuine OEM replacement repair kit designed for servicing compatible CAT Pumps 67DX39G1I triplex plunger pressure washer pumps. This complete unloader repair kit contains the critical NBR (Nitrile Buna-N) sealing components and wear parts required to restore proper pressure regulation, bypass function, and overall system performance.


Key Features & Benefits

  • Genuine CAT Pumps OEM Replacement Part
  • Designed for CAT Pumps 67DX39G1I pumps
  • Complete unloader rebuild and repair kit
  • Features durable NBR (Nitrile Buna-N) sealing components
  • Restores proper pressure regulation and bypass operation
  • Helps eliminate pressure fluctuations and cycling issues
  • Reduces leaks caused by worn unloader components
  • Supports preventative maintenance and pump rebuild programs
  • OEM-quality fit, durability, and reliability
  • Helps extend pump and unloader service life

Technical Specifications

Manufacturer: CAT Pumps

Part Number: 31556

Product Type: Unloader Repair Kit

Seal Material: NBR (Nitrile Buna-N)

Application: Unloader Valve Rebuild & Repair

Pump Compatibility: CAT Pumps 67DX39G1I

OEM Replacement: Yes

Kit Coverage: One Unloader Assembly


Compatible Pump Models

Compatible with:

  • CAT Pumps 67DX39G1I

Always verify pump model and unloader assembly compatibility before ordering.


Typical Applications

  • Pressure washer unloader rebuilds
  • Commercial pressure washer maintenance
  • Industrial cleaning equipment repairs
  • Fleet washing equipment servicing
  • Contractor equipment maintenance
  • Equipment rental fleet repairs
  • Pump restoration projects
  • Preventative maintenance programs

Performance Advantages

  • Restores proper pressure regulation and bypass control
  • Helps eliminate pressure surging and unloader cycling
  • Improves trigger gun response and system efficiency
  • Reduces leakage caused by worn seals and internal components
  • Supports smooth and consistent pressure output
  • Helps protect pump components from excessive pressure buildup
  • NBR sealing materials provide reliable durability and wear resistance
  • Genuine OEM components ensure proper fit and performance
  • Ideal for preventative maintenance and professional rebuild procedures

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