CAT Pumps 7860 Unloader Valve with Injector – OEM Replacement Part

Part Number: 7860
Category: Pressure Washer Components → Unloader Valves → CAT Pumps Parts
Type: CAT Pumps Brass Unloader Valve with Injector

The CAT Pumps 7860 Unloader Valve with Injector is a genuine OEM pressure-regulating unloader designed to provide consistent system pressure, pump protection, and chemical injection capabilities for commercial and industrial pressure washer systems. Constructed from durable brass, this unloader valve is engineered to handle operating pressures from 700 to 4000 PSI and flow rates between 3 and 5 GPM.

Key Features & Benefits

• Genuine CAT Pumps OEM Replacement Part
• Integrated unloader valve with injector capability
• Brass construction for durability and corrosion resistance
• Adjustable pressure range from 700 to 4000 PSI
• Supports flow rates from 3 to 5 GPM
• Built-in bypass channel for safe low-pressure bypass operation
• Pressure-sensitive design provides immediate pressure response
• Direct-mount flow-through screws simplify installation
• Helps protect pumps, hoses, and spray guns from pressure spikes
• Ideal for commercial and industrial pressure washer systems

Technical Specifications

Manufacturer: CAT Pumps

Part Number: 7860

Product Type: Unloader Valve with Injector

Material: Brass

Pressure Range: 700 – 4000 PSI

Flow Range: 3 – 5 GPM

Inlet Port: 1/2" NPTF

Discharge Port: 3/8" NPTM

Bypass Type: Built-In Channel Bypass

Pressure Adjustment: Adjustable Handle

OEM Replacement: Yes

Compatible Pump Models

Frequently used with:

• CAT Pumps 66DX30G1I
• CAT Pumps 66DX35G1I
• CAT Pumps 66DX40G1I

Always verify pump compatibility before ordering.

Typical Applications

• Commercial pressure washers
• Industrial cleaning systems
• Fleet washing equipment
• Agricultural cleaning systems
• Contractor pressure washer rigs
• Mobile pressure washing trailers
• Equipment wash bays
• Chemical and detergent injection systems

Performance Advantages

• Maintains consistent system pressure for optimal cleaning performance
• Protects pumps and spray guns from excessive pressure buildup
• Provides safe low-pressure bypass operation when the gun is closed
• Pressure-sensitive design delivers instant operating pressure
• Integrated injector supports chemical and detergent application
• Direct-mount installation reduces plumbing complexity
• Durable brass construction ensures long service life
• Improves system reliability and operational efficiency
• Ideal for professional pressure washing applications

Maintenance Recommendations

• Inspect the unloader valve regularly for leaks, pressure fluctuations, or bypass issues.
• Verify pressure settings during routine maintenance intervals.
• Inspect injector components, seals, and adjustment mechanisms for wear.
• Flush contaminants from the pressure washer system to minimize internal damage.
• Follow CAT Pumps installation and pressure adjustment procedures.
• Use only genuine CAT Pumps OEM replacement parts when servicing the valve.