HomeBrake > Brake HydraulicsDorman W86000 Drum Brake Wheel Cylinder - Rear
Part #: W86000

Dorman W86000 Drum Brake Wheel Cylinder - Rear

Rear
⚙️ 12 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet, C20, C20 Suburban, C30, G30, K20, K20 Suburban, P20, and P30
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Reliable Drum Brake Wheel Cylinder for Chevrolet Trucks

The Dorman W86000 drum brake wheel cylinder is engineered to restore proper braking function for select Chevrolet truck models. Designed with durable cast iron and a precise 1.125-inch bore diameter, this wheel cylinder ensures consistent hydraulic pressure for safe stopping performance.

  • Includes bleeder screw for easy brake bleeding
  • Constructed from cast iron for strength and durability
  • 1.125-inch bore diameter for accurate fit and function
  • Brake component inlet thread size: 3/8-24 inches
  • Compatible with Chevrolet C20, C20 Suburban, C30, G30, K20, K20 Suburban, P20, and P30 models

Durable Construction and Precise Specifications

This Dorman drum brake wheel cylinder (part number W86000) features a cast iron casting material that provides long-lasting resistance to wear and corrosion. The 1.125-inch bore diameter is designed to match original equipment specifications, ensuring proper hydraulic pressure and brake shoe movement. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake system. The brake component inlet thread size of 3/8-24 inches and thread diameter of 3/8 inch provide secure connections within the brake hydraulic system.

Compatible Chevrolet Truck Models

This wheel cylinder is compatible with a range of Chevrolet trucks, including the C20, C20 Suburban, C30, G30, K20, K20 Suburban, P20, and P30. It is designed to meet the specific brake hydraulics requirements of these models, making it a suitable replacement part for restoring braking performance.

Common Brake Issues Addressed

  • Leaking or damaged wheel cylinder causing brake fluid loss
  • Uneven brake shoe wear due to improper hydraulic pressure
  • Spongy or soft brake pedal feel from air in the brake lines
  • Reduced braking efficiency in Chevrolet C20 and K20 trucks
  • Brake drag or sticking caused by faulty wheel cylinder pistons

Installation Notes and Tips

When installing the Dorman W86000 drum brake wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove any air pockets. Verify thread sizes and bore diameter match the original equipment specifications for your Chevrolet truck model. Inspect brake shoes and hardware for wear and replace as necessary to maintain optimal braking performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The W86000 drum brake wheel cylinder undergoes rigorous quality control to ensure durability and reliable operation. Please refer to Dorman's warranty policy for specific coverage details.

BrandDorman
Part NumberW86000
Bleeder Screw IncludedYes
Bleeder Screw Cap IncludedNo
Casting MaterialCast iron
Bore Diameter1.125
Brake Component Inlet Thread Size3/8-24 in
Package Contents1 drum brake wheel cylinder
Thread Diameter3/8

This part fits 12 vehicles. Search below:

YearMakeModelPositionNotes
1975ChevroletC20RearBore: 1.125 In.; 13 In. Brakes
1975ChevroletC20 SuburbanRearBore: 1.125 In.; 13 In. Brakes
1975ChevroletC30Rear6,600 to 8,200 Lb. GVW; Bore: 1.125 In.
1975ChevroletG30Rearw/Single Rear Wheel (SRW); 6,400 to 8,400 Lb. GVW; Bore: 1.125 In.
1975ChevroletK20RearBore: 1.125 In.; 13 In. Brakes
1975ChevroletK20 SuburbanRearBore: 1.125 In.; 13 In. Brakes
1975ChevroletP20RearBore: 1.125 In.; 13 In. Brakes
1975ChevroletP30Rear7,600 to 8,200 Lb. GVW; Bore: 1.125 In.; wo/Motorhome Chassis
1975GMCG35Rearw/Single Rear Wheel (SRW); 6,400 to 8,400 Lb. GVW; Bore: 1.125 In.
1974ChevroletC20 SuburbanRearBore: 1.125 In.; 13 In. Brakes
1974ChevroletK20 SuburbanRearBore: 1.125 In.; 13 In. Brakes
1974GMCG35/G3500 VanRearw/Single Rear Wheel (SRW); 6,400 to 8,400 Lb. GVW; Bore: 1.125 In.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

134.660151800494718E113203729133710784-4401586000F86000W-86015W906377WC254110

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.