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ISUZU Rear Brake Wheel Cylinder 8-97139824-0 8971398240 Compatible with NKR NPR 4BD1 4HF1 Diesel Engine — 1-3/16 Inch Bore Rear Right OEM Standard Replacement
Product Overview
The ISUZU Rear Brake Wheel Cylinder with OEM numbers 8-97139824-0 / 8971398240 is a precision-engineered replacement designed for ISUZU NKR and NPR series light-duty trucks, compatible with 4BD1 and 4HF1 diesel engines. This component is a core actuation element of the vehicle's hydraulic braking system — the Rear Right Brake Wheel Cylinder Assembly — responsible for converting hydraulic pressure from the master cylinder into mechanical force to push the brake shoes against the brake drum.
Numbering Note: This product number is 8-97139824-0 / 8971398240. Cross-reference numbers include 8-97022142-0 / 8970221420 and 8-97022142-1 / 8970221421. Brands include IZUMI, DAMIN, and BZLP. Please verify the specific number and installation position based on actual vehicle configuration.
Working Principle
The brake wheel cylinder is a critical actuation component of the hydraulic braking system, mounted on the brake backing plate and connected to the master cylinder via brake fluid lines.
Hydraulic Input: When the driver depresses the brake pedal, the master cylinder converts pedal force into hydraulic pressure transmitted through the brake fluid lines.
Piston Actuation: Hydraulic pressure pushes the piston inside the wheel cylinder outward.
Brake Shoe Expansion: The piston transmits force through the push rod to the brake shoes, expanding them against the rotating brake drum to generate friction for deceleration.
Brake Release: When the driver releases the brake pedal, hydraulic pressure is released and return springs pull the piston back, separating the brake shoes from the drum.
Worn internal seals; hydraulic leakage; insufficient braking force
Vehicle pulls to one side during braking
Single-side cylinder malfunction; uneven braking force
Brake drag; vehicle still feels braked after pedal release
Stuck piston; cylinder fails to return
Visible brake fluid leakage at the wheel cylinder area
Worn/damaged cylinder seals
Soft or spongy brake pedal; increased pedal travel
Internal leakage or air in hydraulic system
Technical Specifiions
Part Number
8-97139824-0 8971398240
Product Name
Rear Brake Wheel Cylinder
Car Model
NKR NPR
Engine Model
4BD1 4HF1
Bore Size
1-3/16 Inch (30.16mm)
Gear Teeth
16 teeth
Installation Position
Rear Right (RH)
Material
Heavy-Duty Cast Iron
Brake Type
Drum Brake
Condition
100% Brand New
Origin
China Mainland
Compatibility
Primary Appliions:
Brand
Model
Compatible Engine
Years
ISUZU
NKR
4BD1, 4HF1
1994–
ISUZU
NPR
4BD1, 4HF1
1994–
Extended Appliions:
Brand
Model Series
Compatible Engine
ISUZU
NQR
4BE1, 4HF1, 4HG1, 4HK1, 4JJ1
ISUZU
NPS
4BE1, 4HF1, 4HG1, 4HK1, 4JJ1
ISUZU
NLR / NMR
4BE1, 4HF1, 4HG1, 4HK1, 4JJ1
ISUZU
ELF
4BD1, 4HF1
Left/Right Side Pairing: This product is the Rear Right (RH) brake wheel cylinder. The Rear Left (LH) counterpart should be ordered separately. Please confirm whether the left or right side is needed before ordering.
Features & Benefits
1-3/16 Inch Precision Bore (30.16mm) Provides adequate hydraulic thrust for responsive, reliable braking
Heavy-Duty Cast Iron Construction Excellent corrosion resistance and mechanical strength for long-term reliable operation
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
