ISUZU Brake Wheel Cylinder with 1-3/16 Inch Bore and 16-Tooth Gear for NKR NPR 4BD1 4HF1 - Heavy-Duty Cast Iron Construction
| Gear Teeth: | 16 Teeth | Net Weight: | 1.215 Kg |
| Material: | Heavy-Duty Cast Iron | Brake Type: | Drum Brake |
| Bore Size: | 1-3/16 Inch (30.16mm) | Part Type: | Hydraulic Brake Wheel Cylinder Assembly |
| Compatible Engines: | ISUZU 4BD1, 4HF1 | Compatible Models: | ISUZU NKR, NPR |
| High Light: | 1-3/16 Inch Bore Brake Wheel Cylinder,16-Tooth Gear Brake Wheel Cylinder,Heavy-Duty Cast Iron Wheel Cylinder |
||
ISUZU Brake Wheel Cylinder 8-97139825-0 8971398250 Compatible with NKR NPR 4BD1 4HF1 Diesel Engine — 1-3/16 Inch Bore 16-Tooth OEM Standard Replacement
Part Number Note: This product number is 8-97139825-0 / 8971398250. Cross-reference numbers include 8-97022143-0 / 8970221430 and 8-97022143-1 / 8970221431. Please verify the specific number and installation position based on actual vehicle configuration.
The ISUZU Brake Wheel Cylinder with OEM numbers 8-97139825-0 / 8971398250 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, responsible for converting hydraulic pressure from the master cylinder into mechanical force to push the brake shoes against the brake drum.
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.
| Symptom | Probable Cause |
|---|---|
| Reduced braking performance; increased stopping distance | 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 |
Bore Size: 1-3/16 Inch (30.16mm) — industry-verified standard specification
Gear Teeth: 16 teeth — for brake shoe clearance adjustment
Material: Heavy-Duty Cast Iron — durable, capable of withstanding high pressure and thermal cycling
Brake Type: Drum Brake
Seals: High-quality seals prevent leaks and contamination
Design: Equipped with Cooper bleeder screw and gear-style adjuster
Quality Certification: ISO/TS16949 certified
Net Weight: 1.215 kg
HS Code: 870830000
Place of Origin: China
Primary Applications:
- ISUZU NKR with 4BD1, 4HF1 engines (Light-duty truck)
- ISUZU NPR with 4BD1, 4HF1 engines (Light/medium-duty truck)
Extended Applications:
- ISUZU NQR with 4BE1, 4HF1, 4HG1, 4HK1, 4JJ1 engines
- ISUZU NPS with 4BE1, 4HF1, 4HG1, 4HK1, 4JJ1 engines
- ISUZU NLR/NMR with 4BE1, 4HF1, 4HG1, 4HK1, 4JJ1 engines
- ISUZU ELF with 4BD1, 4HF1 engines
- Number Confirmation: Verify the specific number on the original part before ordering
- Position Confirmation: Different sources list this product as both front and rear left — verify actual installation position
- Pair Replacement Recommended: Brake wheel cylinders should be replaced in pairs (left and right) to ensure balanced braking force
- Associated Components: Inspect brake shoes, brake drums, and brake lines — replace if necessary
- Brake Fluid Replacement: Replace brake fluid (DOT 3 or DOT 4) and bleed the hydraulic system
- Professional Installation: Critical braking system safety component — professional installation strongly recommended
Provides adequate hydraulic thrust for responsive, reliable braking
Excellent corrosion resistance and mechanical strength for long-term reliable operation
Enables precise brake shoe clearance adjustment
Effectively prevents brake fluid leakage and contamination
Equipped with Cooper bleeder screw and gear-style adjuster
Internationally recognized automotive industry quality standard
| QC Item | Inspection Method | Acceptance Criterion |
|---|---|---|
| Cylinder bore size | Bore gauge / CMM | 1-3/16 inch (30.16mm) ± tolerance |
| Piston-to-bore clearance | Special gauges | Standard range |
| Seal integrity | Visual + dimensional inspection | No damage, no deformation |
| Hydraulic seal test | Pressure test bench | No leakage; stable pressure retention |
| Material composition | Spectrometer | Per cast iron standard |
IMPORTANT SAFETY NOTICE: The brake wheel cylinder is a critical braking system safety component that directly affects vehicle braking performance and driving safety. Professional installation with specialized tools is strongly recommended.
Preparation:
- Confirm installation position and part number (8-97139825-0)
- Prepare tools: Socket wrench, brake line wrench, torque wrench, brake fluid (DOT 3 or DOT 4)
- Recommended to also prepare: Brake shoes, brake drum, brake fluid
Installation Steps:
- Park vehicle on level surface, engage parking brake, and securely support with jack stands
- Remove the relevant wheel to access the brake assembly
- Disconnect the brake fluid line from the old cylinder using a brake line wrench
- Remove bolts or fasteners securing the old cylinder
- Clean mounting surface thoroughly
- Install new cylinder and torque mounting bolts to specification
- Reconnect brake fluid line ensuring tight, leak-free connection
- Fill master cylinder reservoir with DOT 3 or DOT 4 brake fluid
- Bleed brake system using Cooper bleeder screw
- Inspect all connections for leaks
| Packaging | Neutral packaging |
| Quantity per package | 1 pc/box (standard shipment packaging) |
| Product Net Weight | 1.215 kg |
| Brand | DAMIN / IZUMI / OEM Standard |
| Minimum Order Quantity | 1 piece |
| Delivery Time | 5–8 working days |
| Supply Capacity | 1000 pieces/month |
Engine Block 5873102680 5-87310268-0 For ISUZU 100P 4JB1 Diesel Engine Parts
Engine Block 5873102680 5-87310268-0 For ISUZU 100P 4JB1 Diesel Engine Parts Part Number: 5873102680 5-87310268-0 Product Name: Engine Block Car Model: ISUZU 100P Engine Model: ISUZU 4JB1 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ,Asia...
Engine Overhaul Gasket Kit 5-87811868-1 5878118681 For ISUZU NPR 4HF1
High-quality Engine Overhaul Gasket Kit 5-87811868-1 for ISUZU NPR trucks equipped with 4HF1 engine. Complete OEM-equivalent gasket set designed for full engine overhaul and long-term sealing performance. Part Number: 5-87811868-1 5878118681 Product Name: Engine Overhaul Gasket Kit Car Model: ISUZU ...
Cylinder Liner Kit 5-87810143-1 5878101431 For ISUZU FSR 6BF1
High-quality Cylinder Liner Kit 5-87810143-1 for ISUZU FSR trucks equipped with the 6BF1 engine. OEM-equivalent replacement designed to restore engine performance and extend service life. Part Number: 5-87810143-1 5878101431 Product Name: Cylinder Liner Kit Car Model: ISUZU FSR Engine Model: ISUZU ...
Water Pump Assembly With Gasket for ISUZU NPR59 4BC2 8970211711 8-97021171-1
Water Pump Assembly With Gasket for ISUZU NPR59 4BC2 8970211711 8-97021171-1 Part Number: 8970211711 8-97021171-1 Product Name: Water Pump Assembly Car Model: ISUZU NPR59 Engine Model: ISUZU 4BC2 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle ...
