ISUZU Brake Wheel Cylinder 25.4mm Bore Size ISO/TS16949 Certified OEM Standard Replacement for NKR 100P 4JB1 Rear Left
Basic Properties
Place of Origin:
CHINA
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
NKR 100P 4JB1
Trading Properties
Minimum Order Quantity:
20 PCS
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| Bore Size: | 1 Inch (25.4mm) | Installation Position: | Rear Left |
| Material: | High-quality Metal | OEM Part Number: | 8-97078682-0 / 8970786820 |
| Compatible Engine: | ISUZU 4JB1 | Compatible Model: | ISUZU NKR 100P |
| Part Type: | Hydraulic Brake Wheel Cylinder Assembly | Weight: | Standard |
| High Light: | 25.4mm Bore Size Brake Wheel Cylinder,ISO/TS16949 Certified Brake Wheel Cylinder,OEM Standard Replacement Brake Wheel Cylinder |
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Product Description
ISUZU Brake Wheel Cylinder 8-97078682-0 8970786820 for NKR 100P 4JB1 — Rear Left 25.4mm OEM Standard
ISUZU Brake Wheel Cylinder 8-97078682-0 8970786820 Compatible with NKR 100P 4JB1 Engine — Rear Left 25.4mm OEM Standard Replacement
Product Overview
The ISUZU Brake Wheel Cylinder with OEM numbers 8-97078682-0 / 8970786820 is a precision-engineered replacement designed for ISUZU NKR 100P series light-duty trucks, compatible with 4JB1 diesel engines. This component is a core actuation element of the vehicle's hydraulic braking system — the Rear Left 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.
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.
Failure Symptoms
⚠️ Inspect immediately if any of these occur
| 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 |
Verifiable Data
🔬 Based on Industry Standards & General Validation
Bore Size: 1 inch (25.4mm) — verified on test bench
Installation Position: Rear Left (LH)
Certification: ISO/TS16949 and CE certified
Quality: 100% tested before shipment
Warranty: 1 year
Supply Capacity: 10000 sets/month
Delivery Time: 5–8 working days
Minimum Order Quantity: 5 pieces
Product Specifications
| Part Number: | 8-97078682-0 8970786820 |
| Car Model: | NKR 100P |
| Engine Model: | 4JB1 |
| Condition: | 100% Brand New |
| Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe |
| Material: | High-strength aluminum alloy & precision bearings |
Vehicle & Engine Compatibility
| Brand | Model Series | Compatible Engine | Notes |
|---|---|---|---|
| ISUZU | NKR 100P | 4JB1 | Light-duty truck |
| ISUZU | ELF | 4JB1 | Light-duty truck |
| ISUZU | NPR | 4JB1 | Light/medium-duty truck |
Important Fitment Warnings
- Number Confirmation: This product number is 8-97078682-0 / 8970786820. Cross-reference numbers include 8-94128-143-1, 8941281431. Verify the specific number on the original part before ordering.
- Installation Position: This is the Rear Left brake wheel cylinder. Confirm whether the left or right side is needed.
- Pair Replacement Recommended: Brake wheel cylinders should be replaced in pairs (left and right) to ensure balanced braking force.
- Associated Components: When replacing the wheel cylinder, it is recommended to 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 when replacing the wheel cylinder.
- Professional Installation: The brake wheel cylinder is a critical braking system safety component — professional installation is strongly recommended.
Features & Benefits
| Feature | Benefit + Verification Signal |
|---|---|
| 1 Inch (25.4mm) Precision Bore | Provides adequate hydraulic thrust for responsive, reliable braking — effectively reduces stopping distance and enhances driving safety. |
| ISO/TS16949 Quality Management Certified | Internationally recognized automotive industry quality standard ensuring full-process quality control. |
| CE Certified | Internationally recognized quality certification ensuring compliance with European safety, health, and environmental standards. |
| 100% Factory Quality Inspection | Every piece undergoes strict quality inspection — 100% tested. |
| 1-Year Warranty | Reliable after-sales protection — 1-year quality guarantee. |
| Broad OEM Cross-Compatibility | Replaces OEM numbers 8-97078682-0 / 8970786820; compatible with 8-94128-143-1, 8941281431, 8971398420 and other numbers — fits NKR 100P, ELF, NPR models. |
Quality Control & Verification
| QC Item | Inspection Method | Acceptance Criterion | Frequency |
|---|---|---|---|
| Cylinder bore size | Bore gauge / CMM | 25.4mm ± tolerance | 100% |
| Piston-to-bore clearance | Special gauges | Standard range | Batch sampling |
| Seal integrity | Visual + dimensional inspection | No damage, no deformation | 100% |
| Hydraulic seal test | Pressure test bench | No leakage; stable pressure retention | 100% |
| Material composition | Spectrometer | Per metal standard | Batch sampling |
| Surface anti-corrosion | Salt spray test | Per anti-corrosion standard | Annual sampling |
Installation & Maintenance Recommendations
⚠️ 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.
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.
Installation Guidelines (Reference Workshop Manual):
Preparation:
- Confirm installation position (Rear Left) and part number (8-97078682-0)
- Prepare tools: Socket wrench, brake line wrench, torque wrench, brake fluid (DOT 3 or DOT 4)
- Recommended to also prepare: Brake shoes, brake drum
Removing Old Wheel Cylinder:
- 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.
- Carefully remove the old brake wheel cylinder.
Installing New Wheel Cylinder:
- Clean mounting surface: Thoroughly clean the brake backing plate mounting surface — ensure no oil, dirt, or debris.
- Install new cylinder: Position the new cylinder correctly and torque mounting bolts to specification.
- Connect brake line: Reconnect the brake fluid line — ensure tight, leak-free connection.
- Fill brake fluid: Fill the master cylinder reservoir with DOT 3 or DOT 4 brake fluid to the correct level.
- Brake system bleeding: Mandatory — bleed the brake system starting from the farthest wheel to remove air from lines until the brake pedal feels firm.
- Leak check: Inspect all connections and cylinder body — confirm no brake fluid leakage.
Post-Installation Checks (Mandatory):
- Brake pedal feel check: Depress brake pedal — confirm firm feel, no sponginess, normal travel.
- Leak check: Inspect all brake line connections and cylinder body — confirm no brake fluid leakage.
- Road test: Perform low-speed brake test — confirm balanced braking, no pulling, no abnormal noise, normal stopping distance.
Maintenance Schedule
| Item | Interval | Notes |
|---|---|---|
| Brake fluid inspection | Every 10,000 km / each service | Check fluid level and color; brake fluid should be clear |
| Wheel cylinder & line leak check | Every 20,000 km | Check for brake fluid seepage |
| Brake fluid replacement | Every 2 years / 40,000 km | Brake fluid absorbs moisture; long-term use degrades performance |
| Wheel cylinder inspection | Upon symptom occurrence | Inspect/repair/replace if leakage or sticking detected |
Packaging & Supply
| Item | Detail |
|---|---|
| Packaging | Neutral packaging or customized per customer request |
| Quantity per package | 1 pc/box (standard shipment packaging) |
| Brand | BZLP |
| Place of Origin | China |
| Customization Options | OEM custom packaging / neutral packaging / private labeling |
| Minimum Order Quantity | 5 pieces |
| Delivery Time | 5–8 working days |
| Supply Capacity | 10000 sets/month |
| Payment Terms | T/T, Western Union |
| Warranty | 1 year |
| Target Customers | Truck parts wholesalers, light-duty truck repair shops, fleet purchasers, export traders |
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