Yimi (Guangzhou) Automotive Parts Co, Ltd
| Weight | 1.09 kg |
| Piston Quantity | 1 |
| Delivery Time | 5-8 Work Days |
| Mounting Method | 4-Bolt Mounting |
| Bore Size | 1-3/16 inch (30.163 mm / 30.2 mm) |
| Payment Terms | T/T |
| Inlet Thread | 10mm, Inverted Flare |
| Supply Ability | 10000 pcs/month |
| Installation Position | Front Left |
| Material | High-Strength Cast Iron |
| Packaging Details | Neutral Package or as customers’ request |
| Bleeder Screw | Included |
| Model Number | NKR NPR 4HF1 |
| Certification | ISO/TS16949 |
| Brand Name | YIMI |
| Place of Origin | CHINA |
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Product Specification
| Weight | 1.09 kg | Piston Quantity | 1 |
| Delivery Time | 5-8 Work Days | Mounting Method | 4-Bolt Mounting |
| Bore Size | 1-3/16 inch (30.163 mm / 30.2 mm) | Payment Terms | T/T |
| Inlet Thread | 10mm, Inverted Flare | Supply Ability | 10000 pcs/month |
| Installation Position | Front Left | Material | High-Strength Cast Iron |
| Packaging Details | Neutral Package or as customers’ request | Bleeder Screw | Included |
| Model Number | NKR NPR 4HF1 | Certification | ISO/TS16949 |
| Brand Name | YIMI | Place of Origin | CHINA |
| High Light | 1-3/16 inch Bore Front Brake Wheel Cylinder ，High-Strength Cast Iron Brake Wheel Cylinder ，4-Bolt Mounting Wheel Cylinder | ||
The Front Brake Wheel Cylinder with OEM numbers 8-97139819-0 / 8971398190 is a verified direct-fit replacement for ISUZU NKR / NPR series light-duty trucks equipped with the 4HF1 engine. This critical component of the drum brake system converts hydraulic pressure from the brake master cylinder into mechanical force to push brake shoes against the brake drum, enabling vehicle deceleration and stopping.
Mounted on the brake backing plate and connected to the brake master cylinder via brake lines, the wheel cylinder pushes pistons outward when brake fluid flows in during brake pedal application. This forces brake shoes to expand and press against the brake drum, converting kinetic energy into thermal energy through friction. Features include a high-strength cast iron housing with precision-machined pistons and sealing components for stable brake pressure transmission and reliable sealing.
| Verification Item | Data | Source |
|---|---|---|
| Bore Size | 1-3/16 inch (30.163 mm) | Centric Specification |
| Bore Size | 30.2 mm | Yiparts |
| Material | High-Strength Cast Iron | CBT Auto Parts Specification |
| Piston Quantity | 1 (Single Piston) | Centric Specification |
| Mounting Method | 4-Bolt Mounting | Centric Specification |
| Inlet Thread | 10mm, Inverted Flare | Centric Specification |
| Bleeder Screw | Included | Centric Specification |
| Weight | ≈ 1.09 kg | Centric Specification |
| Installation Position | Front Left | Multiple Sources |
| Warranty | 1 Year / 30,000 km | Supplier Standard |
| Part Number: | 8-97139819-0 8971398190 | Product Name: | Brake Wheel Cylinder |
|---|---|---|---|
| Car Model: | NKR NPR | Engine Model: | 4HF1 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | ||
| Package: | Neutral Packing Or Make It As Requested | ||
| Material: | High-strength aluminum alloy & precision bearings | ||
| Cooling Type: | Engine coolant circulation | ||
| Installation: | Direct OEM replacement | ||
| Quality Standard: | OEM equivalent / ISO quality control | ||
| Brand | Model | Chassis/Platform | Engine | Years |
|---|---|---|---|---|
| ISUZU | NKR | NKR Series | 4HF1 | 1990–2010 |
| ISUZU | NPR | NPR Series | 4HF1, 4BD1, 4HE1 | 1990–2010 |
| ISUZU | NQR | — | 4HF1 | 1994– |
| ISUZU | ELF | — | 4HF1 | 1993–1998 |
| ISUZU | NLR | — | — | 2008– |
| ISUZU | NNR | — | — | 2008– |
| ISUZU | NMR85 | — | — | — |
| Chevrolet | W4500 Tiltmaster | — | — | 1992–1993 |
| GMC | W4500 Forward | — | — | 1992–1993 |
| QC Item | Verification Method | Standard |
|---|---|---|
| Body Dimensional Accuracy | CMM (Coordinate Measuring Machine) | Within OE specification tolerances |
| Bore Surface Finish | Surface Roughness Tester | Meets OE drawing requirements |
| Material Hardness | Rockwell Hardness Test (HRB) | Meets cast iron material standards |
| Seal Integrity | Air Tightness / Hydraulic Leak Test | 100% pass — zero leakage |
| Bleeder Screw Function | Functional Test | Smooth operation, reliable sealing |
| Visual Inspection | Visual + Gauge Inspection | No casting defects, burrs, or corrosion |
| Assembly Completeness | 100% Inspection | All seals, dust boots, pistons correctly installed |
| Maintenance Item | Interval |
|---|---|
| Brake Fluid Inspection / Replacement | Every 2 years or 40,000 km |
| Brake Wheel Cylinder Inspection | During every brake shoe replacement |
| Wheel Cylinder Replacement | Immediately when leakage, sticking, or degraded braking performance is detected |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
2005
Total Annual:
8000000-10000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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 ...
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