Yimi (Guangzhou) Automotive Parts Co, Ltd
| Inlet Thread | 10mm, Inverted Flare |
| Payment Terms | T/T |
| Weight | 1.00 – 1.15 kg |
| Mounting Method | 4-Bolt Mounting |
| Delivery Time | 5-8 Work Days |
| Bore Size | 1-3/16 inch (30.163 mm / 30.2 mm) |
| Piston Quantity | 1 |
| Bleeder Screw | Included, 16 Teeth |
| Installation Position | Front Right Front |
| Supply Ability | 10000 pcs/month |
| Material | High-Strength Cast Iron |
| Packaging Details | Neutral Package or as customers’ request |
| Model Number | NKR NPR 4HF1 |
| Certification | ISO/TS16949 |
| Place of Origin | CHINA |
| Brand Name | YIMI |
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Product Specification
| Inlet Thread | 10mm, Inverted Flare | Payment Terms | T/T |
| Weight | 1.00 – 1.15 kg | Mounting Method | 4-Bolt Mounting |
| Delivery Time | 5-8 Work Days | Bore Size | 1-3/16 inch (30.163 mm / 30.2 mm) |
| Piston Quantity | 1 | Bleeder Screw | Included, 16 Teeth |
| Installation Position | Front Right Front | Supply Ability | 10000 pcs/month |
| Material | High-Strength Cast Iron | Packaging Details | Neutral Package or as customers’ request |
| Model Number | NKR NPR 4HF1 | Certification | ISO/TS16949 |
| Place of Origin | CHINA | Brand Name | YIMI |
| High Light | 1-3/16" Bore Brake Wheel Cylinder ，High-Strength Cast Iron Wheel Cylinder ，4-Bolt Mounting Front Brake Wheel Cylinder | ||
The Front Brake Wheel Cylinder with OEM numbers 8-97139820-0 / 8971398200 is a verified direct-fit replacement for ISUZU NKR / NPR / NQR 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, this wheel cylinder operates by pushing pistons outward when brake fluid flows from the master cylinder. This action forces brake shoes to expand and press against the brake drum, converting kinetic energy into thermal energy through friction. The high-strength cast iron housing with precision-machined pistons and sealing components ensures stable brake pressure transmission and long-term reliable sealing.
| Verification Item | Data | Source |
|---|---|---|
| Bore Size | 1-3/16 inch (30.163 mm / 30.2 mm) | Product Specification |
| Material | High-Strength Cast Iron | Product Specification |
| Piston Quantity | 1 (Single Piston) | Product Specification |
| Mounting Method | 4-Bolt Mounting | Product Specification |
| Inlet Thread | 10mm, Inverted Flare | Product Specification |
| Bleeder Screw | Included, 16 Teeth | Product Specification |
| Weight | ≈ 1.00 – 1.15 kg | PartSouq / Product Specification |
| Installation Position | Front Right Front | Product Specification |
| Warranty | 1 Year / 30,000 km | Supplier Standard |
| Part Number: | 8-97139820-0 8971398200 | 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 | ||
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
Primary Applications:
| Brand | Model | Chassis/Platform | Engine | Years |
|---|---|---|---|---|
| ISUZU | NKR | NKR Series | 4HF1, 4BE1, 4HG1, 4HK1, 4JJ1 | 1994– |
| ISUZU | NPR | NPR Series | 4HF1, 4BE1, 4HG1, 4HK1, 4JJ1 | 1994– |
| ISUZU | NQR | — | 4HF1, 4BE1, 4HG1, 4HK1, 4JJ1 | 1994– |
| ISUZU | NPS | — | 4HF1, 4BE1, 4HG1, 4HK1, 4JJ1 | — |
| ISUZU | ELF | ELF Platform/Chassis(NKR7_, NKS7_, NHR6_, NKR6_) | 4HF1, 4BE1 | 1993–1998 |
| ISUZU | NLR | — | — | 2008– |
| ISUZU | NMR | NMR85 | — | 2008– |
| ISUZU | NNR | — | — | 2008– |
Important Notes:
| 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 |
| Quality Management System | ISO/TS16949 Certified | Meets international automotive industry quality standards |
IMPORTANT: The brake system is a critical safety component. Installation and repair should be performed by qualified professionals following the vehicle's original factory service manual.
| 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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