Yimi (Guangzhou) Automotive Parts Co, Ltd
| Nominal Displacement | 7.0 ml/r |
| Delivery Time | 5-8 Work Days |
| Speed Range | 500–5000 r/min |
| Packaging Details | Neutral Package or as customers’ request |
| Payment Terms | T/T |
| Outlet Thread | M12 × 1.25 |
| Controlled Flow Rate | 8.0 L/min |
| Pump Type | Vane-Type Hydraulic Pump |
| Maximum Pressure | 100 bar |
| Inlet Port Size | 17.5 mm |
| Supply Ability | 10000 pcs/month |
| Rotation Direction | Left-Hand |
| Model Number | NPR 4HF1 |
| Certification | ISO/TS16949 |
| Brand Name | YIMI |
| Place of Origin | CHINA |
View Detail Information
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Product Specification
| Nominal Displacement | 7.0 ml/r | Delivery Time | 5-8 Work Days |
| Speed Range | 500–5000 r/min | Packaging Details | Neutral Package or as customers’ request |
| Payment Terms | T/T | Outlet Thread | M12 × 1.25 |
| Controlled Flow Rate | 8.0 L/min | Pump Type | Vane-Type Hydraulic Pump |
| Maximum Pressure | 100 bar | Inlet Port Size | 17.5 mm |
| Supply Ability | 10000 pcs/month | Rotation Direction | Left-Hand |
| Model Number | NPR 4HF1 | Certification | ISO/TS16949 |
| Brand Name | YIMI | Place of Origin | CHINA |
| High Light | 8-97136574-0 OEM Fit Power Steering Pump ，4HF1 4HE1 4HG1T Engine Compatible Steering Oil Pump ，100 bar Maximum Pressure Power Steering Pump | ||
The Power Steering Oil Pump with OEM numbers 8-97136574-0 and 8971365740 is a verified direct-fit replacement for ISUZU NPR / NQR / NPS / NP / NQ series trucks equipped with 4HF1 / 4HE1 / 4HG1T diesel engines. This steering pump is the core power source of the hydraulic power steering system, converting the engine's mechanical energy into hydraulic energy to deliver stable, continuous hydraulic assistance to the steering gear — ensuring light and precise steering operation even at low speeds and under heavy loads.
The power steering pump is driven by the engine via a belt. It draws steering fluid (ATF or dedicated power steering fluid) from the reservoir, pressurizes it, and delivers it to the steering gear (or steering box). When the driver turns the steering wheel, the steering gear uses the hydraulic pressure to push the steering arm (or rack), turning the wheels.
This pump employs a vane-type hydraulic pump design: the rotor and cam ring are eccentrically arranged, and the vanes — under centrifugal force and hydraulic pressure — press against the cam ring inner surface, creating cyclic changes in sealed volume for oil suction and delivery. The pump incorporates an internal flow control valve and a safety valve (relief valve), ensuring a stable controlled flow (8.0 L/min) across varying engine speeds and automatically relieving pressure when the system exceeds 100 bar, protecting the entire hydraulic assist system from overload damage.
Replace the power steering pump when any of these symptoms appear:
⚠️ Critical Inspection Note: Before replacing the steering pump, the steering system must be thoroughly flushed, the fluid in the reservoir replaced, and all lines and fittings checked for cleanliness. Never reuse old steering fluid. After installing the new pump, bleed the system (turn the steering wheel lock-to-lock several times at idle) and check fluid level and for leaks. Always inspect the drive belt tension and wear and replace if necessary.
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 8-97136574-0 | eBay, HUSUZO, multilingual product pages |
| Part Number (Long) | 8971365740 | HUSUZO, multilingual product pages |
| Official Part Name | PUMP ASM; OIL,P/S | HUSUZO product page |
| Vehicle Models | ISUZU NPR / NQR / NPS / NP / NQ | FridayParts, multilingual product pages |
| Engine Compatibility | 4HF1 / 4HE1 / 4HG1T | FridayParts, multilingual product pages |
| Pump Type | Vane-Type Hydraulic Pump | Product specification |
| Nominal Displacement | 7.0 ml/r | JAR Parts specification |
| Maximum Pressure | 100 bar | JAR Parts specification |
| Controlled Flow Rate | 8.0 L/min | JAR Parts specification |
| Speed Range | 500 – 5000 r/min | JAR Parts specification |
| Inlet Port Size | 17.5 mm | JAR Parts specification |
| Outlet Thread | M12 × 1.25 | JAR Parts specification |
| Rotation Direction | Left-Hand | JAR Parts specification |
| Net Weight | Approx. 2.4 – 5.1 kg | isuzu-truckspares, Persian product page |
| H/S Code | 841360100 | isuzu-truckspares specification |
| Certification | ISO9001 / TS16949 | isuzu-truckspares specification |
| Warranty | 12 Months | FridayParts, isuzu-truckspares |
| Cross-Reference OEM | 8-97136574-1 / 8971365741 | FridayParts |
| Cross-Reference OEM | 8-97115135-0 / 8971151350 | HUSUZO |
| Cross-Reference OEM | 8970851282 / 8-97085128-2 | FridayParts |
| Cross-Reference OEM | 8973886510 / 8973886511 | eBay, Everychina |
| Cross-Reference OEM | 8973572130 / 8973572131 | eBay, Everychina |
| Cross-Reference OEM | 8971365730 | Everychina |
| Cross-Reference OEM | 8-98006793-4 / 8980067934 | isuzu-truckspares |
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF | NKR66 / NKR71 | 4HF1 / 4HG1 | 1994–2002 |
| ISUZU | NPR | NPR66 / NPR70 / NPR71 | 4HF1 / 4HE1 | 1990s–2000s |
| ISUZU | NQR | NQR70 / NQR71 / NQR75 | 4HF1 / 4HE1 / 4HG1T | 1996–2000s |
| ISUZU | NPS | NPS66 / NPS71 | 4HF1 | 1990s–2000s |
| ISUZU | NP / NQ | — | 4HF1 / 4HE1 | — |
| Engine Model | Displacement | Common Applications |
|---|---|---|
| 4HF1 | 4.3L | NPR66, NQR70, NKR66, NPS66 |
| 4HE1 | 4.8L | NPR70, NQR70, NQR75 |
| 4HG1T | 4.6L Turbo | NQR71, NKR71 |
⚠️ Important Fitment Notes:
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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