ISUZU ELF 700P 4HK1 Hydraulic Brake Booster OEM Direct-Fit with Metal Housing Construction for 4HK1 Engine
| Material: | Metal | Net Weight: | 9.7 KG |
| Mounting Position: | Engine Compartment, Between Brake Pedal And Master Cylinder | Master Cylinder Included: | No (booster Body Only) |
| Engine Compatibility: | 4HK1 / 4HE1 / 4HG1T | Housing Material: | High-strength Aluminum Alloy & Precision Bearings |
| Cooling Type: | Engine Coolant Circulation | Packaging Quantity: | 1 Piece/box |
| High Light: | OEM Direct-Fit Hydraulic Brake Booster,4HK1 Engine Compatibility Brake Booster,Metal Housing Construction Brake Servo Assembly |
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The Hydraulic Brake Booster (BOOSTER; HYDRAULIC BRK) with OEM number 8-98031414-0 — cross-referencing to 8980314140 / 8-97209212-0 / 8972092120 — is a critical safety component of the hydraulic brake system for ISUZU ELF, NPR, NQR, and 700P models equipped with the 4HK1 diesel engine.
The hydraulic brake booster is mounted between the brake pedal and the brake master cylinder. It uses hydraulic pressure supplied by the engine's power steering pump to multiply the force applied by the driver on the brake pedal, then transfers that amplified force to the brake master cylinder. The master cylinder pistons push brake fluid through the brake lines to the wheel brakes at each corner, achieving efficient braking. This component allows the driver to obtain sufficient braking force with reduced pedal effort, making it an indispensable power-assist device in commercial vehicle brake systems.
- Weight & Logistics Data: Net weight 9.7 KG per piece, H/S Code: 870830000 — supports accurate freight and customs cost calculation
- OEM Cross-Reference Verified: Replaces 8980314140 / 8-97209212-0 / 8972092120; CARDONE direct cross-interchange 538440; GM/CHEVROLET indirect cross-interchange 8980314140 / 8972092120
- Installation Fitment: Direct replacement for OEM booster, fits ISUZU ELF/NPR/NQR/700P 4HK1 platforms
- Genuine Reference Price: ISUZU genuine part market reference price approximately $1,499–$1,799 USD
- Abnormally hard brake pedal requiring excessive force to decelerate or stop
- Significantly extended braking distance and delayed brake response
- No pedal drop when depressing brake pedal with engine running (typical sign of booster failure)
- Slow or incomplete pedal return after releasing the brake pedal
- Abnormal air noise or hissing sound from the booster area during braking
| Specification | Details |
|---|---|
| Part Number | 8-98031414-0 8980314140 |
| Product Name | Hydraulic Brake Booster |
| Car Model | 700P |
| Engine Model | 4HK1 |
| 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 |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
| Brand | Model | Engine | Configuration | Years |
|---|---|---|---|---|
| ISUZU | ELF | 4HK1 | — | Verify by VIN |
| ISUZU | 700P | 4HK1 | — | Verify by VIN |
| ISUZU | NPR | 4HK1 | — | 1998–2018 (select years) |
| ISUZU | NQR | 4HK1-TCN (RDQ) | Double Cab & Superlong Chassis | 2011–2013 |
| ISUZU | NQR | 4HK1-TCS (RJS) | Double Cab & Superlong Chassis | 2011–2023 |
| ISUZU | NQR | 4HK1-TCS (RJS) | Single Cab & Superlong Chassis | 2011–2023 |
| ISUZU | NRR | 4HK1-TCN (RDQ) | Double Cab & Superlong Chassis | 2011–2013 |
| ISUZU | NRR | 4HK1-TCS (RJS) | Double Cab & Superlong Chassis | 2011–2023 |
| ISUZU | NRR | 4HK1-TCS (RJS) | Single Cab & Superlong Chassis | 2011–2023 |
Compatible Engine Variants: 4HK1 / 4HK1-TCN / 4HK1-TCS / 4HE1 / 4HG1T
| QC Item | Verification Method |
|---|---|
| Dimensional inspection | CMM coordinate measurement against OEM drawing for key mounting dimensions and port positions |
| Housing sealing | Pneumatic/hydraulic seal test confirming no internal or external leakage |
| Boost ratio test | Bench test confirming boost ratio meets OEM specification |
| Pedal return test | Simulated condition test of pedal return speed and travel |
| Material hardness | Housing material hardness testing to ensure pressure resistance |
| Visual inspection | Visual check for cracks, porosity, corrosion on housing |
| Packaging inspection | Ensure no deformation or damage in transit |
- Disconnect battery negative terminal for safe operation
- Disconnect hydraulic lines from brake master cylinder; plug ports to prevent fluid loss and air ingress
- Remove old booster connections to brake pedal and master cylinder
- Install new booster, ensuring pushrod length matches OEM specification; connect to brake pedal and master cylinder
- Tighten mounting bolts to ISUZU-specified torque (consult workshop manual for specific torque values)
- Reconnect hydraulic lines, refill brake fluid, and perform brake system bleeding
- Start engine and perform the booster function test described above to confirm normal pedal drop
- Conduct low-speed road test to confirm normal braking performance
- Inspect booster appearance, line connections, and leaks at every service interval
- Check overall brake system condition including booster function every 40,000–60,000 km or 2 years
- Inspect booster immediately if hard pedal, extended braking distance, or abnormal noise occurs
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