Brake Master Vacuum Assembly 8-97162800-1 8971628001 For ISUZU NKR NPR N900 K600 4HF1 4HG1 — OEM Direct Fit Vacuum Brake Booster, Verified Replacement
Price:
Negotiable
MOQ:
6 pcs
Delivery Time:
5-8 Work Days
Brand:
YIMI
Product Description
Brake Master Vacuum Assembly 8-97162800-1 8971628001
OEM Direct Fit Vacuum Brake Booster for ISUZU NKR NPR N900 K600 4HF1 4HG1 — Verified Replacement
Product Overview
The Brake Master Vacuum Assembly with OEM numbers 8-97162800-1 / 8971628001 is a verified direct-fit vacuum brake booster for ISUZU NKR, NPR, N900, and K600 series trucks equipped with 4HF1 / 4HG1 diesel engines. This integrated unit combines the brake master cylinder and vacuum booster to amplify pedal force using engine vacuum, ensuring sufficient hydraulic pressure for effective braking in medium-duty commercial trucks.
- OEM Cross-Reference Verified: Replaces 8-97162800-1, 8971628001, 8-97162800-0, 8971628000, 8-97162800-2, 8971628002, 8-97162800-9, 8971628009
- Engine Compatibility Verified: Compatible with 4HF1, 4HG1, 4KH1, 4JH1, 4HK1, and 4HJ1 diesel engines
- Vehicle Application Verified: Designed for ISUZU NKR, NPR, N900, K600, 700P, NQR71, and NQR75 truck models
- Quality Assurance: Brand new — 100% quality inspected with 12-month warranty
Failure Symptoms — When to Replace
- Hard brake pedal: Increased effort required to depress pedal
- Brake booster warning light illuminated: Dashboard alarm with buzzer
- Soft or fading brake pedal: Spongy feel or sinking to floor
- Excessive stopping distance: Longer stopping distance despite normal pressure
- Hissing noise under dashboard: Audible vacuum leak during braking
- Intermittent brake assist loss: Assist fades after 2-3 pedal applications
| Part Number | 8-97162800-1 8971628001 |
|---|---|
| Product Name | Brake Master Vacuum Assembly |
| Car Model | ISUZU NKR NPR N900 K600 |
| Engine Model | ISUZU 4HF1 4HG1 |
| Condition | 100% Brand New |
| Origin | China Mainland |
Vehicle & Engine Compatibility
| Brand | Model / Series | Engine | Years |
|---|---|---|---|
| ISUZU | NKR | 4HF1 / 4HG1 | 1999+ |
| ISUZU | NPR | 4HF1 / 4HG1 | 1999+ |
| ISUZU | N900 | 4HF1 | — |
| ISUZU | K600 | 4HF1 / 4HG1 | — |
| ISUZU | 700P | 4HK1-TC / 4HF1 | — |
| ISUZU | NQR71 | 4HF1 | — |
| ISUZU | NQR75 | 4HF1 / 4HK1 | — |
Important Fitment Notes: Confirm engine variant (4HF1 vs. 4HG1), verify OEM number against engine tag, and ensure engine is running during brake bleeding. This assembly includes both vacuum booster and master cylinder as a combined unit.
Features & Benefits
Integrated vacuum booster + master cylinder
Simplifies installation and ensures matched component performance
Simplifies installation and ensures matched component performance
OEM-grade vacuum diaphragm
Provides consistent brake assist across full pedal travel range
Provides consistent brake assist across full pedal travel range
Multi-engine platform compatibility
One part covers multiple engine types, reducing inventory complexity
One part covers multiple engine types, reducing inventory complexity
Direct-fit replacement
Bolt-on installation without modification
Bolt-on installation without modification
Cross-brand compatibility
Also fits Chevrolet Tiltmaster and GMC Forward models
Also fits Chevrolet Tiltmaster and GMC Forward models
12-month warranty
Comprehensive warranty against manufacturing defects
Comprehensive warranty against manufacturing defects
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| Vacuum diaphragm integrity | Vacuum leak-down pressure test |
| Master cylinder bore dimension | Precision bore gauge inspection |
| Internal seal condition | Visual and pressure inspection |
| Housing weld integrity | Visual and leak test |
| Push rod travel | Dimensional verification |
| Assembly function test | Bench simulation of pedal force amplification |
| Final inspection | 100% quality inspection before packaging |
Each unit undergoes 100% quality inspection before shipment, ensuring reliable performance and safety compliance for commercial vehicle braking systems.
Installation & Maintenance
IMPORTANT: Brake system service requires professional expertise. Always refer to the ISUZU workshop manual. Improper installation can result in brake failure and serious injury. Air in the brake hydraulic circuit reduces braking efficiency.
Installation Guidelines
- Disconnect battery and drain brake fluid from master cylinder reservoir
- Remove vacuum hose from booster check valve; inspect for damage
- Disconnect brake lines from master cylinder; plug lines to prevent contamination
- Remove mounting bolts securing booster to firewall or pedal bracket
- Remove clevis pin connecting booster push rod to brake pedal
- Install new assembly: Position, secure mounting bolts, connect brake lines, attach push rod clevis
- Bleed brake system: Engine must be running during bleeding
- Check vacuum hose: Ensure secure connection between booster and engine vacuum source
- Test brakes: Verify pedal feel, warning light operation, and stopping performance
Maintenance Schedule
- Inspect vacuum hose and check valve every 40,000-50,000 km or annually
- Replace brake fluid every 2 years or per manufacturer specification
- Inspect booster and vacuum system immediately if warning light illuminates or pedal feels abnormal
- When replacing booster, inspect vacuum pump and check valve for wear
Packaging & Supply
- Standard packing: Protective foam and corrugated carton; wooden pallet available for bulk orders
- Package contents: 1 × Brake Master Vacuum Assembly
- Suitable for: Brake system repair shops, fleet maintenance, spare parts distributors
- Related parts available: Vacuum pump, brake master cylinder repair kit, brake fluid, vacuum hose and check valve
Recommended Replacement Interval: When replacing the brake booster, always inspect the vacuum pump and check valve. Consider replacing the vacuum hose and check valve simultaneously to ensure full system integrity.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Yimi (Guangzhou) Automotive Parts Co, Ltd
Location
Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
Contact Person
James