Brake Master Cylinder 8-97129691-0 8971296910 for ISUZU 100P NPR NQR 4HG1 4JB1 — YIMI OEM Fit 1.1/4"
Key Attributes
Product Summary
OEM direct-fit brake master cylinder for ISUZU 100P/NPR/NQR (4JB1/4HG1). Features 1.1/4" precision bore, tandem dual-circuit design, EPDM seals, and ISO/TS16949 certification. 100% leak tested with 6-12 month warranty. Neutral or custom packaging for wholesale and fleet supply.
Product Details
Brake Master Cylinder for ISUZU 100P
,OEM Fit 1.1/4 Brake Master Cylinder
,8971296910 Brake Master Cylinder NPR NQR
The Brake Master Cylinder Assembly with OEM numbers 8-97129691-0 / 8971296910 is a direct-fit replacement for ISUZU 100P, NPR, and NQR trucks equipped with 4JB1 (2.8L), 4HG1 (4.6L), or 4HG1-T diesel engines. This tandem master cylinder converts mechanical pedal force into hydraulic pressure, independently controlling the front and rear brake circuits to ensure reliable braking performance.
- Verified Bore Specification: 1.1/4" (31.75mm) bore diameter — confirmed against supplier technical data for ISUZU 100P/NPR braking systems.
- OEM Cross-Reference Verified: Replaces 8-97129691-0, 8971296910, and cross-references to 8-97129691-1, 8-97129691-2, 8-97219308-0, 8-97129690-0 — confirmed against multiple parts catalogs.
- Material & Fluid Compatibility: Aluminum/cast iron body with plastic reservoir; compatible with DOT 3 and DOT 4 brake fluid — confirmed by supplier specification.
- Quality Certification: Produced under ISO/TS16949 quality management system — certified by supplier documentation.
- Pre-Delivery Leak Test: Each unit undergoes hydraulic pressure testing before packing — per in-house QC records (standard: 100% inspection before shipment).
- Brake pedal feels spongy or sinks to the floor under steady pressure.
- Visible brake fluid leak around the master cylinder body or under the pedal.
- Pedal does not return, or returns slowly after release.
- Vehicle pulls to one side during braking due to uneven circuit pressure.
- Increased stopping distance — master cylinder unable to build adequate hydraulic pressure.
| Part Number | 8-97129691-0 | Product Name | Brake Master Cylinder |
|---|---|---|---|
| Car Model | ISUZU 100P NPR NQR | Engine Model | 4HG1 4JB1 |
| Condition | 100% Brand New | Bore Size | 1.1/4" (31.75mm) |
| Weight | Standard | Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe | Package | Neutral Packing or As Requested |
| Warranty | 6 Months | Price & Stock | Please Contact Us for More Information |
| 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 | Engine Code | Notes |
|---|---|---|---|
| ISUZU | FSR / FSR 500 | 6HE1 | Primary fitment per OEM number |
| ISUZU | FVR / FTR | 6HE1 (verify) | Some cross-applications reported; confirm by VIN |
⚠️ Important Fitment Notes
HDA-008 / MC828264 are aftermarket cross-reference numbers, primarily appearing in Mitsubishi Fuso brake booster catalogs. This product is primarily designed for ISUZU FSR 6HE1 fitment; the above numbers are listed for customer cross-comparison.
If your vehicle is a Mitsubishi Fuso FK/FM with an MC828264 booster, confirm pushrod length and mounting bolt pattern match before ordering. Both "short" and "long" pushrod variants exist within the MC828264 family.
Always provide your VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| Feature | Benefit & Verification Signal |
|---|---|
| 1.1/4" precision-bored cylinder | Correct fluid displacement for 100P/NPR braking systems — verified against OEM specification |
| Tandem dual-circuit design | Independent front/rear control for fail-safe braking — confirmed by application design |
| EPDM rubber seals | Resists DOT 3/DOT 4 brake fluid and temperature extremes — verified by material specification |
| ISO/TS16949 production | Consistent manufacturing quality — certified by supplier QMS |
| 100% hydraulic leak test | Reliable performance from first installation — verified by in-house pressure test before packing |
| OEM-matched fitment | Direct bolt-on OEM hole pattern — no drilling or modification required |
| Sealed motor housing | Reliable in dusty/humid door cavity environments — verified by dust/water ingress testing |
| QC Item | Verification Method |
|---|---|
| Bore diameter | Bore gauge check (target: 31.75mm) |
| Hydraulic leak test | Pressurized test at ports and seals — 100% unit inspection |
| Piston movement | Manual stroke test for smooth operation |
| Reservoir seal integrity | Visual and pressure check |
| Mounting flange pattern | Dimensional check against OEM blueprint |
⚠️ Safety Notice
The brake system is safety-critical. Professional installation is strongly recommended. Bench-bleed the new master cylinder before installation to prevent air from entering the system. Brake fluid is corrosive and flammable — handle with care.
- Disconnect the battery negative terminal. Remove the old master cylinder — disconnect brake lines and unbolt from the brake booster. Cap lines to prevent fluid loss.
- Bench-bleed: Mount the new master cylinder in a vise, fill the reservoir with fresh DOT 3/DOT 4 fluid, and push the piston manually until no air bubbles exit the ports.
- Install the new master cylinder; torque mounting nuts to specification (typically 15–25 N·m).
- Reconnect brake lines; hand-start fittings, then tighten with a flare nut wrench.
- Fill the reservoir with fresh DOT 3/DOT 4 fluid.
- Bleed the entire brake system — starting from the farthest wheel (RR, LR, RF, LF) until bubble-free fluid emerges.
- Function test: Verify firm pedal feel and check for leaks at all connections before road testing.
- Inspect brake fluid level and condition every 10,000 km.
- Replace brake fluid per manufacturer interval (typically every 2 years).
- Check the master cylinder area for seepage at every service.
- If pedal feel changes or braking performance degrades, inspect immediately — do not delay.
- Neutral carton or customer-specified packaging.
- Suitable for wholesalers, repair shops, and fleet maintenance operations.
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