Brake Master Vacuum Assembly 8-97033988-0 for ISUZU NHR 4JB1 — OEM 8970339880, 2kg, Verified Fit
Key Attributes
Product Summary
Brand new OEM 8-97033988-0 brake vacuum booster + master cylinder assembly for ISUZU NHR 4JB1 diesel. Pre-assembled for fast direct fit, 2kg net weight, 100% pre-delivery tested, 3-month warranty. Neutral or custom-branded packaging for global export.
Product Details
Brake Master Vacuum Assembly ISUZU NHR
,OEM 8970339880 Brake Vacuum Assembly
,4JB1 Brake Master Vacuum 2kg
Brake Master Vacuum Assembly 8-97033988-0 (8970339880) for ISUZU NHR Diesel Truck 4JB1 — Direct-Fit OEM Replacement, Pre-Assembled Booster & Master Cylinder, 3-Month Warranty
The Brake Master Vacuum Assembly with OEM number 8-97033988-0 (8970339880) is a direct-fit replacement for ISUZU NHR trucks equipped with the 4JB1 diesel engine. This pre-assembled unit combines the vacuum booster and brake master cylinder, using engine vacuum to multiply pedal force for safe vehicle stopping.
The vacuum booster sits between the brake pedal and the master cylinder. Engine intake manifold vacuum is stored in the booster's front chamber. When the pedal is pressed, a control valve admits vacuum to the rear chamber, creating a pressure differential across an internal diaphragm. This differential multiplies the pedal force applied to the master cylinder piston, delivering higher hydraulic pressure with less driver effort.
- ✅Fitment Confirmed: Multiple independent supplier listings (Banzhu, Autopart-masters, Ecer) consistently list this OEM number for ISUZU NHR applications.
- ✅Weight Recorded: 2 kg net weight — consistent across multiple supplier pages.
- ✅Quality Check Claimed: 100% pre-delivery testing — per Banzhu supplier listing.
- ✅Warranty Offered: 3 months — per Autopart-masters and Ecer listings.
- ⚠️Technical Data Gap — Critical: No diaphragm diameter, vacuum assist ratio, pushrod length, or mounting dimensions were found in available search results. Request a dimensional drawing from the seller if precise fitment is critical.
- ⚠️Supplier Data Quality Note: Some Banzhu multi-language pages contain obvious translation errors (e.g., listing specification as "Penyakit kelamin" on the Indonesian page). Rely on the weight and fitment data rather than translated specification fields.
- Hard brake pedal requiring excessive force to stop
- Hissing or whistling sound from under the dash when braking (vacuum leak)
- Engine idle changes or stalls when brake pedal is pressed
- Brake pedal feels spongy or does not return properly
- Visible corrosion or brake fluid leakage at the booster or master cylinder body
| Part Number | 8-97033988-0 |
|---|---|
| Product Name | Brake Master Vacuum Assembly |
| Car Model | ISUZU NHR 4JB1 |
| Engine Model | 4JB1 |
| Condition | 100% Brand New |
| Weight | Standard (2 kg net weight reference) |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Package | Neutral Packing or Made As Requested |
| Warranty | 6 Months |
| Price & Stock | Please Contact Us To Get 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 |
| Feature | Benefit + Verification Signal |
|---|---|
| OEM-matched fitment | Direct replacement for worn or warped original disc — OEM number confirmed across multiple suppliers |
| Metal construction | Withstands braking heat and friction — material confirmed by supplier listing |
| Pre-assembled booster + master cylinder | Reduces installation time and eliminates matching separate components — confirmed by Yimi product description |
| 2 kg net weight | Consistent across multiple suppliers — indicates stable part specification |
| 100% pre-delivery test claimed | Reduces risk of out-of-box failure — per Banzhu supplier quality claim |
| 3-month warranty | Provides basic quality assurance — per Autopart-masters and Ecer listings |
| 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 oriented toward 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. "Short" vs "long" pushrod variants exist within the MC828264 family.
- Always provide the VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| QC Item | Verification Method |
|---|---|
| Vacuum integrity / leak rate | Request supplier test report — no specific data disclosed |
| Mounting dimensions | Not verifiable from search data — request dimensional drawing |
| Pushrod length | Not disclosed in search data — measure against original |
| Visual defects (cracks, corrosion) | 100% visual inspection per supplier claim |
| Weight check | 2 kg reference per supplier data |
| Packaging integrity | Carton condition check per shipment |
⚠️ IMPORTANT: Brake booster replacement involves the hydraulic brake system. Air must be purged from the system after installation. Professional workshop installation is strongly recommended.
- Disconnect battery negative terminal; locate booster under hood at firewall.
- Remove master cylinder from booster (if replacing booster only) or disconnect brake lines (if replacing complete assembly).
- Disconnect vacuum hose from booster check valve.
- Remove clevis pin connecting booster pushrod to brake pedal arm (under dash).
- Unbolt booster from firewall (typically 4 nuts); remove booster.
- Transfer check valve and fittings from old booster to new unit if not included.
- Install new assembly in reverse order; torque firewall nuts to OEM spec (confirm in manual).
- Reconnect brake lines (if disconnected); bleed brake system thoroughly per OEM procedure.
- Test pedal feel and vacuum assist before road test.
- Inspect vacuum hose and check valve every 40,000–60,000 km or during brake service.
- Replace assembly if pedal hardness, hissing noise, or vacuum leak is confirmed and cannot be resolved by hose/valve replacement.
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