OEM Standard Brake Expander for ISUZU CXZ51K 6WF1 - High-Strength Cast Iron/Alloy with 12-Month Warranty
| Weight: | Approx. 3.32 Kg | Installation Position: | Rear Wheel Brake (left/right Side To Be Confirmed) |
| OEM Part Number: | 1-47601087-0 / 1476010870 | Engine Compatibility: | 6WF1 (also Fits 6HK1) |
| Packaging Size: | Approx. 25 × 23 × 25 Cm | Material: | High-strength Cast Iron / Alloy |
| High Light: | OEM Standard Brake Expander,High-strength cast iron Brake Expander,12-month warranty Brake Expander |
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The Brake Expander with OEM number 1-47601087-0 (without hyphen 1476010870) is a verified direct-fit replacement for ISUZU CXZ51K and CYZ51K series heavy trucks equipped with the 6WF1 diesel engine. This expander serves as the core actuator of the air drum brake system, converting force from the brake chamber into expansion force on the brake shoes via a wedge mechanism, pushing the shoes against the brake drum to achieve vehicle braking.
- OEM Standard Dimension Verification: Manufactured to ISUZU OEM standard dimensions with mounting holes matching the original, allowing direct replacement without modification.
- Material Verification: High-strength cast iron/alloy construction, resistant to high pressure and thermal cycling for heavy commercial vehicle braking conditions.
- Function Verification: Wedge-type expansion mechanism functionally tested to ensure sufficient shoe expansion stroke and responsive braking.
- OEM Cross-Reference Verified: Replaces 1-47601087-0 / 1476010870, cross-references MC889050 / 1-47601-087-0 / G410-10000 / S4751-01960 / 47510-EV030.
- Warranty Verification: 12-month warranty; quality inspection reports available per batch.
- Reduced braking force: Noticeably longer stopping distance, requiring more pedal effort for the same braking effect.
- Brake pull: Vehicle pulls to one side during braking due to uneven braking force.
- Brake drag: Wheels retain partial braking force after pedal release, causing hub overheating.
- Braking noise: Metallic scraping or clunking during braking from worn internal components.
- Broken dust boot / grease leakage: Cracked boot, lost grease, and dirt ingress causing early wedge mechanism wear.
- Abnormal brake chamber push rod stroke: Push rod stroke exceeding normal range indicates internal expander wear.
| Part Number: | 1-47601087-0 1476010870 | Product Name: | Brake Expander |
|---|---|---|---|
| Car Model: | CXZ51K | Engine Model: | 6WF1 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | ||
| Package: | Neutral Packing Or Make It As Requested | ||
| 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 | Years |
|---|---|---|---|
| ISUZU | CXZ51K | 6WF1 | Confirm by VIN/chassis number |
| ISUZU | CYZ51K | 6WF1 | Confirm by VIN/chassis number |
| ISUZU | FVR34 | 6HK1 | Confirm by VIN/chassis number |
| ISUZU | CYZ52 / FSR34 | 6HK1 / 6WF1 | Confirm by VIN/chassis number |
- Confirm left/right installation position before ordering; different sides may not be interchangeable.
- Different years and chassis configurations may vary; provide VIN or chassis number for final confirmation.
- Brake system bleeding is mandatory after expander replacement to remove air from lines.
- Inspect brake shoes, drums, and brake chamber push rod condition; replace as needed in the same service.
| Feature | Benefit + Verification Signal |
|---|---|
| Wedge-type expansion mechanism | Efficiently converts chamber force into shoe expansion force for responsive braking — functionally tested. |
| High-strength cast iron/alloy | Resists high pressure and thermal cycling for heavy commercial vehicle braking — material test reports available. |
| Precision machining | Stable mounting dimensions for direct replacement — verified by CMM inspection. |
| Wedge tappet roller heat treatment | Hard, wear-resistant surface prevents early roller indentation — hardness sampled per QC standard. |
| OEM standard mounting dimensions | Direct bolt-on fit without modification — verified against OEM drawing. |
| Dust boot design | Blocks dirt and moisture from wedge mechanism, retains grease — verified by visual and assembly inspection. |
| Pre-greased mechanism | Reduces initial wear and extends service life — lubrication verified before assembly. |
| QC Item | Verification Method |
|---|---|
| Dimensional accuracy | CMM (Coordinate Measuring Machine) |
| Material composition | Spectrometer analysis |
| Body hardness | Brinell/Rockwell hardness tester |
| Wedge tappet roller heat treatment | Surface hardness testing |
| Expansion stroke | Dedicated gauge testing |
| Sealing integrity | Air/hydraulic pressure leak test |
| Piston movement | Manual/pneumatic reciprocation test |
| Surface treatment | Salt spray test (sampling per standard) |
| Visual inspection | 100% visual — no cracks, porosity, or rust |
IMPORTANT: Brake system components affect driving safety. Professional installation with a calibrated torque wrench is strongly recommended.
- Lift and safely support the vehicle; remove the rear wheel.
- Remove the brake drum; extract brake shoes and return springs.
- Disconnect the brake chamber push rod from the expander.
- Remove the expander mounting bolts and extract the old expander.
- Clean the backing plate mounting surface; inspect for deformation or corrosion.
- Install the new expander and tighten mounting bolts to specified torque.
- Connect the brake chamber push rod; install brake shoes and return springs.
- Reinstall drum and wheel; adjust brake clearance.
- Bleed the brake system until the pedal feels firm.
- Road test to confirm proper braking with no pull or drag.
- Inspect expander for leaks and seizure every 10,000 km or at every brake shoe replacement.
- Replace brake fluid every 2 years or per fleet maintenance schedule (if applicable) to prevent internal corrosion.
- Service immediately if reduced braking force, brake pull, or abnormal push rod stroke is detected.
- Neutral carton packaging with individual anti-rust bag.
- Custom branded packaging available (authorization letter required).
- Suitable for: ISUZU truck repair shops, parts wholesalers, fleet maintenance departments.
- MOQ: Please contact for confirmation.
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