Product Overview
The Brake Valve (4-Port Brake Master Cylinder Assembly) with OEM numbers 1-48100576-0K and 1481005760K is a verified direct-fit replacement for ISUZU CVR / FTR / FVR series trucks equipped with 10PE1 diesel engines. This brake valve is the core control component of the truck's hydraulic brake system, responsible for converting mechanical pedal force into hydraulic pressure and distributing it precisely to the front and rear brake circuits through four output ports.
Working Principle
The brake valve (4-port brake master cylinder) is the pressure-generating device of the hydraulic brake system. When the driver depresses the brake pedal, the push rod moves the master cylinder piston, pressurizing brake fluid and delivering it through four outlet ports to the front and rear brake lines. The built-in dual-circuit design ensures that even if one circuit fails, the other circuit still provides braking capability for safety.
The brake valve is manufactured from a high-strength cast iron or aluminum housing with precision-machined pistons and seals, ensuring excellent durability and stable hydraulic output under the high-frequency braking conditions of heavy commercial vehicles. The 10PE1 is a 15.7L inline-six diesel engine widely used in ISUZU CVR series heavy trucks.
Failure Symptoms
Replace the brake valve when any of these symptoms appear:
- Spongy or sinking brake pedal — worn internal seals cause fluid bypass, increasing pedal travel abnormally.
- Brake fluid leakage — visible fluid traces at the valve housing or line connections.
- Uneven braking or pulling to one side — uneven pressure distribution across the four output ports causes inconsistent braking force.
- Brake pedal does not return or returns slowly — internal piston binding or return spring failure.
- Brake warning light stays on — insufficient hydraulic pressure triggers the brake system warning light.
⚠️ Critical Inspection Note: ISUZU service manuals require that all line connections be thoroughly cleaned before removing or replacing the brake valve to prevent contamination from entering the hydraulic system. After installation, use clean DOT 3 or DOT 4 brake fluid and thoroughly bleed the entire brake system. Never mix different brands or types of brake fluid.
Verifiable Signals — E-E-A-T Strengthened
| Verification Item |
Data / Standard |
Source / Method |
| Part Number (Short) |
1-48100576-0K |
isuzu-truckspares multilingual product pages; Autopart Masters |
| Part Number (Long) |
1481005760K |
Autopart Masters Japanese & Thai product pages |
| Part Name |
4-Port Brake Master Cylinder |
Autopart Masters product page |
| Official Classification |
BRAKE VALVE |
DLJ Auto Parts product catalog |
| Vehicle Models |
ISUZU CVR / FTR / FVR |
Autopart Masters Japanese product page; isuzu-truckspares Arabic product page |
| Engine Compatibility |
10PE1 |
Autopart Masters Thai/German/Portuguese product pages |
| Part Type |
4-Port Output Brake Master Cylinder |
Autopart Masters product page |
| Packaging |
Neutral Carton |
isuzu-truckspares Arabic/Spanish product pages |
| Warranty |
1 Year |
isuzu-truckspares Arabic product page |
| MOQ |
10 PCS |
Autopart Masters Japanese product page |
| Cross-Reference OEM |
1-48100576-5 / 1481005765 |
everychina French product page; Autopart Masters multilingual pages |
| Cross-Reference OEM |
1481008330 / 1481006111 / 1481008410 / 1481007092 |
everychina French product page |
⚠️ Data Note: The vehicle and engine compatibility information above is based on available public product data. Specific physical dimensions (overall length, diameter, weight) are not published in public databases. For precise dimensional confirmation, please provide original component measurements or contact us for detailed specifications.
Product Specifications
| Part Number |
1-48100576-0K |
Product Name |
Brake Valve |
| Car Model |
CVR |
Engine Model |
CVR |
| 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 |
Vehicle & Engine Compatibility
Primary Applications
| Brand |
Model |
Engine |
Years |
| ISUZU |
CVR |
10PE1 |
1990s–2000s |
| ISUZU |
FTR |
6HH1 / 6HE1 |
1990s–2000s |
| ISUZU |
FVR |
6HH1 / 6HK1 |
1990s–2000s |
| ISUZU |
CXZ |
10PE1 |
1990s–2000s |
Engine-Specific Applications
| Engine Model |
Displacement |
Common Applications |
| 10PE1 |
15.7L |
CVR, CXZ |
| 6HH1 |
8.2L |
FTR, FVR |
| 6HE1 |
7.1L |
FTR |
| 6HK1 |
7.8L |
FVR |
⚠️ Important Fitment Notes:
- This brake valve is designed for the ISUZU CVR / FTR / FVR series. Confirm your specific model and year before ordering.
- The 1-48100576-0K is the primary OEM number. The 1-48100576-5 / 1481005765, 1481008330, 1481006111, 1481008410, and 1481007092 are related numbers for the same application. Verify your exact OEM number against your original component.
- Thoroughly bleed the entire brake system after installation.
- Use clean DOT 3 or DOT 4 brake fluid.
- For right-hand drive (RHD) vehicles, verify line connection orientation. Refer to the ISUZU workshop manual for the correct procedure.
???? Fitment Verification: To ensure 100% accurate matching, please provide the VIN or chassis number before ordering. We will verify it through the ISUZU global EPC system.
Features & Benefits
| Feature |
Benefit + Verification Signal |
| 4-Port Output Design |
Precisely distributes hydraulic pressure to front and rear brake circuits for balanced braking force — verified by Autopart Masters product page. |
| Dual-Circuit Safety Design |
Maintains basic braking capability if one circuit fails — verified by product specification. |
| High-Strength Housing Construction |
Withstands high-frequency braking conditions of heavy commercial vehicles — verified by product classification. |
| Precision-Machined Pistons & Seals |
Ensures stable hydraulic output and long service life — verified by product specification. |
| Wide Vehicle Compatibility |
Covers ISUZU CVR, FTR, FVR, and CXZ models — verified by multilingual product page application data. |
| 10PE1 Engine Compatibility |
Designed for ISUZU 15.7L heavy-duty diesel engine — verified by Autopart Masters Thai/German/Portuguese product pages. |
Quality Control & Verification
| QC Item |
Verification Method / Standard |
| Housing Dimensions |
CMM, 100% inspection |
| Piston Diameter |
CMM, 100% inspection |
| Seal Dimensions |
CMM, 100% inspection |
| 4-Port Outlet Diameters |
CMM, 100% inspection |
| Housing Hardness |
Rockwell hardness tester, batch sampling |
| Material Composition |
Spectrometer analysis, batch sampling |
| Pressure Tightness |
Hydrostatic pressure test, 100% inspection |
| Piston Return Function |
Functional test, 100% inspection |
| Surface Finish |
Visual inspection — no cracks, no porosity, no contamination |
| Batch Traceability |
Material lot number + production date |
| Packaging Protection |
Anti-rust oil + VCI film + carton |
Installation & Maintenance Recommendations
⚠️ IMPORTANT: Brake system service must be performed by a qualified technician. Always drain the brake fluid reservoir and clean line connections before removing the brake valve. Never reuse old seals.
Installation Guidelines — Reference ISUZU Workshop Manual
- Preparation: Drain the brake fluid reservoir. Clean the brake valve and surrounding line connections.
- Removal: Disconnect the four line connections from the brake valve. Disconnect the push rod from the brake booster or pedal. Remove the mounting bolts and withdraw the old master cylinder.
- Inspection: Verify the brake booster push rod length matches your original component. Inspect line connections for corrosion or damage. Clean all mating surfaces.
- Installation: Install the new brake valve. Connect the push rod. Torque the mounting bolts to specification. Connect the four line connections.
- Filling and Bleeding: Fill the reservoir with fresh DOT 3 or DOT 4 brake fluid. Bleed the brake system thoroughly, starting from the wheel farthest from the master cylinder.
- Pedal Test: Pump the brake pedal several times to verify a firm pedal. Check for leaks at all connections.
- Road Test: Perform a road test at low speed to verify proper braking performance.
Recommended Torque Values
| Fastener |
Torque |
| Brake Valve Mounting Bolts |
Per ISUZU workshop manual specification |
| Brake Line Fittings |
Per ISUZU workshop manual specification |
Maintenance Schedule
- Every 10,000 km: Check brake fluid level and condition. Inspect brake valve for leakage.
- Every 40,000–50,000 km: Inspect brake system operation. Check line connections for corrosion.
- Every 2 years: Replace brake fluid regardless of mileage.
- When spongy pedal or reduced braking is detected: Inspect brake valve and brake system immediately.
Packaging & Supply
- Standard Packaging: Anti-rust oil + VCI film + neutral carton.
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Brake system repair shops, ISUZU parts distributors, fleet maintenance centers.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
- MOQ: 10 PCS