Brake Master Cylinder Assembly 1.1/4" Bore with DOT 3/DOT 4 Fluid Compatibility for Isuzu 100P NPR 4HG1 OEM Standard Direct Replacement

Premium-quality direct replacement brake master cylinder designed for Isuzu light and medium-duty trucks.

Function: Converts mechanical pedal force into hydraulic pressure to actuate front and rear brakes. 1.1/4" bore provides correct fluid displacement for Isuzu 100P/NPR braking systems.

• OE Quality: Manufactured to Isuzu dimensional and performance specifications
• 1.1/4" Bore: Correct fluid displacement for 100P/NPR94 braking systems
• Precision-Bored Cylinder: Smooth internal bore ensures consistent piston movement
• High-Quality Seals: EPDM rubber resists brake fluid and temperature extremes
• Integral Reservoir: Built-in reservoir with "MIN/MAX" markings
• Leak-Tested: Each cylinder hydraulically tested before shipment
• Direct Replacement: Matches OE mounting holes and line port locations
• 1-Year Warranty: Guaranteed quality and reliability
• High-Quality & Long Life: Durable construction for commercial vehicle applications

This brake master cylinder is specifically designed for Isuzu light/medium-duty trucks.

• ISUZU 100P (N-series light truck)
• ISUZU NPR94 (medium-duty truck)
• ISUZU NPR70 (1999-, 6-stud disc, 4HG1/T 4.6L)
• ISUZU NPR71 (1996-, 6-stud disc, 4HG1/T 4.6L)

• 4JB1 (2.8L diesel)
• 4HG1 (4.6L diesel)
• 4HG1-T (turbo diesel)

Installation steps (overview):

1. Disconnect battery negative cable
2. Remove old master cylinder - disconnect brake lines, unbolt from brake booster
3. Bench-bleed the new master cylinder - Mount in a vise, fill reservoir with brake fluid, push piston manually until no air bubbles exit the ports
4. Install new master cylinder - bolt to booster, torque mounting nuts to specification (typically 15-25 Nm)
5. Reconnect brake lines - hand-start fittings, tighten with flare nut wrench
6. Refill reservoir with fresh DOT 3/DOT 4 fluid
7. Bleed the entire brake system - starting from the farthest wheel (RR, LR, RF, LF)
8. Check for leaks and test brake pedal feel
9. Test drive - verify proper braking performance

• Material Verification: Housing material and seal composition tested
• Dimensional Inspection: Bore diameter, mounting flange pattern, and port threads verified against OE blueprints
• Leak Test (Hydraulic): Each cylinder pressurized to ensure no internal or external leakage
• Piston Movement Test: Smooth operation confirmed over full stroke
• Reservoir Seal Test: Check for cracks or leaks at reservoir attachment
• Visual Inspection: 100% checked for casting defects, scratches, or damaged threads
• Packaged Safely: Cylinder sealed in plastic bag, boxed with foam protection

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea

For pricing, availability, or bulk purchase of the Brake Master Cylinder 8-97129691-0 1.1/4" For Isuzu 100P NPR 4HG1 8971296910, please contact our sales team for a competitive quote and expert technical support.