Corrosion-Resistant Rear Brake Wheel Cylinder with Precision-Machined Bore and EPDM Rubber Seals for Isuzu NKR55 4JB1

The Rear Brake Wheel Cylinder (OEM Numbers: 8-97139841-0 / 8971398410 and 8-94128142-2 / 8941281422) is a premium-quality hydraulic component designed for the rear drum brake system of Isuzu NKR55 light-duty trucks equipped with the 4JB1 diesel engine.

Converts hydraulic pressure from the master cylinder into mechanical force to push brake shoes against the drum. Ensures balanced, effective braking for Isuzu NKR55 4JB1 trucks.

• OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and reliable braking
• Precision-Machined Bore: Smooth honed cylinder bore ensures consistent piston movement and long seal life
• Corrosion-Resistant: Body with anti-corrosion treatment for durability
• High-Quality Rubber Seals: EPDM cups and seals resist DOT 3/DOT 4 brake fluid, heat, and aging
• Dust Boot Included: Protects the bore from dirt and moisture
• Leak-Tested: Each cylinder is hydraulically tested for leakage before packaging
• Restores Braking Performance: Eliminates spongy pedal, fluid leaks, and uneven braking
• Direct Replacement: Matches OE mounting bolt pattern, inlet port location, and bleeder screw position
• Cost-Effective: Affordable alternative to genuine OEM without compromising safety

Isuzu Vehicle Models:

• ISUZU NKR55 (light-duty truck, 4JB1 engine)
• May also fit other Isuzu NKR/NPR models with similar rear brake system - verify

Engine Specification - ISUZU 4JB1:

• 4-Cylinder, Inline Diesel, OHV
• Displacement: 2.8L (2771cc)

Installation steps (typical for rear wheel cylinder):

1. Safely lift and support the vehicle - remove the rear wheel and brake drum
2. Clean the brake assembly - use brake cleaner to remove dust and debris
3. Disconnect the brake line - from the back of the old wheel cylinder using a flare nut wrench. Cap the line
4. Remove the old wheel cylinder - unbolt the two mounting bolts from the backing plate
5. Clean the backing plate mounting surface - remove old gasket/sealant
6. Compare new cylinder with old - verify bore size, bolt spacing, and port orientation
7. Install new wheel cylinder - apply a thin film of brake grease to the mounting flange. Bolt to backing plate. Torque bolts to specification (typically 10-15 Nm)
8. Reconnect the brake line - hand-start, then tighten with flare nut wrench. Do not cross-thread
9. Reinstall brake shoes and hardware - ensure pushrods engage properly
10. Reinstall brake drum and wheel - adjust shoes if needed
11. Bleed the brake system - start from the wheel farthest from the master cylinder
12. Check for leaks - inspect the new cylinder and line fitting
13. Test drive - ensure proper braking and no pulling

• Material Verification: Body alloy and seal compound tested
• Dimensional Inspection: Bore diameter, bolt hole spacing, and thread pitch verified against OE samples
• Leak Test (Hydraulic): Each cylinder pressurized to ensure no internal or external leakage
• Piston Movement Test: Smooth operation confirmed over full stroke
• Thread Inspection: Inlet and bleeder threads checked with GO/NO-GO gauges
• Visual Inspection: 100% checked for casting defects, scratches, or damaged ports
• 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 Rear Brake Wheel Cylinder 8-97139841-0 For Isuzu NKR55 4JB1 8971398410, please contact our sales team for a competitive quote and expert technical support.