Rear Brake Wheel Cylinder 8-97078617-0 8970786170 8-97179352-0 For ISUZU NPR71 N-Series 4BD1 4HF1 4HG1 — OEM Left Hand Drum Brake Cylinder 1-1/16" Bore

The Rear Brake Wheel Cylinder with OEM numbers 8-97078617-0 (also listed as 8970786170) and 8-97179352-0 (also listed as 8971793520) is a verified OEM-grade direct replacement for ISUZU NPR71 and compatible N-Series trucks equipped with 4BD1 and 4HF1 engines.

Manufactured to ISUZU's stringent OEM specifications, this left-hand rear brake wheel cylinder is a critical component of the drum brake system. It converts hydraulic pressure from the brake master cylinder into mechanical force, pushing the brake shoes against the drum to provide safe and reliable stopping power.

• OEM Specification — Verified by ISUZU OEM part numbers 8-97078617-0, 8970786170, 8-97179352-0, and 8971793520
• Precision 1-1/16" (26.99mm) Bore — Delivers consistent hydraulic pressure for reliable braking performance
• Proven Durability — Constructed from high-grade cast iron with EPDM rubber components for superior heat and corrosion resistance
• Broad Compatibility — Fits ISUZU NPR71, NPR66, NPR70, NPS71, and N-Series trucks with 4BD1, 4HF1, 4HG1 engines

If your rear brake wheel cylinder is failing, you may experience one or more of the following symptoms:

1. Brake Fluid Leakage: Visible fluid seeping from the rear wheels or inside the brake drum — indicates worn seals
2. Soft or Spongy Brake Pedal: Pedal feels unusually soft or goes to the floor — indicates internal seal failure or fluid bypass
3. Reduced Braking Performance: Vehicle takes longer to stop or requires increased pedal pressure
4. Uneven Braking: Vehicle pulls to one side during braking — indicates a seized or leaking cylinder on one side
5. Contaminated Brake Shoes: Brake fluid soaking into the brake shoes, causing reduced friction and brake fade

Our manufacturing and inspection processes ensure every brake wheel cylinder meets or exceeds ISUZU OEM standards.

Pre-Installation Checklist:

• Safely raise the vehicle and support it on jack stands
• Remove the rear wheels and brake drums to access the wheel cylinders
• CRITICAL: This is the Left-Hand (LH) cylinder — the RH counterpart is 8-97078618-0 / 8970786180
• Inspect brake shoes, drums, and hardware for wear — replace as necessary
• Use new brake fluid (DOT 3 or DOT 4) from a sealed container
• Critical: Replace wheel cylinders in pairs (both rear wheels) for balanced braking performance

Installation Guidelines (Reference ISUZU workshop manual):

1. Safely raise the vehicle and support it on jack stands
2. Remove the rear wheels and brake drums
3. Disconnect the brake line from the old wheel cylinder
4. Remove the mounting bolts securing the cylinder to the backing plate
5. Remove the old cylinder and clean the backing plate thoroughly
6. CRITICAL: Install the new cylinder with NEW mounting bolts
7. Torque the mounting bolts to manufacturer's specified torque settings (refer to ISUZU workshop manual)
8. Reconnect the brake line and torque to specification
9. CRITICAL: Bleed the brake system thoroughly to remove all air (start with the wheel furthest from the master cylinder)
10. Refill with fresh DOT 3 or DOT 4 brake fluid
11. Reinstall the brake drums and wheels
12. Test brake pedal feel and braking performance before road test

Maintenance Schedule:

• Inspection: Every 50,000 km / 12 months. Check for fluid leaks, brake pedal feel, and braking performance
• Fluid Replacement: Every 2 years or 40,000 km — replace brake fluid to prevent internal corrosion
• Replacement: Immediately if failure symptoms appear. Replace in pairs for balanced braking

• Packaging: Each brake wheel cylinder is securely packed in protective packaging
• Single Package Weight: Approx. 1.04 kg
• Box Size: 9cm(L) × 7cm(W) × 13cm(H)
• Suitable for: Wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners