Clutch Master Cylinder with Adjustable Pushrod and EPDM Seals for Direct OEM Replacement in Isuzu NKR77

The Clutch Master Cylinder Assembly (OEM Numbers: 8-98117645-0 / 8981176450 and 8-97300211-0 / 8973002110) is a premium-quality, direct replacement hydraulic component designed for Isuzu NKR77 light-duty trucks equipped with 4JH1T or 4JJ1T diesel engines.

Clutch master cylinder converts mechanical pedal force into hydraulic pressure to disengage the clutch. Enables smooth gear shifting and reliable clutch operation for Isuzu 4JH1T/4JJ1T diesel engines.

• OE Quality: Manufactured to Isuzu dimensional and performance specifications for perfect fit and reliable hydraulic operation
• Complete Assembly: Includes cylinder body, reservoir, pushrod, and seals - ready to install
• Precision-Bored Cylinder: Smooth internal bore ensures consistent piston movement and seal longevity
• High-Quality Seals: EPDM rubber resists brake fluid and temperature extremes, preventing leaks
• Transparent Reservoir: Easy fluid level inspection with "MIN/MAX" markings
• Adjustable Pushrod: Allows fine-tuning of pedal free play
• Restores Clutch Operation: Eliminates spongy pedal, difficult shifting, and fluid leaks
• Direct Replacement: Matches OE mounting holes and hydraulic line port
• Cost-Effective: Affordable alternative to genuine OEM

This clutch master cylinder is specifically designed for Isuzu NKR77 trucks with 4JH1T or 4JJ1T engines.

• ISUZU NKR77 (light-duty truck, 4JH1T / 4JJ1T)
• May also fit other Isuzu models with similar clutch system - verify compatibility

Installation steps (typical):

1. Locate clutch master cylinder on firewall
2. Drain old fluid from reservoir
3. Disconnect hydraulic line (use flare nut wrench). Cap line
4. Disconnect pushrod from clutch pedal (remove clevis pin)
5. Unbolt master cylinder from firewall
6. Compare new cylinder with old (mounting flange, pushrod length)
7. Adjust pushrod length if necessary
8. Install new cylinder and torque mounting nuts to specification (15-25 Nm)
9. Reconnect hydraulic line (use new sealing washer if equipped)
10. Reconnect pushrod to pedal with new cotter pin
11. Fill reservoir with fresh DOT 3/4 fluid
12. Bleed the clutch system (open bleeder on slave cylinder, pump pedal, close, repeat)
13. Check pedal feel (firm, with 5-15mm free play). Adjust pushrod if needed
14. Test drive

• Material Verification: Housing material and seal composition tested
• Dimensional Inspection: Bore diameter, mounting flange pattern, pushrod length verified against OE samples
• Leak Test (Hydraulic): Each cylinder tested for internal and external leakage
• Piston Movement Test: Smooth operation verified throughout full stroke
• Visual Inspection: 100% checked for casting defects, scratches, or damaged threads
• Packaged Safely: Cylinder sealed in plastic bag, boxed with foam

• 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