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Front Brake Wheel Cylinder 8-97139821-0 For Isuzu NPR 4HF1 8971398210
Product Overview
The Front Brake Wheel Cylinder is a premium-quality hydraulic component designed for the front drum brake system of Isuzu NPR series medium-duty trucks equipped with the 4HF1 diesel engine. This direct replacement part converts hydraulic pressure from the master cylinder into mechanical force to push brake shoes against the drum, ensuring balanced and effective braking performance.
Installation steps (typical for front wheel cylinder):
Safely lift and support the vehicle - remove the front wheel and brake drum
Clean the brake assembly - use brake cleaner to remove dust and debris
Disconnect the brake line - from the back of the old wheel cylinder using a flare nut wrench. Cap the line
Remove the old wheel cylinder - unbolt the two mounting bolts from the backing plate
Clean the backing plate mounting surface - remove old gasket/sealant
Compare new cylinder with old - verify bore size, bolt spacing, and port orientation
Install new wheel cylinder - apply a thin film of brake grease to the mounting flange. Bolt to backing plate. Torque bolts to specifiion (typically 10-15 Nm)
Reconnect the brake line - hand-start, then tighten with flare nut wrench. Do not cross-thread
Reinstall brake shoes and hardware - ensure pushrods engage properly
Reinstall brake drum and wheel - adjust shoes if needed
Bleed the brake system - start from the wheel farthest from the master cylinder
Check for leaks - inspect the new cylinder and line fitting
Test drive - ensure proper braking and no pulling
Quality Control
Material Verifiion: 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
Packaging and Delivery
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
Inquiry
For pricing, availability, or bulk purchase of the Front Brake Wheel Cylinder 8-97139821-0 For Isuzu NPR 4HF1 8971398210, please contact our sales team for a competitive quote and expert technical support.
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
