K4459 8972010610 Non-Asbestos Brake Shoe Assembly for ISUZU NPR94 4HF1 Drum Brake Shoe

The Brake Shoe Assembly with OEM numbers 8972010610 and 8-97201061-0, model K4459, is a verified direct-fit replacement for ISUZU NPR94 / NPR66 / NKR66 / NPS66 / NPR70 / NPS71 series light and medium-duty trucks equipped with 4HF1 / 4HG1 / 4HE1 / 4HJ1 / 4HL1 diesel engines. This brake shoe is the core friction element of the drum brake system, responsible for pressing against the inner surface of the brake drum during braking to convert the vehicle's kinetic energy into heat, achieving deceleration and stopping.

The brake shoe is mounted inside the brake drum on the backing plate and is actuated by the wheel cylinder (hydraulic) or cam (pneumatic). When the brake pedal is depressed, the actuation mechanism expands the shoe outward, pressing the friction lining against the rotating drum's inner surface. The resulting braking torque is transmitted through the backing plate to the axle, slowing the wheel.

The K4459 brake shoe features a Φ 320 mm × 100 mm large-size design, providing ample friction area and thermal capacity for the heavy-duty braking conditions of NPR series commercial trucks. The friction lining is riveted to the shoe platform; compared to bonded construction, riveting offers more reliable mechanical retention under high temperature and heavy load, reducing the risk of lining detachment.

K4459 is a widely applied brake shoe model in the ISUZU ELF/NPR series. According to application data from KASHIYAMA, Fujian Huari, and other suppliers, the same model can cover both front and rear axle configurations on models including NPR66L (4HF1), NPR70 (4HE1), NPS66 (4HF1), and NPR71 (4HG1), spanning production years from the 1990s through the 2010s.

Replace the brake shoe when any of these symptoms appear:

• Grinding or scraping noise during braking — the friction lining is worn to the limit, and the rivets or shoe platform are contacting the drum directly.
• Longer stopping distance or insufficient braking force — the lining is thin or the friction coefficient has dropped, unable to generate sufficient braking torque.
• Braking pull to one side — uneven wear or contamination on one side causes imbalanced braking force.
• Brake pedal pulsation or vibration — uneven lining wear or drum distortion.
• Overheated drum or burning smell — dragging shoes or abnormal friction coefficient causing excessive drum temperature.
• Visible cracks, detachment, or oil contamination on the lining — the friction material has failed and must be replaced immediately.

1. Preparation: Raise the vehicle, remove the wheels and brake drums. Clean the brake assembly.
2. Removal: Remove the return springs, hold-down springs, and adjuster mechanism. Remove the old brake shoes.
3. Inspection: Measure the brake drum inner diameter and roundness. Check the wheel cylinder for leaks. Inspect the backing plate and adjuster mechanism for wear.
4. Installation: Install the new brake shoes, ensuring correct alignment with the pivot and wheel cylinder pistons. Install the hold-down springs and return springs.
5. Adjustment: Adjust the shoe clearance to specification.
6. Bleeding & Road Test: Bleed the brake system. Install the brake drum and wheels, and perform a low-speed road test.

• Standard Packaging: Anti-rust oil + VCI film + neutral carton.
• Custom Packaging: Neutral box, color box, or customer-branded packaging.
• Suitable For: Brake system repair shops, ISUZU parts distributors, fleet maintenance centers.
• Supply Capacity: Stable batch supply with batch-level quality reports available.
• MOQ: Small quantities accepted (quantity discounts available).