High-Strength Spring Steel Rear Leaf Spring Assembly with Multi-Leaf Configuration for ISUZU 600P OEM Fit

The Rear Leaf Spring Assembly with OEM numbers 2912010-861F and 2912010861 is a verified direct-fit replacement for ISUZU 600P / NKR / NPR / NQR medium-duty trucks. This critical rear suspension component supports the vehicle's rear axle load, absorbs road shock, and maintains proper suspension geometry under all load conditions.

The rear leaf spring is a load-bearing suspension component composed of multiple spring steel leaves stacked and clamped together. It connects the rear axle housing to the vehicle chassis frame, supporting the vehicle's weight while allowing controlled vertical movement over uneven terrain. The assembly features a multi-leaf configuration with main leaf, second leaf, third leaf, and additional overload leaves, all secured by a center bolt and rebound clips. Spring eyes at both ends are fitted with rubber bushings to isolate vibration and ensure smooth articulation.

• Visible cracks or broken leaves — compromises load-carrying capacity and can cause sudden suspension collapse
• Sagging rear suspension — vehicle sits lower at the rear than normal, indicating spring fatigue
• Excessive bouncing or bottoming out — weakened springs fail to absorb road shocks
• Uneven tire wear on rear axle — misaligned suspension geometry causes irregular wear patterns
• Clunking or knocking noise from rear suspension — loose or worn components allow spring pack to shift
• Vehicle pulling to one side — weakened spring causes asymmetric suspension height

1. Preparation: Raise vehicle on hoist. Support rear axle independently to relieve spring tension. Remove wheels if necessary.
2. Removal: Remove U-bolt nuts and washers. Remove spring shackle pins and bushings. Remove spring eye bolts. Carefully lower old leaf spring assembly.
3. Inspection: Inspect axle housing seat and chassis mounting brackets for wear or damage. Inspect shackle pins and bushings for wear. Clean all mating surfaces.
4. Installation: Position new leaf spring assembly on axle housing. Install center bolt through spring and axle seat. Install U-bolt clamp and new U-bolts. Install spring eye bolts and shackle pins with new bushings.
5. Torque Sequence: Tighten front U-bolt nuts to 106 N·m ± 7.8 N·m (78 lb·ft ± 5.8 lb·ft) in diagonal sequence. Tighten spring eye bolts and shackle pins to specification.
6. Final Check: Verify spring is properly seated and centered on axle. Check U-bolt legs extend evenly beyond nuts.
7. Re-torque: Re-torque U-bolt nuts after first 100 km of driving, then at every scheduled maintenance interval.

• Every 10,000 km: Inspect leaf spring for cracks, broken leaves, or sagging. Check U-bolt torque.
• Every 40,000–50,000 km: Inspect spring bushings and shackle pins for wear. Replace if any abnormality found.
• After any suspension repair: Always replace U-bolts with new units.
• When U-bolts are removed: Always replace with new U-bolts regardless of visual condition.

• Standard Packaging: Anti-rust oil + VCI film + neutral carton + wooden case
• Custom Packaging: Neutral box, color box, or customer-branded packaging
• Suitable For: Suspension repair shops, ISUZU parts distributors, fleet maintenance centers
• Supply Capacity: Stable batch supply with batch-level quality reports available
• Minimum Order Quantity: 2 PCS