Products Description
| Product Name | Isuzu Cab Mount Hydraulic Bushing |
| Kit Quantity | 4 pieces per vehicle set (2 front + 2 rear) |
| Product Dimensions | Front Mount: Outer Diameter Φ110 mm, Inner Hole Φ45 mm, Thickness 65 mm Rear Mount: Outer Diameter Φ110 mm, Inner Hole Φ14.5 mm, Thickness 79 mm |
| Compatible Models | Isuzu N-Series Light-Duty Trucks |
| Material Composition | High-weatherability vibration-damping natural rubber + precision cold-rolled steel inner/outer sleeves + specialized damping hydraulic fluid |
| Product Structure | Disc-type fluid-filled sealed metal-rubber composite bushing |
| Load Conditions | Primarily designed for cab Z-direction vertical floating loads, attenuating low-frequency vibrations transmitted from the road surface and engine |
| Testing Equipment | American MTS831 Elastomer Comprehensive Testing System |
| Applications | Maintenance of cab mounting systems for logistics and freight fleets; OEM-grade cab mount replacement parts procurement for Isuzu N-Series light-duty trucks in the aftermarket |
| Service Life | ≥60,000 km under proper installation and standard load conditions |
| Quality Certifications | ROHS, REACH, ISO9001, IATF16949 |
Product Function & Core Advantages
When the vehicle travels on rough roads, the bushing compresses and deforms along the Z-axis, causing the internal damping fluid to flow back and forth through sealed channels. The fluid friction dissipates vibration energy, providing soft cushioning for minor bumps and stable support for heavy-load impacts. It effectively attenuates low-frequency resonance and in-cabin noise, relieves long-distance driving fatigue, and rectifies cab shaking issues caused by leaking bushings or collapsed rubber.
Product Advantages
1. OEM-Level Stiffness Matching: Calibrated across the full frequency spectrum using the MTS831 elastomer testing system. Static stiffness and 50Hz dynamic stiffness closely match OEM reference parts, with no sudden stiffness increase at high frequencies, fully restoring the original cab NVH isolation characteristics.
2. Million-Cycle Durability Verification: Tested in accordance with Isuzu N-Series light-duty truck cab mounting system bench durability validation specifications. Under 3Hz, 1G±2G cyclic loading and high/low temperature alternating environments, the front mount completed 1.2 million cycles and the rear mount completed 1.25 million cycles. Stiffness degradation and permanent deformation are both controlled within 30% of acceptable limits, with no cracking or leakage.
3. Precision Vulcanization Bonding Process: Inner and outer steel sleeves are precision-machined using CNC equipment. Together with a specialized adhesive system, they are integrally vulcanized and molded under high temperature and high pressure. The rubber-metal interface is fully fused, ensuring no delamination or loosening during long-term service.
4. Multi-Layer Sealing & Leak-Proof Technology: Manufactured using a high-pressure vacuum fluid-filling process combined with a ring-type multi-layer sealing structure. Every finished product undergoes 100% air-tightness inspection, eliminating micro-leakage and effectively avoiding the common problem of premature fluid loss found in low-end hydraulic bushings.
5. Independent Front & Rear Damping Tuning: Front and rear mount bushings feature differentiated sizing and stiffness designs based on the cab's front-to-rear load distribution. When all 4 pieces are replaced as a complete set, the four-point support system maintains balanced load distribution, achieving direct drop-in replacement without modification.
Installation Instructions
Press-fit only – use hydraulic tooling
Installation and removal must be performed using dedicated hydraulic tooling. Pressing force should be applied solely to the outer metal sleeve. Hammer striking of the rubber body, sealing area, or metal housing is not recommended, as impact shock may damage internal fluid passages and cause hidden leakage.
Torque bolts at normal ride height
After all bushings are installed, lower the vehicle to restore normal ride height and load condition before tightening mounting bolts to OEM-specified torque. Avoid tightening bolts while the vehicle is suspended, as this may impose pre-torsional stress on the bushing and accelerate aging.
Intended for cab four-point support locations
This product is designed for the cab four-point support locations. For other chassis areas such as leaf spring shackles or stabilizer bar links, please consult your vehicle manufacturer for the correct bushing type. For best results, replacing all 4 pieces as a complete set is recommended to ensure balanced load distribution and avoid vibration issues.
Suspension Mount Test
Test Conditions: Test range ±3,500 N, Data range ±500 N, dynamic test frequency 50 Hz
| Test Item | Ruidi Product | OEM Reference Part | Generic Aftermarket Part |
|---|---|---|---|
| Front Mount Static Stiffness | 413 N/mm | 410 N/mm | 327 N/mm |
| Front Mount 50Hz Dynamic Stiffness | 592 N/mm | 590 N/mm | 1,000 N/mm |
| Rear Mount Static Stiffness | 209 N/mm | 205 N/mm | 227 N/mm |
| Rear Mount 50Hz Dynamic Stiffness | 305 N/mm | 285 N/mm | 1,000 N/mm |
Test Conclusion: The Ruidi parts are basically the same as the Isuzu benchmark parts.
Durability Test (Based on Japanese Standards)
| Test Item | Test Conditions | Test Results | Verdict |
| Front Suspension Mount | Temperature20°+3° Z-axis static load: 1000N 1000N=1G Z-axis dynamic load: +2G So: Dynamic and static loads: 1G+2G Hz:3Hz After one million tests, the product must not have cracks or leakage : <30%, permanent deformation: <30% |
1.2 million times without leakage or damage Static Stiffness Loss: 330N/mm,<30% Permanent deformation: 2.62mm, <30% |
Qualified |
| Rear Suspension Mount |
Temperature20°+3° Z-axis static load: 450N 450N=1G Z-axis dynamic load: +2G So: Dynamic and static loads:1G+2G Hz:3Hz |
No cracks or leakage were found after 1.25 million attempts. Post-experiment inspection: static stiffness 177N/mm, <30% Permanent deformation: The center moves downward: 2.4mm, <30% |
Qualified |
Company Profile
Langfang Ruidi New Material Technology Co., Ltd., founded in 1987 and headquartered in Tianjin, operates a modern 70,000-square-meter production facility equipped with over 100 sets of advanced machinery. We specialize in providing custom OEM/ODM solutions for the global refrigeration, automotive, and industrial sectors. Our products are widely used in the HVAC, automotive, and rubber hose industries and are exported to Southeast Asia, the Middle East, North America, Africa, and beyond. Our mission is to drive customer success through reliable rubber technology and contribute to a better future.
1. Advanced R&D Capability
We have a professional R&D team with industry experts who have participated in drafting national rubber product standards.
2. Comprehensive Quality Assurance
Our factory is equipped with advanced testing equipment to ensure product reliability from design to mass production.
3. Global Market Experience
Our products are exported to more than 15 countries, including the USA, Japan, Germany, Brazil, and Dubai.
why choose our products?
Structural Engineering Perspective: We design our counterweights not just as heavy objects, but as integrated stabilization systems, considering center of gravity and load distribution.
Precision-Calculated Solutions: We can advise on the optimal weight and placement based on your specific unit model, local wind load requirements, and installation surface, ensuring effective and efficient stabilization.
Rigorous Quality & Consistency: Every block is produced to exact weight tolerances and undergoes quality checks for structural integrity and surface durability.
Complete Stabilization Partner: We offer a full ecosystem of stability products, including vibration isolation pads and mounting frames, allowing for a comprehensive and optimized installation solution.
Tianjin Ruidi International Trade Co., Ltd
Langfang Ruidi New Material Tecnology Co.,LTD
Our address
3001 Maoye Building, Haihe East Road, Hebei District, Tianjin 300140 P.R.China
Phone Number
+86 189 0205 0338
topsales@rubberproduct.net
Inner Pursuit . Altruism Green · Resilience
FAQ
Q1: Hydraulic bushings and solid rubber bushings look the same from the outside. How can I tell them apart?
Q2: Can solid rubber bushings be used as a long-term replacement for this hydraulic bushing?
Q3: Do all 4 bushings have to be replaced together? Can I replace just 2?
Q4: Can a leaking bushing still be used?
Q5: What are the critical points to watch during installation?
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