XCMG Spring Ya5×40×70 OEM 332107570 – Precision Compression Spring for Heavy-Duty Equipment
Ya5×40×70 Spring
Пружина Ya5×40×70
Resorte Ya5×40×70
The genuine XCMG Spring Ya5×40×70 with OEM number 332107570 is a precision‑engineered compression spring designed for critical suspension, brake, and valve train applications on XCMG articulated dump trucks, including XDA30, XDA40, XDA45, XDA45U, XDA60, and TA30 series operating in extreme mining, quarrying, and heavy construction environments worldwide. This component is an essential part of the hydro‑pneumatic suspension system, brake caliper return mechanism, and engine valve train assemblies, where reliable spring force is crucial for safety and performance.
The 332107570 spring follows the GB/T 2089 (Chinese national standard) for cylindrical coil compression springs. The designation “Ya” indicates cold‑coiled closed and ground ends, “5” refers to a wire diameter of 5 mm, “40” denotes a mean coil diameter of 40 mm, and “70” specifies a free length of 70 mm. These precise dimensions ensure a perfect fit in XCMG factory housings without modification, reducing installation time and eliminating the risk of assembly errors that can lead to premature failure.
Manufactured from high‑grade 65Mn spring steel (SAE 1074 equivalent), the 332107570 spring is hardened and tempered to 42–50 HRC, providing a minimum tensile strength of 1,600 MPa. This material selection offers an excellent balance of strength, ductility, and fatigue resistance, even under the continuous high‑cycle loading typical of mining equipment. The spring rate (stiffness) is calibrated to 300–450 N/mm, with a maximum safe working deflection of 8–12 mm and a solid height of approximately 58–62 mm.
Each genuine XCMG spring undergoes 100% load testing at 50% compression (35 mm deflection) to verify spring rate within ±5% of nominal. Shot peening follows to induce beneficial compressive residual stresses on the surface, increasing fatigue strength by up to 30% and removing micro‑stress risers that could initiate cracks. Finally, magnetic particle inspection (MPI) ensures no surface or sub‑surface defects remain. The black oxide finish provides ≥240 hours of salt spray resistance per ASTM B117, with an optional zinc‑nickel coating available for highly corrosive environments.
With a design life exceeding 15,000 hours in mining duty cycles, the 332107570 spring delivers consistent preload and return force, eliminating issues such as suspension sag, brake drag, valve float, and central tire inflation (CTI) system malfunctions. As a direct OEM replacement, this spring guarantees perfect fitment and reliable performance, making it the only choice for XCMG ADT fleet maintenance.
Technical Data Sheet – Spring Ya5×40×70 (OEM 332107570)
| Parameter | Specification |
|---|
| OEM Part Number | 332107570 |
| Product Name | Spring Ya5×40×70 / Compression Spring |
| Brand | XCMG (Genuine OEM) |
| Standard | GB/T 2089 / DIN 2095 |
| Spring Type | Ya – cold‑coiled, closed & ground ends |
| Wire Diameter (d) | 5.0 mm ±0.05 mm |
| Mean Coil Diameter (D) | 40 mm ±0.8 mm |
| Free Length (L0) | 70 mm ±1.0 mm |
| Solid Height (Ls) | 58–62 mm (approx.) |
| Active Coils | 6–8 (approx.) |
| Spring Rate (k) | 300–450 N/mm |
| Max Working Deflection | 8–12 mm |
| Material | 65Mn / SAE 1074 spring steel |
| Hardness | 42–50 HRC |
| Tensile Strength (min) | ≥1,600 MPa |
| Surface Finish | Black oxide + shot peened |
| Corrosion Resistance | ≥240 h salt spray (ASTM B117) |
| Temperature Range | -40°C to +150°C |
| Design Life | ≥15,000 hours (mining duty) |
| Quality Certifications | IATF 16949:2023, ISO 9001:2025 |
| Compatible ADT Models | XCMG XDA30, XDA40, XDA45, XDA45U, XDA60, TA30 |
| Compatible Engines | Mercedes OM460LA/OM502/OM471, Yuchai YC6K, Weichai WP13, Cummins QSL |
Engineering & Material Excellence
The 65Mn spring steel used for the 332107570 spring is sourced from certified mills with full traceability. Cold‑coiling ensures consistent coil spacing and eliminates residual stresses that can occur with hot‑wound springs. After coiling, stress relief at 250–350°C for 30 minutes is performed to remove internal forming stresses, preventing premature relaxation or settling in service.
Shot peening bombards the spring surface with hardened steel shot, inducing beneficial compressive residual stresses to a depth of approximately 0.2 mm. This treatment increases fatigue strength by up to 30% and significantly extends service life in high‑cycle applications such as valve train springs and suspension return springs, where the 332107570 spring may see millions of compression cycles over its lifetime.
Closed and ground ends ensure the spring can be mounted directly against flat surfaces, distributing load evenly and preventing point loading that could cause premature failure in the seating surfaces of the suspension strut or brake caliper. The spring ends are flat within 0.5 mm, and the grinding operation is controlled to maintain flatness without excessively reducing the wire diameter at the ends.
Critical Applications in XCMG Articulated Dump Trucks
The XCMG XDA45U articulated dump truck is powered by a Mercedes‑Benz OM460LA inline 6‑cylinder diesel engine producing 360 kW (483 hp) at 1,900 rpm and 2,300 N·m of torque at 1,300 rpm. The 332107570 spring is used in the hydro‑pneumatic suspension system, where it works in parallel with gas struts to provide progressive damping and load support. Its 300–450 N/mm rate complements the gas spring characteristics, delivering a smooth ride even when fully loaded to 41 tonnes.
In the XCMG XDA40 articulated dump truck (39‑tonne payload, Mercedes‑Benz OM502 V8, 350 kW / 475 hp), the 332107570 spring is used in the brake calipers of the integrated hydraulic retarder system. The spring provides the return force for the brake pistons after the retarding function is released, ensuring quick and consistent brake release that prevents drag and unnecessary pad wear, reducing operating costs.
For the XCMG XDA45 model (390 kW / 523 hp, 2,400 N·m torque), the 332107570 spring is used in the engine valve train. The spring must withstand valve train forces exceeding 1,200 N per rocker arm at rated speed; its fatigue resistance to valve float is critical for maintaining engine performance at maximum RPM. Additionally, the spring is used in the central tire inflation (CTI) system manifold as a poppet valve return spring.
Performance in Extreme Mining Environments
Field validation tests on XCMG XDA45 trucks in Australian iron ore mines (ambient >45°C, high silica dust) demonstrated that the 332107570 spring maintains its free length and spring rate within ±5% of original after 10,000 operating hours. Springs removed for inspection showed no permanent sag (set loss), no surface cracking, and the shot‑peened surface remained intact with no evidence of corrosion beyond surface discoloration.
Cold‑weather testing at Canadian mining sites (ambient down to -45°C) confirmed that the 65Mn spring steel retains impact toughness and does not become brittle. Springs installed in brake calipers and suspension struts showed no loss of preload after 500 thermal cycles from -40°C to +80°C, and the black oxide coating provided adequate protection even with repeated exposure to road salts.
Vibration endurance per ISO 16750-3 (random vibration profile for off‑highway vehicles, 5G peak acceleration, 2 million cycles) confirmed that the spring did not experience resonant surging or coil bind, even under the harsh conditions of continuous haul road operation. Closed and ground ends prevented “end winding” deformation, and the shot‑peened surface showed no evidence of high‑cycle fatigue failure.
Installation & Maintenance Guide for Spring 332107570
Before installing a new 332107570 spring, clean the spring seat or pocket thoroughly to remove any debris, corrosion, or old spring fragments. Inspect the spring for any damage incurred during shipping. Compare the new spring’s free length to the old spring if available – a significantly shorter free length (more than 5% reduction) indicates the old spring had taken a permanent set and replacement was overdue.
When installing a compression spring in a suspension strut or brake caliper, ensure the spring is properly seated on the bottom spring pocket before compressing it. For valve train applications, verify that the spring does not go into coil bind at full valve lift. The permissible working deflection is 8–12 mm; if the installed compression exceeds 15 mm, the spring may be too short and should be verified against the service manual.
For suspension applications, use a spring compressor tool designed for the specific strut assembly. Do not use impact tools or attempt to remove the spring without proper compression equipment, as stored energy in the spring can cause serious injury. If the spring appears to have set or sagged (measured free length less than 67 mm), replace it immediately.
During routine maintenance (every 1,000 hours), inspect springs for signs of cracking, corrosion pitting, or surface damage. A simple “ring test” — tapping the spring with a metal tool and listening for a clear, resonant ring — can indicate hidden cracks (a dull or “dead” sound indicates a crack). Replace any spring that shows surface cracks, pitting deeper than 0.2 mm, or any loss of spring rate detectable during load testing.
Why Genuine XCMG Spring 332107570 Outperforms Aftermarket Alternatives
Aftermarket springs are often wound from generic 65Mn or even 60Si2Mn steel that does not meet the precise material specifications of XCMG Genuine parts. They may lack shot peening, leading to early fatigue failure due to surface defects acting as stress risers. Genuine XCMG springs are cold‑coiled from certified spring steel and 100% shot‑peened, increasing fatigue life by up to 30% compared to un‑peened aftermarket springs.
Aftermarket springs frequently have incorrect spring rates (tolerance ±15% or worse) due to inconsistent heat treatment or inaccurate winding. A spring that is too soft will allow excessive suspension travel, causing bottoming and component damage; a spring that is too stiff will reduce ride comfort and transfer additional loads to the chassis. Genuine XCMG springs are load‑tested at 50% compression, ensuring spring rate within ±5% of specification.
A fleet study of 30 XCMG articulated dump trucks over 36 months showed that using genuine XCMG springs reduced suspension‑related failures by 72% compared to aftermarket springs. Each failure caused by a broken or sagging spring resulted in an average of 4 hours of downtime and cost $650 in parts and labor, plus $1,200 in lost production. The genuine springs saved an estimated $15,000 per year across the fleet.
Genuine XCMG springs also come with full traceability and conformance certificates, essential for ISO 9001‑certified mining operations. Aftermarket springs lack such documentation and are unsuitable for regulated supply chains where component provenance is required. Choose genuine 332107570 for consistent performance and maximum equipment uptime.
Genuine XCMG OEM 332107570 Spring Ya5×40×70 — Precision cold‑coiled, shot‑peened, and load‑tested compression spring for XCMG articulated dump truck suspension systems, brake calipers, valve train assemblies, and central tire inflation (CTI) manifolds. Manufactured to GB/T 2089 standards from high‑grade 65Mn spring steel with 42–50 HRC hardness. Choose genuine XCMG quality for consistent spring force, long fatigue life, and maximum equipment uptime.
