252108822 boom for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Boom (Lift Arm)
Part No.: 252108822
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Material: High-strength low-alloy steel plate, welded + stress-relieved
Function: Main load-bearing frame for working device, support rocker, linkage and bucket, realize lifting/lowering with lift cylinder
Matching parts: boom hinge pin, rocker beam pin, bushing, dust seal, grease nipple
Working condition: Heavy alternating bending and torsion combined impact load
Inspection Items: Dimension inspection, weld crack detection, hinge hole concentricity test, hole spacing tolerance and straightness verification

Applicable Scenarios

As the front main load-bearing structure, it cooperates with lift cylinder and bucket linkage for earth excavation, aggregate loading and material stacking. Widely used in quarry, mine, earthwork site and cargo terminal under heavy-duty, high-impact and dusty conditions.

• Manufactured to original geometry and hole layout, lifting stroke and hinge angle match original machine, direct installation
• Box thick-plate structure with robotic welding, uniform weld and stress relief treatment, resist bending and torsion
Precision-bored hinge holes, stable bushing press fit, less play and impact noise
Reinforced high-stress zones, good fatigue performance for mine heavy-load operation
Weld inspection before delivery, eliminate hidden defects for operation safety
One assembly replacement to resolve linkage coordination faults caused by beam deformation
Fully compatible with ZL50G / ZL50GL pins, bushings, rocker, linkage and cylinders
Tight tolerance control, smooth lifting movement without interference at limit stroke

FAQ 

Q：What symptoms occur when the boom is damaged?
A：Obvious jitter during lifting and lowering, insufficient lifting force, unstable lifting speed, frequent hinge noise, bucket shaking and material spillage. In severe cases, weld cracks spread, lifting path tilts, bringing structural fracture risk.

Q：Does lifting jitter always mean boom damage?
A：No. First check lift cylinder internal leakage, pin and bushing wear, rocker and linkage clearance. Confirm boom damage only after eliminating these faults.

Q：Can slightly deformed boom be straightened and welded for long service?
A：Not recommended. The boom is the main load-bearing beam. Straightening and patch welding leave complex residual stress, cracks will reappear under heavy load. New boom is the safe solution.

Q：Can booms of different loader models be interchanged?
A：Not interchangeable. Hole layout, length, cylinder mounting position and leverage ratio are model-specific. Wrong fit causes stroke disorder, jamming and cylinder damage.

Q：What should be noted during boom installation?
A：Follow lifting safety rules. Clean dirt and burrs on all hinge holes. Inspect pins, bushings and dust seals. Align slowly, avoid heavy hammering. Inject grease after assembly and test full lifting stroke.

Q：What causes boom damage most often?
A：Overload, heavy impact on rock, insufficient lubrication of hinge points, and continuous operation after cracks appear.