252101861 front chassis for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name：Front Frame
Part Number：252101861
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Main Material：High strength low alloy thick steel plate
Processing Technology：CNC cutting, assembly welding, stress relief annealing, precision boring, NDT flaw detection
Surface Treatment：Heavy-duty anti-rust primer + finish paint
Key Feature：Precision machined hinge pin holes, multiple reinforcing plates at stress positions
Installation Mode：Hinged connection with rear frame via pin shaft; multi-point bolt mounting for working assemblies
Processing Standard：OEM original drawing standard
Function：Main load-bearing base, install working device, front axle and accessories, transfer shovel load impact
Feature：High rigidity, strong torsion resistance, anti-fatigue, stable force transmission, high welding quality

- Manufactured strictly according to OEM drawing specifications, hinge hole position, outer contour and mounting hole layout fully consistent with original parts, direct replacement without secondary processing, shorten equipment overhaul cycle.
- High-strength low alloy steel plate with integrated reinforcing plate structure, welding stress eliminated by annealing treatment, excellent bending and torsion resistance, resist large impact load generated during shovel digging.
- Key hinge holes processed by precision boring to guarantee coaxiality, reduce pin and bushing wear, lower maintenance frequency of hinge connection parts.
- Strict non-destructive inspection for all welding seams before delivery, effectively detect internal welding defects, reduce hidden fracture risk under heavy-duty cyclic load.
- Multi-point force transmission structural design, reasonably disperse concentrated load, avoid local stress fatigue cracking, extend overall service life of the frame.
- Heavy-duty multi-layer anti-corrosion coating, resist mud, water and dust corrosion, suitable for long-time service under harsh outdoor construction environment.

FAQ 

Q1: How does the front and rear frame work together?
A1: Front frame carries working device and front axle, rear frame bears engine, cab and counterweight. They are connected by hinge pin to realize steering function.

Q2: What symptoms mean the front frame needs replacement?
A2: Obvious main weld crack, permanent torsional or bending deformation, serious thinning caused by corrosion, large deformation of hinge holes, abnormal noise and jamming during boom movement.

Q3: What hazard if the cracked front frame continues to work?
A3: The crack will expand rapidly under repeated impact load, may cause frame fracture suddenly during operation, leading to machine damage and major safety accidents.

Q4: What inspections are required for front frame daily maintenance?
A4: Check main welds for cracks; inspect deformation and corrosion status; check wear of hinge holes and bushing; observe abnormal noise during loader operation.

Q5: What precautions during front frame installation?
A5: Clean hinge hole and pin surface thoroughly; align front and rear frame hinge holes; install pin shaft smoothly; mount working devices step by step and tighten all bolts to specified torque.

Q6: Can cracked front frame be welded for repair?
A6: It depends on crack location and size. Main force-bearing weld cracks are high risk. Even after welding repair, fatigue hidden danger still exists. Direct replacement is recommended for safety-critical heavy load use.

Q7: What are main causes of front frame damage?
A7: Long-term overload operation, impact from falling rocks, unreasonable welding technology, residual stress without heat treatment, long cycle load leading to metal fatigue.