252100576 boom-to-frame pin for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name：Boom-to-frame Pin
Part Number：252100576
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Main Material：Alloy structural steel
Processing Technology：Die forging, CNC turning, quenching & tempering, surface induction hardening
Surface Treatment：Fine grinding and anti-rust protection
Structural Feature：Built-in grease channel for lubrication
Installation Method：Hinged assembly between boom and front frame, matched with bushing
Processing Standard：OEM original drawing standard
Function：Hinge connection, bear shear and impact load, realize rotation of boom assembly
Feature：High wear resistance, strong shear resistance, good impact toughness, high machining precision

- Produced strictly in accordance with OEM drawing specifications, diameter, length and oil passage position fully consistent with original parts, direct replacement without machining, shorten overhaul assembly time.
- Adopt alloy steel forging + composite heat treatment process, hard wear-resistant outer surface and tough core, resist strong shear force and cyclic impact load during loader shovel work.
- Precision grinding outer circle ensures good matching clearance with bushing, reduce friction heat and slow down the wear rate of pin and bushing mating pair.
- Built-in grease channel design, convenient for regular grease filling, form oil film on friction surface, extend service life of hinge assembly.
- Stable dimensional tolerance, not easy to bend or deform under heavy load, effectively prevent excessive clearance and abnormal knocking noise of boom hinge position.
- Standard structural size, easy disassembly and inspection, convenient for daily maintenance and periodic replacement of wearing parts.

FAQ 

Q1: What is the matching accessory of this boom-to-frame pin?
A1: It works with hinge bushing, retaining plate and lock pin together, forming complete hinge assembly between boom and front frame.

Q2: What signs indicate that the boom-to-frame pin needs replacement?
A2: Serious surface wear, pin diameter reduction, obvious bending deformation, crack, severe clearance of hinge joint, abnormal knocking sound when lifting and lowering boom.

Q3: What risks if the worn pin continues to be used?
A3: The hinge gap will continuously increase, boom swings violently during operation, which may cause bushing crushing, pin fracture, and lead to sudden failure of working device and safety accident.

Q4: What points should be paid attention to during installation?
A4: Clean hinge hole and pin surface; check matching bushing for wear; align pin smoothly; install retaining lock part; inject grease after assembly.

Q5: How to maintain this pin in daily operation?
A5: Fill grease through oil passage regularly; inspect pin wear and hinge clearance periodically; avoid long-term overload and violent impact.

Q6: What are the main reasons for pin damage?
A6: Insufficient lubrication, long-term overload operation, sand and dust entering hinge clearance, continuous impact load, material fatigue.