252100574 boom cylinder to frame pin for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name：Boom Cylinder to Frame Pin
Part Number：252100574
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 cylinder and front frame, matched with bushing
Processing Standard：OEM original drawing standard
Function：Hinge connection, bear shear and impact load, realize swing of boom cylinder
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 generated during boom lifting and lowering.
- 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 cylinder 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 cylinder to frame pin?
A1: It works with hinge bushing, retaining plate and lock pin together, forming complete hinge assembly between boom cylinder and front frame.

Q2: What signs indicate that the boom cylinder to frame pin needs replacement?
A2: Serious surface wear, pin diameter reduction, obvious bending deformation, crack, excessive hinge clearance, abnormal knocking sound when boom lifts and falls.

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

Q7: Can worn pin be repaired by surfacing welding?
A7: Not recommended. Surfacing welding will change the original heat treatment structure, hardness and toughness will be unstable, easy to fail again under impact, better replace new pin directly.