250400159 pad block for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

- Product Name: Shim Block
- Part No.: 250400159
- Applicable Model: XCMG ZL50G, ZL50GL wheel loader
- Main Material: High-quality carbon structural steel
- Forming Process: Cutting, milling, surface grinding
- Surface Treatment: Deburring, anti-rust oil coating
- Thickness Tolerance: Strictly controlled per original drawing requirement
- Flatness Tolerance: High precision flat grinding, low deformation
- Surface Roughness: Ra ≤1.6μm
- Hardness: HB 180~240
- Matching Position: Hinge assembly, support seat and connecting bracket clearance adjustment
- Storage Requirement: Dry and ventilated storage, prevent scratch and rust on the contact surface

▪ Made of high-quality carbon structural steel, with uniform internal texture and stable hardness. It can bear long-term static pressure and periodic impact extrusion, not easy to crush, bend or deform under normal load.
▪ Adopt surface grinding process, two contact planes are smooth and flat, with small flatness error. The force is evenly distributed after installation, avoiding local stress concentration caused by uneven contact surface.
▪ Precise thickness control, consistent size in batches, which can realize accurate clearance matching. It can effectively reduce assembly jitter, abnormal wear and abnormal noise caused by excessive or insufficient gap.
▪ Strictly follow the original design size, outline and mounting benchmark. It can be directly matched with the original assembly position, no need for secondary cutting, grinding or modification on site.
▪ Complete deburring and anti-rust treatment, no sharp edge burrs to scratch the matching parts. The anti-rust oil layer can protect the contact surface during storage and spare parts stocking, prolong the shelf life.

FAQ 

Q1: What is the function of this shim block?
A1: It is used for assembly gap adjustment, load support and positioning limit of the loader’s hinge and bracket assembly, to keep the matching clearance within the design range.

Q2: When do we need to replace the shim block?
A2: When the shim is crushed, deformed, surface severely scratched, thickness changed, or the adjusted clearance cannot meet the technical requirements.

Q3: Can this shim block be used for other loader models?
A3: It is specially designed for ZL50G and ZL50GL. Do not use it on other models without checking the drawing and installation dimensions.

Q4: What should we pay attention to during installation?
A4: Clean the contact surface of the matching parts before installation; remove sand, iron scraps and burrs; place it flat to avoid tilting and single-point stress.

Q5: Can we use multiple shims stacked together for adjustment?
A5: Stacking is allowed in a reasonable range. Too many stacked shims will lead to unstable stress, which is not recommended.

Q6: What problems will be caused by using damaged shim blocks?
A6: The clearance is out of tolerance, parts shake during operation, accelerate pin and bushing wear, and produce continuous abnormal knocking noise.