228-3621 Crankshaft damper shi CAT spare part

228-3621 Crankshaft damper shi CAT spare part Featured Image
  • 228-3621 Crankshaft damper shi CAT spare part
  • 228-3621 Crankshaft damper shi CAT spare part
  • 228-3621 Crankshaft damper shi CAT spare part

Short Description:

171-7212 CAT repair sleeve (Sleeve-Rep) is a dedicated thin-wall repair bushing for engine overhaul. It restores worn bore dimension and fits heavy-duty CAT construction machinery engines.


Product Detail

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description

This crankshaft damper shim is a matching adjustment part for vibration damper assembly. It is precision machined from carbon steel plate with flat and parallel surfaces and tight thickness tolerance. Adding or removing shims compensates dimensional deviation caused by machining or wear, ensures coaxiality of damper, pulley and crank flange, prevents belt side wear and abnormal damper load. Widely used for calibration of C7/C9 engines in truck engines, motor graders, loaders and generator sets.

Part number: 228-3621
Alternative name: Crankshaft Damper Shim
Inner diameter (mm): 101.5
Thickness (mm): 8.0
Material description: Steel
Outer diameter (mm): 167.0
Material: Alloy Steel, Low Alloy Steel
Process: Laser cutting, surface grinding, deburring, anti-rust treatment
Fit engine: CAT C7, C9, C-9
Fit machine: On-highway truck, motor grader, wheel loader, SR4B generator set, material handler
Mounting position: Interface between crankshaft flange and torsional damper
Function: Axial clearance adjustment, coaxiality correction

Advantages

1. Double-side precision ground with stable flatness, not easy to deform under compression for uniform clearance.
2. Standard 101.5mm inner bore fits crank journal perfectly and keeps centering without offset.
3. Moderate steel hardness, resistant to indentation and edge curling during repeated adjustment.
4. Fine adjustment part, avoids replacing whole damper assembly and reduces overhaul calibration cost.
5. Anti-rust surface treatment prevents corrosion in oil environment and long storage.
6. Multiple shims can be stacked flexibly to cover various clearance compensation demands for field repair.

FAQ 

Q1: Can 228-3621 be stacked with other thickness damper shims?
A1: Stacking is allowed for fine adjustment, but avoid excessive layers to prevent unstable positioning.
Q2: Can shims with scratches be reused?
A2: Light scratches that do not affect flatness are acceptable. Replace warped, dented or deformed shims.
Q3: Is shim replacement mandatory when changing damper?
A3: It is an adjustment shim. Reusable if undamaged. Recheck clearance after disassembly.
Q4: How to store the shims?
A4: Lay flat separately, avoid bending and impact, apply anti-rust oil to prevent rust.

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