383-0470 Side Bearing CAT spare part

Short Description:

344-2603 CAT crankshaft assembly for 3306 engine is forged one-piece crankshaft with induction hardened journals. It converts piston reciprocating linear motion into rotary power for overhaul of CAT 3306B, 3306C engines fitted on loaders, scrapers and excavators.


Product Detail

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description

This side bearing is the outer main shell of C4.4 main bearing set, with anti-friction alloy lining bonded to steel backing. Oil retention grooves on shell surface maintain stable oil film. It cooperates with thrust shell to share radial load and control journal clearance. Widely used for 312D2, 318D2, 320GC excavators, skid steer loaders and backhoe loaders in standard engine overhaul kits.

Part number: 383-0470
Alternative name: Side Bearing, main bearing shell
Structure: Split bimetallic thin-wall bearing shell
Material: Carbon Steel
Process: Steel stamping, alloy casting, inner bore honing, oil groove machining, deburring
Fit engine: CAT C4.4, 3054C, 3054E
Fit machine: 312D2, 318D2, 320GC, 320GX excavator, 236D, 259D, 279D skid steer loader, 416F2, 420F2 backhoe loader
Mounting position: Outer crankshaft main journals
Matching part: Used together with matching thrust bearing
Function: Support crankshaft, build oil film, bear radial load

Advantages

• Maintains proper alignment of the crankshaft during motion.
• Provides smooth rotational support for the crankshaft.
• Allows quiet and smooth rotational performance.

1. OE matched set with matching thrust shell, uniform tolerance for balanced clearance after assembly.
2. Good running-in alloy lining resists seizure for frequent variable load earthmoving equipment.
3. Even oil distribution from honed grooves maintains stable oil film at high speed and prevents dry friction.
4. Tight flatness control on shell back avoids bearing rotation and shifting after installation.
5. Thin-wall structure improves heat dissipation and reduces overheating risk under continuous operation.
6. Consistent dimension within the set for reliable overhaul and fewer aftersales failures.

FAQ 

Q1: Can 383-0470 side shell be replaced separately while keeping old thrust shell?
A1: Not recommended. Different wear will cause uneven clearance. Full set replacement is preferred.
Q2: Can bearing with light scratches on alloy surface be reused?
A2: Minor scratches without peeling are acceptable for inspection. Replace if flaking, melting or deep scoring exists.
Q3: Is this standard or oversize bearing?
A3: This is standard size. Select matching oversize shells for reground crankshaft journals.
Q4: How to store the bearing shells?
A4: Pack individually, protect alloy surface from impact scratches and store in dry anti-rust condition.

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