390-3066 Main bearing set CAT spare part

390-3066 Main bearing set CAT spare part Featured Image
  • 390-3066 Main bearing set CAT spare part
  • 390-3066 Main bearing set CAT spare part
  • 390-3066 Main bearing set CAT spare part

Short Description:

383-0470 CAT crankshaft side bearing is bimetallic thin-wall split main bearing shell. It works together with matching thrust shell as a full main bearing set to carry radial crankshaft load for CAT C4.4 engine overhaul.


Product Detail

Product Tags

description

This main bearing set is a complete overhaul kit for C4.4 engine, packed with all side main shells and thrust shell in one kit. Anti-friction alloy lining bonded to steel backing with oil retention grooves maintains stable oil film. It takes radial load and controls crank end play at the same time. Consistent thickness tolerance ensures uniform clearance after assembly. Widely used for 312D2, 318D2, 320GC excavators, skid steer loaders and backhoe loaders.

Part number: 390-3066
Alternative name: Main Bearing Set
Size: STD standard
Kit content: Side main shells + integrated thrust shell
Structure: Split bimetallic thin-wall bearing shell
Material: Carbon Steel
Process: Stamping, alloy casting, inner bore honing, oil groove machining, deburring, sorting as a set
Fit engine: CAT C4.4, 3054C, 3054E
Fit machine: 312D2, 318D2, 320GC, 320GX excavator, 236D, 259D, 279D skid steer loader, 416F2, 420F2 backhoe loader
Function: Support crankshaft, build oil film, bear radial load, control crank end play

Advantages

1. Pre-packaged full set with all main shells and thrust shell, simplifies purchasing and site installation.
2. Sorted in one batch with unified tolerance for balanced radial and axial clearance.
3. Good running-in alloy lining resists seizure under frequent variable load earthmoving conditions.
4. Honed oil grooves distribute oil evenly, stable oil film reduces bearing seizure risk.
5. Tight flatness control on shell back prevents bearing rotation and shifting.
6. OE matched kit fits C4.4 crank journals precisely and reduces assembly errors.

FAQ 

Q1: Is 390-3066 oversize or standard bearing set?
A1: This is STD standard set. Select matching oversize kit for reground crankshaft journals.
Q2: Can I split the set and use only the thrust shell separately?
A2: Splitting is not recommended. Shells are sorted as one set, separate use will cause unbalanced clearance.
Q3: Can shims be added if end play is too big after installation?
A3: No. Check crank thrust surface wear instead of adding shims for compensation.
Q4: How to store the whole bearing set?
A4: Keep in original package, do not split. Protect alloy surfaces and store in dry anti-rust environment.

our warehouse

our warehouse

Pack and ship

Pack and ship


  • Previous:
  • Next:
    • Write your message here and send it to us

    Products categories