389-5193 Thrust Bearing CAT spare part

389-5193 Thrust Bearing CAT spare part Featured Image
  • 389-5193 Thrust Bearing CAT spare part
  • 389-5193 Thrust Bearing CAT spare part
  • 389-5193 Thrust Bearing CAT spare part

Short Description:

376-4075 CAT engine crankshaft assembly fits CAT C6.6 electronic diesel engines for 320D GC, 323D, M316D wheel excavators and 12M motor graders. Forged alloy steel with timing gear, converts piston reciprocating linear motion into rotary power for medium earthmoving machine overhaul.


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description

This thrust bearing is a main bearing shell integrated with thrust flanges. It has anti-friction alloy lining on steel backing, and oil retention grooves on thrust faces to build stable oil film and keep crankshaft end play within specification. It absorbs axial impact during load shift and clutch operation, preventing crank end float, gear and seal premature wear. Widely used for 312D2, 318D2, 320GC excavators, 259D skid steer loaders and compact generator sets for C4.4 engine overhaul.

Part number: 389-5193
Alternative name: Thrust Bearing, crankshaft thrust main shell
Structure: Split bimetallic bearing shell with integrated thrust flange
Material: Steel back + lead-tin anti-friction alloy
Process: Steel stamping, alloy casting, inner bore honing, thrust face grooving, deburring
Fit engine: CAT C4.4, 3054C, 3054E
Fit machine: 312D2, 318D2, 320GC excavator, 236D, 259D, 279D skid steer loader, 416F2 backhoe loader
Mounting position: Middle crankshaft main journal
Function: Carry radial load, restrict crank end play, withstand axial thrust

Advantages

1. Integrated thrust flange combines radial support and axial limit, simplifies assembly without separate thrust washers.
2. Precision oil grooves on thrust surface deliver even oil supply and resist dry burning under heavy and reverse load.
3. Good running-in alloy lining tolerates minor wear on crank thrust surface and extends service interval.
4. Tight flatness control on shell back ensures close fit and prevents bearing rotation and shifting.
5. Consistent thickness tolerance maintains stable end play and protects crank gears and oil seals.
6. OE specification, perfectly matched with standard main shells for full engine overhaul sets.

FAQ 

Q1: Can 389-5193 thrust shell be replaced alone without other main bearings?
A1: Single replacement is allowed, but full set replacement is recommended. Recheck crank end play after installation.
Q2: Can thrust shell with light scratches on alloy surface be reused?
A2: Light scratches without peeling or steps are acceptable for temporary use. Replace if alloy flaking, melting or deep scoring occurs.
Q3: Does this thrust bearing fit oversize reground crank journals?
A3: This is standard size. Select matching oversize thrust bearing for regrown crankshaft.
Q4: How to store the thrust bearing?
A4: Protect the thrust working surface, avoid impact damage on alloy lining, pack separately and store in dry environment.

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