An Improved O-Ring Seal Is Now Used On Certain D8 Track-Type Tractor Angle Blade Tilt Cylinders {5104} Caterpillar


An Improved O-Ring Seal Is Now Used On Certain D8 Track-Type Tractor Angle Blade Tilt Cylinders {5104}

Usage:

D8N 5TJ
Track-Type Tractor
D8N (S/N: 5TJ1-UP)
D8R (S/N: MEJ1-UP; RJM1-UP; 7XM1-UP; 9EM1-UP; T5X1-UP)
D8R Series II (S/N: AKA1-UP; 6YZ1-UP)
D8T (S/N: J8B1-UP; FMC1-UP; MLN1-UP; FCT1-UP; KPZ1-UP)

Description Of Change: An improved O-ring seal for D8 6E-0397 Tilt Cylinder Gp and 6E-0398 Cylinder As is used. The new O-ring seal has the following characteristics.

  • Temperature ratings are the same as the former O-ring seal

  • Improved O-ring seal is favorable for higher nominal pressures (heavy-duty versus medium-duty)

  • Improved O-ring seal is less susceptible to abrasion

Table 1
Replacement Parts 
Item  Qty  Part Number  Description  Former Part Number 
493-5233  O-Ring Seal  2K-2939 
Replace former part number 2K-2939 with new part number 493-5233.

Adaptable To: The improved O-ring is available for the machines back to first production.

The improved O-ring is effective with the serial numbers listed in the table below.

Table 2
Tractor Model Effectivity 
Model SN  Adaptable To  Effective With 
D8N  (S/N: 5TJ1-UP) 
D8R  (S/N: 7XM1-UP) 
(S/N: 9EM1-09453) (S/N: 9EM09454-UP) 
(S/N: MEJ1-00206) (S/N: MEJ00207-UP) 
(S/N: RJM1-00336) (S/N: RJM00336-UP) 
(S/N: T5X1-00659) (S/N: T5X00660-UP) 
D8R II  (S/N: 6YZ1-UP) 
(S/N: AKA1-UP)
D8T  (S/N: FCT1-01643)  (S/N: FCT01644-UP) 
(S/N: FMC1-00599) (S/N: FMC00600-UP) 
(S/N: J8B1-05135) (S/N: J8B05136-UP) 
(S/N: KPZ1-UP)
(S/N: MLN1-02026) (S/N: MLN02027-UP) 

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