An Improved Pinion Shaft on the Bevel Gear Group of the Rear Axle is Now used on Certain 424B Backhoe Loaders {3256, 3258, 3260, 4251} Caterpillar


An Improved Pinion Shaft on the Bevel Gear Group of the Rear Axle is Now used on Certain 424B Backhoe Loaders {3256, 3258, 3260, 4251}

Usage:

424B JRN
Backhoe Loader
424B (S/N: JRN1-UP)
424B2 (S/N: JTH1-463)

Description Of Change: An improved pinion shaft design has been introduced as part of the bevel gear group. The key way slot on the pinion shaft has been modified to reduce the stress concentration. The new design will improve the reliability of the part and increase the service life.

Adaptable To: The new pinion shaft is adaptable to the machines within the listed serial numbers, and is effective with all machines after the listed serial numbers.



Illustration 1g06264017

If the pinion shaft is damaged, replace with the same part number.

Table 1
Parts List 
Qty  Part 
331-8512 Pinion Shaft 

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