5I8770 Ring for Caterpillar Equipment

5I8770 is a transmission seal ring used in Caterpillar excavators, front shovels, mini hydraulic excavators, and mobile hydraulic power units. The part is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

Fitment

The ring is listed for the following Caterpillar equipment models and series:

Excavators

• 311
• 311B
• 312
• 312B
• 312B L
• 315
• 315B
• 315B FM L
• 315B L
• 317
• 317B LN
• 318B
• 365B II
• 365C
• 365C L
• 385B
• 385C
• 385C FS
• 385C L
• 385C L MH
• 390D
• 390D L
• 390F L

Front Shovels

• 385C
• 5090B

Mini Hydraulic Excavators

• 308E
• 308E CR
• 308E SR

Mobile Hydraulic Power Units

• 385C
• 385C L

Specifications