Seal Ring 9X3973 for Caterpillar Equipment

Seal ring 9X3973 is a rectangular-section sealing ring used in transmission seal ring applications on Caterpillar equipment. It has a round overall form with a rectangular cross section and is intended to help prevent leakage and contamination at the sealing interface. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by the Caterpillar-style number 9X-3973 and the compact number format 9X3973. The listed dimensions describe the ring itself, while the weight and package dimensions are provided separately below.

Fitment

The seal ring is listed for the following Caterpillar machine models and equipment groups:

• Wheel-type skidder: 508
• Wheel-type skidder: 518
• Wheel-type skidder: FB518
• Wheel-type loader: 930R
• Wheel-type loader: 930T
• Wheel-type loader: 936
• Wheel-type loader: 936E
• Wheel-type loader: G936
• Articulated dump truck: D20D
• Articulated dump truck: D250B
• Articulated dump truck: D250D
• Articulated dump truck: D250E
• Articulated dump truck: D250E II
• Articulated dump truck: D300B
• Articulated dump truck: D300D

Fitment should be verified against the machine model, serial number, and the part number removed during service before installation.

Cross-reference numbers

Both number formats identify the same seal ring listed for the specified Caterpillar equipment applications.

Specifications

Additional dimensions and weight

The rectangular sealing profile provides the specified 0.13 in by 0.13 in cross section. The 14.54 in measurement is the internal diameter of the ring. NBR nitrile is the specified seal material for this part number.