2A3676 Seal Fits Caterpillar Models
2A3676 Seal Fits Caterpillar Models
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One New Aftermarket Replacement O-Ring Seal for Caterpillar (Cat) Track-Type Tractors and Equipment
This aftermarket replacement O-ring seal (Caterpillar part number 2A3676) is a pinion clutch housing seal used on vintage Caterpillar track-type tractors and related equipment. Made from NBR (nitrile) rubber, it is compatible with engine oil, hydraulic oil, diesel fuel, coolant, and automatic transmission fluid applications. The seal is sold individually.
Specifications
- Type: O-Ring / Pinion Clutch Housing Seal
- Material: NBR (Nitrile) - 70 Durometer
- Cross-Section Diameter: 6.99 mm
- Inside Diameter (I.D.): 85.090 mm
- Outside Diameter (O.D.): 99.070 mm
Compatible Models
Caterpillar Track-Type Tractors: D2 (3J, 5J, 4U, 5U series), D4 (8T series and others)
Note: The 8T-series D4 uses a different pinion housing but shares this same O-ring seal. Confirm fitment using your machine model and serial number before ordering.
Replaces Part Number(s):
2A3676
Aftermarket Interchange Numbers
8H2046 (alternate-dimension O-ring used as a substitute by some owners - verify fit before use); CTC-2A3676
New aftermarket replacement part - not remanufactured, not used.
