1660344 Seal-Shaft Fits Caterpillar Models

One New Aftermarket Replacement Shaft Seal for Caterpillar (Cat) Equipment

This hydraulic piston pump shaft seal (Caterpillar part 1660344 / 166-0344) is a precision-fit sealing component designed to prevent hydraulic fluid leaks at the pump shaft. It is used across a wide range of Caterpillar construction, compaction, and earthmoving equipment where the hydraulic piston pump requires a reliable shaft seal to maintain system pressure and prevent contamination.

Specifications

• Dimensions: approximately 1.57 in x 1.57 in x 0.24 in (40 mm x 40 mm x 6 mm)
• Application: Hydraulic piston pump shaft seal
• Weight: approx. 0.03 lbs

Compatible Models

Caterpillar Challenger: 35, 45, 55

Caterpillar Vibratory Compactor / Paving Compactor: CP-533C, CP-533D, CP-533E, CP-54, CP-56, CP-563C, CP-563D, CP-563E, CS-531C, CS-531D, CS-533C, CS-533D, CS-533E, CS-54, CS-56, CS-563C, CS-563D, CS-563E

Caterpillar Forest Products: 586C, 2864C

Caterpillar Mining Shovel / Expanded Mining: 5110B, 6015B, 6020B

Caterpillar Motor Grader: 14M3, 14M-3, 16M3, 18M3

Caterpillar Soil / Landfill Compactor: 824C, 824G II, 824H, 824K, 825G II, 825H, 825K, 826G II, 826H, 826K, 834G, 834H, 836G, 836H

Caterpillar Underground Articulated Truck: AD55B, AD60

Caterpillar Wheel Loader: 966G II, 966H, 966K, 966K XE, 966L, 966M, 966M XE, 972G II, 972H, 972K, 972L, 972M, 972M XE, 980G, 980G II, 980H, 980K, 980K HLG, 980L, 980M, 982M, 988G, 988H

Caterpillar Wheel Tractor-Scraper: 621K, 621K OEM, 623K, 627K

Caterpillar Industrial Engine: C9, C9.3, C11, C13, C15, C18, C27, C32

Replaces Part Number(s):

1660344, 166-0344

Aftermarket Interchange Numbers

1279471, 1481201

New aftermarket replacement part - not remanufactured, not used.