Mobile Equipment Seal Kits

Caterpillar® part numbers are used as a reference only. We do not imply that these parts are original equipment parts.

4 1/4 in Nominal Inner Diameter | Piston Seal

8-1/8 Bronze Bearing

JD-R91727, GRT-63.00X5.39X1.60-C/S

LW-STL-21×3/16sq.-C/S

9-3/8 Bronze Bearing

7 Bronze Bearing

GRT-100.00×5.90×2.00-C/S

SK-I-U-10-1-1/2X2-1/2

These lip-type buffer seals are designed for replacement in Caterpillar® cylinders. The hinged-lip design reduces friction, heat, and wear under low-pressure conditions and acts as a check valve allowing back-pressure relief. Seals for rod sizes 2-1/8” and under do not have a back-up ring.

Urethane Material | 3 in Nominal Inner Diameter | Buffer Seal

These lip-type buffer seals are designed for replacement in Caterpillar® cylinders. The hinged-lip design reduces friction, heat, and wear under low-pressure conditions and acts as a check valve allowing back-pressure relief. Seals for rod sizes 2-1/8” and under do not have a back-up ring.

Urethane Material | 3 1/2 in Nominal Inner Diameter | Buffer Seal