1672221 Seal As-Buffer Fits Caterpillar Models

One New Aftermarket Replacement Hydraulic Cylinder Buffer Seal for Caterpillar (Cat) Construction Equipment

This aftermarket replacement Seal As-Buffer (part number 1672221 / 167-2221) is a hydraulic cylinder buffer seal designed for use on Caterpillar (Cat) heavy construction equipment. Buffer seals are installed in hydraulic cylinder rod assemblies to absorb pressure spikes and shock loads, protecting the primary rod seals from premature wear and extending the overall life of the hydraulic cylinder sealing system.

About Buffer Seals

Hydraulic buffer seals are positioned on the high-pressure side of the primary rod seal to intercept pressure peaks generated during heavy-load cycles. Replacing a worn or damaged buffer seal helps prevent fluid bypass, reduces contamination risk, and maintains consistent cylinder performance under demanding operating conditions common to construction and earthmoving equipment.

Compatible Models

Caterpillar (Cat): This part number belongs to the Caterpillar 167-22xx Seal As-Buffer series used across a wide range of Cat construction equipment. Verify fitment using your machine model and serial number before ordering. Compatible machine types include track-type tractors, wheel loaders, backhoe loaders, motor graders, and off-highway trucks.

Replaces Part Number(s):

1672221, 167-2221

New aftermarket replacement part - not remanufactured, not used.