HERCULES
Caterpillar 1672221 Buffer Ring
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Caterpillar 1672221 Buffer Ring is a rod buffer seal available from WQC Parts.
This listing uses Hercules part number CTC-1672221. Catalog description: BR-95URE-4.750x5.730x0.250grv.
Product Details
- Hercules part number: CTC-1672221
- Product type: Hydraulic sealing or repair component
- Reference brand/application: Caterpillar
- Approximate weight: 0.055 lb
- Catalog data source: 2026 US Seal Catalog
Catalog Application Data
- Catalog section: Rod Buffer Seals
- Style / kit type: CATERPILLAR® SPECIFIC BUFFER SEALS - DYR STYLE
- Material / grade reference: URETHANE
- Temperature range: -22° TO +230° F
- Pressure range: 0 TO 6,000 PSI
- Speed reference: 3 FT/SEC
- Catalog page reference: 219
Understanding This Part
- Material code URE: urethane
- Durometer: 95 (hardness value in the catalog description)
A rod buffer seal is used ahead of the primary rod seal to help manage pressure fluctuations. Match the original buffer profile and its position in the sealing arrangement; a buffer seal and a back-up ring serve different roles.
Urethane is a sealing material valued for resistance to abrasion and cutting.
Durometer describes material hardness: a higher reading means a harder material on the same scale. It is not a pressure rating.
Fitment Verification
Before ordering, confirm the CTC-1672221 reference against your OEM reference number, machine model, cylinder location, bore and rod size, pump/motor series, and serial-number range. Manufacturer names and part numbers are used for identification and fitment reference only. If you are unsure, compare the old parts, measurements, and parts-book callout before installation.