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HomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings158-8978: 212.78mm Internal Diameter O-Ring Seal
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings158-8978: 212.78mm Internal Diameter O-Ring Seal
158-8978: 212.78mm Internal Diameter O-Ring Seal

Cat® Rubber O-Ring Seal for Piston Motor

Brand: Cat

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158-8978: 212.78mm Internal Diameter O-Ring Seal
158-8978: 212.78mm Internal Diameter O-Ring Seal
158-8978: 212.78mm Internal Diameter O-Ring Seal
158-8978: 212.78mm Internal Diameter O-Ring Seal
158-8978: 212.78mm Internal Diameter O-Ring Seal

Cat® Rubber O-Ring Seal for Piston Motor

Brand: Cat

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Parts diagram for 158-8978
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Specifications for part number 158-8978

Units of Measure

USMetric
Cross Section Diameter (mm): 3.53
Material: NBR - Nitrile,NBR (90),Nitrile (NBR),Nitrile / NBR / HNBR / XNBR Rubber
Cross Section Diameter (in): 0.139
Inside Diameter (mm): 212.78
Inside Diameter (in): 8.377
Polymer: NBR (Nitrile butadiene)
Material Hardness: 90A
Compatible With: Abrasion resistant; Alpha-Olefin base synthetic lubricants; Ethylene Glycol; Hydrocarbon fuels; Petroleum base lubricants; Silicone oils and greases; Water, water base engine coolants; ORFS, STORS seals
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Compatible Models for part number 158-8978

FORESTRY PRODUCTS

558

FRONT SHOVEL

385C 5090B

EXCAVATOR

390D 390F 374F 345 385C L 365B II FM558 390D L 365C L 390F L 365B L 385C FS 365C L MH 385C L MH 365C 385B 374F L 385C 374D L 345 GC 365B

MATERIAL HANDLER

MH3295

MOBILE HYD POWER UNIT

365C L 385C 390F 385C L

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KeyKey
Factory Fit

This part is designed to fit your Cat equipment based on the manufacturer’s specifications.

Any changes to the manufacturer’s configuration might result in the product not fitting your Cat equipment. Please consult your Cat Dealer before purchasing to ensure that this part is appropriate for your Cat equipment in its current condition and assumed configuration. This indicator cannot guarantee compatibility for all parts.

Remanufactured

Non-Returnable

Kit

Replaced

Remanufactured

Non-Returnable

Kit

Replaced

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