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HomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsBackup Rings087-5550: 150.20mm Internal Diameter Ring
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsBackup Rings087-5550: 150.20mm Internal Diameter Ring
087-5550: 150.20mm Internal Diameter Ring

Backup Ring

Brand: Cat

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087-5550: 150.20mm Internal Diameter Ring
087-5550: 150.20mm Internal Diameter Ring
087-5550: 150.20mm Internal Diameter Ring
087-5550: 150.20mm Internal Diameter Ring
087-5550: 150.20mm Internal Diameter Ring

Backup Ring

Brand: Cat

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Description
Description

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

Warning:This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

Warning:This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications
Specifications
Units of MeasureUSMetric
Material Description: Nylon Plastic provides good resistance to fuels, oils and lubricants. Many different formulations are used, some of which can support high mechanical loads, and perform well at elevated temperatures.
Cross Section Width (in): 0.07
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Width (mm): 1.9
Cross Section Height (mm): 4.8
Material: Nylon Plastic,Plastic Plastic,Polyamide Plastic,Nylon, 6, 6/12, 6/6 Plastic
Inside Diameter (mm): 150.2
Inside Diameter (in): 5.91
Cross Section Height (in): 0.19
Units of MeasureUSMetric
Material Description: Nylon Plastic provides good resistance to fuels, oils and lubricants. Many different formulations are used, some of which can support high mechanical loads, and perform well at elevated temperatures.
Cross Section Width (in): 0.07
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
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Compatible Models
Compatible Models
Wheel Tractor
631K637K
Generator Set
3512
Wheel Tractor-Scraper
631K637631637K
Track Loader
973D973K
Material Handler
MH3250MH3022M325D L MH
Wheel Loader
950K950M993993K950
Track Feller Buncher
1190T23902391119051122905225211090521B532522B1290T2491
Wheeled Excavator
M325C MHMH3024M318DM318CM318C MHM320FM320D2M322D2 MHM318D MH
Log Loadr Forst Mach
558
Wheel Scraper
637K
Front Shovel
5080385C5090B
Excavator
336E LN340352F340F330 L345B II345B L349330-A L349F LXE349D L330D MH320-A L325D FM LL325B L329D L336D2 LXE323F SA320-A S320-A N336D336E336F349D2 L336F LN XE352350325-A325F LCR323F LN336D2 L355319D330D LN340D2 L319C336F L323F568 FM LL336F XE323D320345C L349E L350-A323318C325-A L325C L318B323D SA345D L VG323D S336D LN320-A319D LN340D L323D L325C FM336323D LN340F L UHD385C FS349E L VG352F XE VG330B L330B LN385B330D FM345B345C345D330-A349 GC336 MHPU320E L325D FM345D L349F L320N336F LNXE325D L330C LN320B320C330-A L349D2319D L330 LN323E L352F-VG336F LN325 L330C L321D LCR336D L323E SA320E LN320B S323F OEM336D2320F L330-A LN320B N336F L XE320B L323E LN350-A L345B II MH365B II330B330C FM330C330DM318320 L336D2 L XE330C MHM325D L MH349D324D L350 L330D L365C336E L325C349E349F325F352 UHD365B
Track-Type Loader
973
Mobile Hyd Power Unit
345D336D L336E HVG330D336D323F OEM
View More
Wheel Tractor
631K637K
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Parts diagram for 087-5550
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 087-5550
View Detailed Parts Diagrams
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Description for part number 087-5550

Description:
Backup Rings prevent seal extrusion in high pressure applications, and may be used to protect the life of overall sealing system from pressure surges.

Attributes:
Cat® Backup Rings are designed in conjunction with the elastomeric seal and mating components, and contribute significantly to the life and performance of the sealing system in high pressure applications.

Backup ring dimensions are consistently held to tight tolerances to ensure they properly bridge the seal groove and the mating surface. Materials are selected for their pressure and abrasion resistance.

Backup rings may be solid or split. Split rings are used for ease of assembly.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
Backup rings are used in high pressure static and dynamic sealing applications, such as hydraulic pumps, valves and engine systems.

View More
Warning:This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications for part number 087-5550

Units of Measure

USMetric
Material Description: Nylon Plastic provides good resistance to fuels, oils and lubricants. Many different formulations are used, some of which can support high mechanical loads, and perform well at elevated temperatures.
Cross Section Width (in): 0.07
Notes: Dimensions and Material Descriptions provided for reference only. Color may differ from image.
Cross Section Width (mm): 1.9
Cross Section Height (mm): 4.8
Material: Nylon Plastic,Plastic Plastic,Polyamide Plastic,Nylon, 6, 6/12, 6/6 Plastic
Inside Diameter (mm): 150.2
Inside Diameter (in): 5.91
Cross Section Height (in): 0.19
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Compatible Models for part number 087-5550

WHEEL TRACTOR

631K 637K

GENERATOR SET

3512

WHEEL TRACTOR-SCRAPER

631K 637 631 637K

TRACK LOADER

973D 973K

MATERIAL HANDLER

MH3250 MH3022 M325D L MH

WHEEL LOADER

950K 950M 993 993K 950

TRACK FELLER BUNCHER

1190T 2390 2391 1190 511 2290 522 521 1090 521B 532 522B 1290T 2491

WHEELED EXCAVATOR

M325C MH MH3024 M318D M318C M318C MH M320F M320D2 M322D2 MH M318D MH

LOG LOADR FORST MACH

558

WHEEL SCRAPER

637K

FRONT SHOVEL

5080 385C 5090B

EXCAVATOR

336E LN 340 352F 340F 330 L 345B II 345B L 349 330-A L 349F LXE 349D L 330D MH 320-A L 325D FM LL 325B L 329D L 336D2 LXE 323F SA 320-A S 320-A N 336D 336E 336F 349D2 L 336F LN XE 352 350 325-A 325F LCR 323F LN 336D2 L 355 319D 330D LN 340D2 L 319C 336F L 323F 568 FM LL 336F XE 323D 320 345C L 349E L 350-A 323 318C 325-A L 325C L 318B 323D SA 345D L VG 323D S 336D LN 320-A 319D LN 340D L 323D L 325C FM 336 323D LN 340F L UHD 385C FS 349E L VG 352F XE VG 330B L 330B LN 385B 330D FM 345B 345C 345D 330-A 349 GC 336 MHPU 320E L 325D FM 345D L 349F L 320N 336F LNXE 325D L 330C LN 320B 320C 330-A L 349D2 319D L 330 LN 323E L 352F-VG 336F LN 325 L 330C L 321D LCR 336D L 323E SA 320E LN 320B S 323F OEM 336D2 320F L 330-A LN 320B N 336F L XE 320B L 323E LN 350-A L 345B II MH 365B II 330B 330C FM 330C 330D M318 320 L 336D2 L XE 330C MH M325D L MH 349D 324D L 350 L 330D L 365C 336E L 325C 349E 349F 325F 352 UHD 365B

TRACK-TYPE LOADER

973

MOBILE HYD POWER UNIT

345D 336D L 336E HVG 330D 336D 323F OEM

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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.

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Remanufactured

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