Cat hoses are designed to route liquids and gases through machine systems. These hoses are fabricated from superior materials to withstand application specific pressures, vibration tolerances and flow requirements for Cat heavy-duty equipment. Cat hydraulic hose and couplings are subjected to the most rigorous testing processes in the industry. Every Cat hose and coupling combination is tested as a system to ensure a perfect fit that yields maximum safety and dependability
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.
Cat® Hose Assembly Products Warning
Improper selections of hose and coupling combinations will void warranties and may result in serious personal injury or death, property damage, or component and machine system failure. Cat® hose assembly products are designed and tested as a system to achieve a reliable connection, thus maximizing hydraulic system safety and dependability. It is also recommended that appropriate and properly maintained Caterpillar tooling is used to ensure hoses are crimped to specifications. Use of Caterpillar hose with other manufacturer’s couplings or the use of Caterpillar couplings with other manufacturer’s hose may result in the production of unreliable, unsafe or under-performing hose assemblies. It is not recommended or authorized by Caterpillar. For additional information see SAE J1273 section 6.3 and ISO 17165-2 section 6.3.
Cat hoses are designed to route liquids and gases through machine systems. These hoses are fabricated from superior materials to withstand application specific pressures, vibration tolerances and flow requirements for Cat heavy-duty equipment. Cat hydraulic hose and couplings are subjected to the most rigorous testing processes in the industry. Every Cat hose and coupling combination is tested as a system to ensure a perfect fit that yields maximum safety and dependability
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.
Cat® Hose Assembly Products Warning
Improper selections of hose and coupling combinations will void warranties and may result in serious personal injury or death, property damage, or component and machine system failure.
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Specifications
Specifications
Units of MeasureUSMetric
Bulk Unit of Measure: CM
Inside Diameter (in): 1.75
Inside Diameter (mm): 44.45
Dash Size: -28
Outside Diameter (in): 2.32
Outside Diameter (mm): 59
Working Pressure (kPa): 690
Working Pressure (psi): 100
Operating Temperature: -40°C to 100°C
Material: Rubber,Coolant Hose Hose
Application: Oil Resistance
Pressure Capacity (psi): 2760
SAE: SAE 20R1
Units of MeasureUSMetric
Bulk Unit of Measure: CM
Inside Diameter (in): 1.75
Inside Diameter (mm): 44.45
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Compatible Models
Compatible Models
Track-Type Tractor
D7R IID7R SERIES
Underground Art Truck
AD45
Generator Set
C9.3G3306
Marine Engine
3126BC9.3
Excavator
235B235C235D
Water Fording Tractor
D7R II
Gas Engine
G3306BG3306
Shovel
6040
Petroleum Gen Set
G3306B
Hydraulic Shovel
60606040
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Track-Type Tractor
D7R IID7R SERIES
Warranty Information
Return Policy
Parts diagram for 371-8121
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 371-8121
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Description for part number 371-8121
Cat hoses are designed to route liquids and gases through machine systems. These hoses are fabricated from superior materials to withstand application specific pressures, vibration tolerances and flow requirements for Cat heavy-duty equipment. Cat hydraulic hose and couplings are subjected to the most rigorous testing processes in the industry. Every Cat hose and coupling combination is tested as a system to ensure a perfect fit that yields maximum safety and dependability
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.
Cat® Hose Assembly Products Warning
Improper selections of hose and coupling combinations will void warranties and may result in serious personal injury or death, property damage, or component and machine system failure.
View More
Specifications for part number 371-8121
Units of Measure
USMetric
Bulk Unit of Measure: CM
Inside Diameter (in): 1.75
Inside Diameter (mm): 44.45
Dash Size: -28
Outside Diameter (in): 2.32
Outside Diameter (mm): 59
Working Pressure (kPa): 690
Working Pressure (psi): 100
Operating Temperature: -40°C to 100°C
Material: Rubber,Coolant Hose Hose
Application: Oil Resistance
Pressure Capacity (psi): 2760
SAE: SAE 20R1
View More
Compatible Models for part number 371-8121
TRACK-TYPE TRACTOR
D7R II D7R SERIES
UNDERGROUND ART TRUCK
AD45
GENERATOR SET
C9.3 G3306
MARINE ENGINE
3126B C9.3
EXCAVATOR
235B 235C 235D
WATER FORDING TRACTOR
D7R II
GAS ENGINE
G3306B G3306
SHOVEL
6040
PETROLEUM GEN SET
G3306B
HYDRAULIC SHOVEL
6060 6040
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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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