6V3989 Nipple-Unvalved for Caterpillar Equipment

The 6V3989 is a straight, unvalved nipple used in the fluid fitting and adapter systems of Caterpillar equipment. It has a 1/4-18 NPT threaded connection and a quick-disconnect connector interface. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The fitting is identified as a steel coupler and is supplied as a nipple-unvalved component. The listed applications include Caterpillar asphalt pavers, wheel-type loaders, and forest machines. The part designation 6V3989 is also written with a hyphen as 6V-3989.

Fitment

The following Caterpillar equipment models are listed for part number 6V3989:

• Asphalt paver Caterpillar AP-1000B
• Asphalt paver Caterpillar AP-1050B
• Asphalt paver Caterpillar AP-1055B
• Asphalt paver Caterpillar AP-650B
• Asphalt paver Caterpillar AP-900B
• Asphalt paver Caterpillar BG-225C
• Asphalt paver Caterpillar BG-240C
• Asphalt paver Caterpillar BG-2455C
• Asphalt paver Caterpillar BG-245C
• Asphalt paver Caterpillar BG-260C
• Wheel-type loader Caterpillar 950E
• Wheel-type loader Caterpillar 950B
• Forest machine Caterpillar 521
• Forest machine Caterpillar 522

Compatibility should be checked against the equipment model and the fitting configuration before installation. The listed models cover the applications specified for this part number and do not indicate compatibility with every machine in the same equipment family.

Cross-reference numbers

• 6V3989
• 6V-3989

6V3989 is the SKU and unhyphenated part number used for this product. 6V-3989 is the hyphenated reference form for the same nipple-unvalved part designation.

Specifications

The 1/4-18 NPT thread identifies the threaded side of the fitting, while the opposite side is configured for a quick-disconnect connection. The part is described as unvalved; no valve function or internal shut-off mechanism is specified for this component.