Caterpillar Part reference
Part number 0020639 is cataloged as a pipe adapter, a fitting used to join or transition between pipe connections in a fluid line. The catalog lists it as an adapter-pipe under Caterpillar. It appears in catalog occurrences associated with the Caterpillar AP-600D and AP-655D models, where it is linked to hydraulic-system subgroups. Confirm the exact application against the catalog before ordering.
Recorded applications
Selected catalog references that list this part. A catalog association does not confirm fitment for every machine or configuration.
Catalog context
Model photoCheck the signed-in Part Book for available diagrams and the complete catalog breakdown.
| Part number | Description |
|---|---|
| 0020639 | adapter-pipe (current part) |
| 13***00 | clip; (tab) |
| 14***28 | sensor group-temperature; -hydraulic oil temp |
| 16***51 | adapter |
Selected entries from this catalog unit. Other part numbers are masked. Confirm the full breakdown and your machine configuration before ordering.
View model pageGeneral guidance
In general, a pipe adapter is a fitting that connects one pipe or port to another, often where thread types, sizes or orientations differ between components. In heavy equipment, such fittings help route hydraulic or fluid lines between pumps, tanks, valves and motors. The exact dimensions, materials and thread form of this specific adapter are not stated in the catalog data supplied.
Reference part number 0020639 when requesting this adapter-pipe. Before ordering, check the recorded catalog conditions for the associated machine model and assembly, since the catalog occurrence does not by itself confirm compatibility for every configuration.
Catalog references
Model photo