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This adapter makes it possible to run 14-pin CAT D-Series attachments on a loader that has an 8-pin CAT/ASV/Terex (ABC-Series) output. Simply plug the 8-pin end into your machine, connect the 14-pin end to your attachment harness, power up, and the attachment will work as though it were originally wired for 14-pin — no splicing or permanent alterations needed.
It’s especially useful if you own a loader with the older 8-pin control system but want to use newer 14-pin CAT-style attachments without rewiring.
Because most 8-pin CAT/ASV/Terex machines are only wired to support four switched outputs, this adapter will provide:
On the 14-pin side, all connector pins are present — but the actual operational outputs are limited to what the 8-pin machine can supply. That means you won’t gain additional switched circuits beyond those four when using this adapter.
When using this adapter on a CAT machine that supports high-flow hydraulics, there is an internal jumper inside the female connector. Remove the shrink-tubing covering the jumper and insert it into pin “K” or “N” (depending on your model) to enable high-flow functionality. This allows modern 14-pin attachments to use high-flow hydraulics even when machine-side wiring is older.
The 8-pin side is wired for standard CAT ABC-Series pin layout (pins A, B, C, D, E, H). If you are using an ASV loader or ASV-variant attachment which expects a different pin mapping, you may need to move Pin H to Pin G for full compatibility. The adapter kit includes basic pin tools and instructions to help you re-pin if necessary.
Avoid using this adapter if your attachment requires more than the four basic functions (Up/Down, Left/Right), or if the attachment wiring isn’t standard 14-pin CAT D-Series. Because the 8-pin machine output is limited, extra features or additional circuits won’t be supported.
The adapter ships with simple pin insertion/removal tools, enough for occasional re-pinning or setup. For frequent use, maintenance, or if you operate multiple attachments, you may want to upgrade to a commercial-duty Deutsch connector tool for durability and ease of work.
A generic machine-to-attachment adapter guide is available to help with wiring layouts, pin-out verification, high-flow jumper setup, and general installation instructions:
Download the Generic Machine-to-Attachment Adapter User Manual (PDF)
This adapter is assembled using OEM-style Deutsch components and follows standard wiring patterns. However, because some machines may not have full factory electrical control options — and because many attachments (especially used or pre-owned) may have altered wiring — we cannot guarantee that every function will work in every configuration.
Always verify pin-outs on both machine and attachment before powering. If pin relocation is required, use proper Deutsch tools and follow safe wiring practices. When in doubt, consult a qualified technician before operating hydraulics or electrically-controlled attachments.
This adapter allows you to connect newer CAT D-Series 14-pin attachments to older CAT/Terex/ASV style machines that have an 8-pin machine-side port. It converts the 8-pin output of the loader into a standard CAT 14-pin interface for the attachment.
The adapter should be used on loaders or skid steers built with the older CAT/Terex/ASV 8-pin electrical style, and on attachments that follow the newer CAT 14-pin D-Series wiring. Both sides must match these specifications for compatibility.
No — the adapter is plug-and-play. You simply plug the 8-pin side into your machine and the 14-pin side into the attachment. No cutting, splicing, or special tools are required.
Because you’re converting from 8-pin to 14-pin, only basic attachment functions will be supported — such as primary hydraulic controls or simple power/ground circuits (depending on what the 8-pin system supports). Attachments requiring full 14-pin functionality may not work completely when used through this adapter.
Yes. It takes just a few seconds: plug the 8-pin part into your loader’s machine-side port, then plug the attachment’s 14-pin plug into the adapter’s 14-pin side. No tools or rewiring needed.
Not always. Because older 8-pin systems have fewer circuits and less electrical output compared to a full 14-pin system, heavy-duty or multi-function 14-pin attachments may see reduced functionality or may not work at all through this adapter.
Yes. It’s built with rugged connectors suitable for outdoor and heavy-duty conditions. When correctly connected, it provides stable contact and should withstand vibration, dust, and moisture common on job sites.
Yes — as long as the loader uses the older 8-pin port and the attachment uses CAT D-Series 14-pin wiring. You can unplug and reuse the adapter across various compatible machines and attachments without modifications.
First, ensure both connectors are fully seated and locked. Then verify that the loader actually uses an 8-pin CAT/Terex/ASV system and that the attachment is wired to the 14-pin CAT D-Series standard. If it still doesn’t work, it may be due to the 8-pin system lacking the required electrical circuits for that attachment.
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