Cat High Flow Switch

Hi guys just upgraded from 07 272c to a 2014 299d xhp. I need the cat part # for the high flow switch that plugs into the electrical connection on the front of the machine, my local cat guys can't find it. Any help is greatly appreciated. brad

There are 3 versions of the 299D XHP. What Serial Number prefix is your machine, JST, NLC, or DX2..? Also can you post a photo of the switch you are looking for.

I'll see if I can find it. Nige he is referring to the jumper plug on the end of the work tools harness on the loader arm.

Ah, the difference between a harness connector and a switch. Is this it..? I seem to recall someone else having issues with that same one. IIRC it's on a Special Instruction somewhere for installing the work tool harness and pretty much nowhere else. If it's a JST-prefix try Special Instruction REHS7806 which shows a 356-6115 Harness As that would have to be broken down in TMI to find the connector Part Number. Really it all depends on what S/N prefix the machine is, I could be heading off in completely the wrong direction.

Hi guys, the machine prefix is jst. Calling it a plug is really a better description than a switch. All it does is jump two of the pins and tells it a high flow attachment is hooked up. I'm attaching a couple pictures of the old 8 pin plug, I didn't realize they had changed to a 14 pin.

This is the Work Tool connection from the Electrical Schematic of the machine harness. The 14-pin connector is Part Number 344-6145. The wires for the High Flow detection are C460 Blue (Pin K) & C481 Green (Pin N). Looking at the parts breakdown for the 378-3822 Work Tool Harness the mating connector for the 344-6145 is a 344-6144 which makes some sort of sense. The new connector will come "empty" so it will require sockets for the wires - the Part Number is 9W-0844 x however many wires in your harness.

There is a jumper plug to activate the high flow system. Should be a 421-4208. It is the plug assembly with the correct terminals jumpered inside of it.

caterpillarmech said: There is a jumper plug to activate the high flow system. Should be a 421-4208. It is the plug assembly with the correct terminals jumpered inside of it. Click to expand... 421-4208 breaks down to 1 x 346-6144, 2 x 9W-0844, a short length of cable plus various other odds and sods. That would appear to be the one. $120 to you sir .........

Thanks guys that is the part .

Gentlemen, I am a novice and my serial number prefix is DX2. I was told by a Milton CAT Tech to 'jump' pins (M) and (B) to signal to my 299D2XHP that my attachment (which has NO wiring harness) is a high flow attachment capable of operating at 40 GPM output. A friendly expert at 'Just Ask' confirmed this. Can machine damage result if I have this wrong? Or will I suffer only disappointing performance by the attachment (which I assume would be operating at standard flow? Thank you in advance! Tom

Don't use (M). That's a CanBus wire. (B) is definitely Ground. On my 262d3, (K) gets grounded. I just jumpered (K) to (B) From here, youll see that XPS machines get the (K) grounded, whereas the XHP machines get (N) grounded.

When you jump the wires the high flow is activated, with the hydraulics on an icon will appear on your screen, that’s how you know the high flow is actually on.

Hey I was wondering if anyone had any luck with a cold planer harness. We pulled the wires out of the socket. Cat keeps sending me a diagram for 8 wires but I have 9 wires and different colors. Can anyone help with the correct pin out?

What are the odds that it is Caterpillar planer? If it is, model and serial number please. Heck, model number even if it isn't a Caterpillar.

It's a cat pc206 ddg00336

Are you trying to mount the planer on a Cat skid steer.? If yes, can you supply the S/N of the machine. Would you also make a list of the colours and numbers of each wire in your photos above. I can see some of them but not others. The plug in your 2nd photo doesn't look like a typical Deutsch plug as used on Cat equipment unless it's a trick of the photo. Maybe another photo from slightly further away.?

The image of plug is distorted. PC206 came with 8 pin harness. His has 14pin, 3 hose conversion. Thats where the schematic is that I cannot find for him. In the PC206 conversion .... 379-0420

Is this what you're looking for..?

No, Nige. I would have posted that, but, that harness is pre-pinned in the instruction, and it makes no reference to the 14pin connector allocations. He actually needs the pin out locations vs colors of that harness. The electrical schematic of that harness.

Gotcha. I doubt if the electrical pinout/wire colours for that harness are available anywhere other than a factory drawing. I'll ask around and see what turns up. What's strange is that the schematic for the planer clearly shows an 8-pin connector and the poster says he has 9 wires. EDIT: It would be strange if the wire colours & numbers in the "jumper" harness were any different to what's on the machine or what's in the planer though.