The Clark part # for the time delay kit is 2823507.

let me see if i can locate it
i will post back here if i can find

update:
ok i searched through all the information i could find on this ignition delay timer and i could not find any wiring diagrams at all, they show it in the parts list but do not show it in the parts diagrams and it is not shown in any of the wiring diagrams. This was an add-on that cat did apparently after production.
I do remember the timer does come with a small schematic in the box with the part that shows how to connect it to the existing ignition system. It is very basic and just hooks into the existing ignition wiring to add a delay to powering up the ignition circuit so the engine can spin up before it starts firing. This was incorporated into the ignition circuit to keep the engine from kicking back against the starter bendix origionally when the engine was first started. Since then they have come up with different ways to eliminate the problem by use of oil pressure switches etc but this timer was first used as a 'quick fix' for that problem. I do believe it should add the delay you seek i just dont have the diagram on how to connect it.
Maybe someone else here knows what this is and has something that can help you more.

Hello
Thank you for your help.
you have a diagram of how to connect an the relay
greets krzysztof

i do not have the clark part number
you will need to contact clark dealer to get that number

i have part number for like a caterpillar with vortec v6
that number is
2001-10 (2001 to 2005) model trucks part number 9040104293
2006-12 (2006 andup) model trucks part number 9302007300

timer may be the same one but i would check with clark first

Okey, but do u have part number or where I buy this?

Thanks

are you refering to a 'start delay timer' ???
these are usually installed on the GM vortec V6 engine starting systems to help eliminate starter failure/damage.