D7 Pony question

Hi Raeme,
you should be able to manually de-latch the pony pinion latches by pushing on the adjustment ends of the latch pawls.
It takes a fairly sharp push to get them to de-latch.
This will stop the pony trying to drive the D/engine.
There should be a little cover in the D/E flywheel housing to do just this as well as adjust the latch throw out RPM.
Toby's tutorial on Pony pinions should help out here.

https://www.youtube.com/watch?v=lKI3wTZU4AA

Toby has others up on the same subject that are well worth the time to watch.
Hope this helps.
Cheers,
Eddie B.

Hi Raeme,
you should be able to manually de-latch the pony pinion latches by pushing on the adjustment ends of the latch pawls.
It takes a fairly sharp push to get them to de-latch.
This will stop the pony trying to drive the D/engine.
There should be a little cover in the D/E flywheel housing to do just this as well as adjust the latch throw out RPM.
Toby's tutorial on Pony pinions should help out here.

https://www.youtube.com/watch?v=lKI3wTZU4AA

Toby has others up on the same subject that are well worth the time to watch.
Hope this helps.
Cheers,
Eddie B.

So the last time you started the main engine, I guess the pinion didn't release? It must be malfunctioning, might need to be cleaned up, and checked well for correct operation.

Hmm that is also a good thought. Thank you, the only thing that makes me wonder on that is that the pinion engage lever feels and sounds like it releasing. Could it do that but the pinion stays in? Which would be remove floor plates and find an inspection plate near flywheel housing on the main? I really appreciate these thoughts guys, thanks for taking the time to reply. It's appreciated.

Hello. So I went back over to the machine. Removed floor plate and main clutch cover. I found a 3/4 drive plug above the pinion latch mech. Removed all and am quite confident that the pinion isn't stuck on flywheel. I can see the helical drive closer to the fuel tank then at least 2 inches of straight spline on the shaft. I also worked the mech back and forth feels and looks free. When I'm turning over the pony I can see the pinion engage sleeve thru the plug hole turning. So that still looks like the pony clutch has stuck and the shaft is turning with the crank. Do you have to remove the whole engine assembly to repair or rebuild he clutch? Thanks

Thank you for that. I soaked the clutch mech up in WD40 I'm hoping that if the clutch plate has cooked to the flywheel etc it will help it release. I'll check out that vid and see if it guides me in the right direction.
Had a radical thought, feel free to tell me if I'm crazy. But what about tow starting the dozer, idle the main engine right down and engage the pony, see if the pony will fire up, that will tell me if the pony has pinched up.. Crazy?

You may have a pinion shaft bearing locked up. Was the oil in the pony transmission up to level?

[quote="Raeme"]Thank you for that. I soaked the clutch mech up in WD40 I'm hoping that if the clutch plate has cooked to the flywheel etc it will help it release. I'll check out that vid and see if it guides me in the right direction.
Had a radical thought, feel free to tell me if I'm crazy. But what about tow starting the dozer, idle the main engine right down and engage the pony, see if the pony will fire up, that will tell me if the pony has pinched up.. Crazy?[/quote]

i doubt that you could ever get it engaged, but don't ever..ever.. do something like that!!

No worries, thought it might have been a kinda nuts idea. I reckon from here I'm going to have to remove the pony and strip it and see what's stuck. Cheers.