D2 caterpillar main clutch problems

[quote="CATD2ROOKIE"]Hi!
Picked up a d2 cat dozer with a pony motor a few weeks back! and stupidly decided to engage the pony motor! Now of course when I try to turn the pony over to start it the main engine spins. So I need help to disengage it, what do I do? I read a thread where If the main engine flywheel spins fast enough the pony engaging gear will disengage. Then I thought if I towed the dozer in gear the tracks should drive the main motor to disengage the pony. So I put the dozer gearbox in 2nd main clutch disengaged, decomp lever on, and towed it slow with a tractor. But when I went to engage the main clutch it made a grinding noise and would not stay engaged when I pulled the lever back. My thoughts are that the clutch is either stuffed or needs adjustment. So can someone help me with adjusting the main clutch?
thanks[/quote]

There are two levers for your pony motor. Did you disengage the clutch on the pony motor? It snaps in and out. Unless it is stuck you should be able to spin the pony without the main turning. It is the front lever.

I will try disengaging the pony clutch tomorrow and let you know how it goes!
Cheers

Also when pulling the tractor to start it, put it in 5th gear to make a greater mechanical advantage for tracks to turn the engine.

Do you have the decompression lever pulled out to make the main turn easier and have you turned it a few rounds by hand to ensure there is nothing in the cylinders? There have been plenty of these tractors filled with nuts, seeds etc or worse water!

Clutch could be full of stuff too.

Yeah mate i took that little plate off and could see the pinion and latches. Had a go at hitting the latches with a chisel but didnt want to hit it too hard incase something broke! Might have another go tomorrow and see what happens!

[quote="ccjersey"]Also when pulling the tractor to start it, put it in 5th gear to make a greater mechanical advantage for tracks to turn the engine.

Do you have the decompression lever pulled out to make the main turn easier and have you turned it a few rounds by hand to ensure there is nothing in the cylinders? There have been plenty of these tractors filled with nuts, seeds etc or worse water!

Clutch could be full of stuff too.[/quote]
Yeah well i though maybe the clutch is covered in rust or something and thats why it was making a grinding noise.

When I went to tow start dozer to try and disengage pony I:

1. When dozer was at a standstill I placed it in first gear
2. Took decompressor lever off- turned both motors over by hand to check nothing was blocking pistons
3. Put main clutch lever to disengage- hopefully making the engine spin when i took off- clutch all the way back?
4. Chained tractor up and took off slowly
- this was when i noticed the main engine wasnt spinning when i thought it should have been as clutch and gearbox where in gear and clutch disengaged
So i figured maybe if i engage the clutch and disengage it while the tracks where going it might free something up and work
So...
5. While still moving i pushed the main clutch lever forward until it snapped forward and engaged the clutch agagin
6. Then to try and get the clutch to work i slowly pulled it back and it started making a grinding noise and i noticed the motor slowly grabbing and starting to turn over
7. When i went to pull lever all the way back to disengage the clutch fully it stopped making the grinding noise and motor didn't spin or anything
This is my problem (7) when slowly pulling the clutch back while tracks are moving it starts to grab and makes a grinding noise but then a go to pull it all the way back to disengage the clutch it stops the noise and shit all happens - so if you understood what im trying to say would it be rust or something on the clutch or a bad adjustment or is the clutch straight up buggered

Dozer has been sitting for a while (18 years) but was running when it was parked there and had caps etc over exghausts and everything, checked oil and there was no water in it so thats a good thing...........

hope this helps for YOU guys to understand my problem
Cheers

[quote="CATD2ROOKIE"]When I went to tow start dozer to try and disengage pony I:

1. When dozer was at a standstill I placed it in first gear
2. Took decompressor lever off- turned both motors over by hand to check nothing was blocking pistons
3. Put main clutch lever to disengage- hopefully making the engine spin when i took off- clutch all the way back?
4. Chained tractor up and took off slowly
- this was when i noticed the main engine wasnt spinning when i thought it should have been as clutch and gearbox where in gear and clutch disengaged
So i figured maybe if i engage the clutch and disengage it while the tracks where going it might free something up and work
So...
5. While still moving i pushed the main clutch lever forward until it snapped forward and engaged the clutch agagin
6. Then to try and get the clutch to work i slowly pulled it back and it started making a grinding noise and i noticed the motor slowly grabbing and starting to turn over
7. When i went to pull lever all the way back to disengage the clutch fully it stopped making the grinding noise and motor didn't spin or anything
This is my problem (7) when slowly pulling the clutch back while tracks are moving it starts to grab and makes a grinding noise but then a go to pull it all the way back to disengage the clutch it stops the noise and shit all happens - so if you understood what im trying to say would it be rust or something on the clutch or a bad adjustment or is the clutch straight up buggered

Dozer has been sitting for a while (18 years) but was running when it was parked there and had caps etc over exghausts and everything, checked oil and there was no water in it so thats a good thing...........

hope this helps for YOU guys to understand my problem
Cheers[/quote]

A Caterpillar clutch engages when you pull it back and disengages when you push it forward. They are opposite of most hand clutches. According to your post it sounds like you are trying to use the clutch backwards. If you are new to Cats you really need to get a operators manual for your machine and read it. You can do lots of damage in a hurry if you are not doing things right. Normally easy to find manuals on e-bay.
ACMOC has lots of very Cat smart Aussie members. Maybe there is one in your area that will chime in and be able to give you some pointers.

First is the worst...(gear to try & tow it in)...like cc said, put it in 5th to tow.

Where in Qld are You ? I am at Nambour, North of Brisbane , if you are handy I could come and maybe help , give Me a ring on 54414390 anyhow.
As OIH said you pull the Clutch Lever back to Engage , Forward is your clutch brake , [to stop main shaft turning when Changing or engaging Gears].
You could put unit in Gear and Hold steering Clutches back and release them to Get Things Going ,BUT BE CAREFULL .as you have to Pull both steering Clutches back if it Starts . No problem if You leave throttle right Forward and have decompression lever on .But Safety First !!
Did You remove Plug under Clutch Housing to make sure there is no Water or Gunk in there ? LJ