transmission problem from pull starting 601 workma

Thanks Dave

The last time that I tried to pull start it the bush hog was attatched and dragging on the ground. I was having trouble getting enough traction with my truck to keep it moving. I thought my dad had it in high gear but he had it in 2nd gear. It had just rained so I was having trouble with the traction with my truck and having trouble with the tractor tires slipping instead of turning the engine. Of course it didnt help either that the tractor was in 2nd gear instead of 4rth. So yeas I guess I was pulling it too fast. After trying rpeatedly to start the tractor pulling it faster and faster eventually the engine turned over enough to get the hydraulics working enough to get the bushhog off the ground. So we then decided to pull it out on to the road where we usually pulled it to the top of the hill detatched it and coasted it down a hill starting it in 4rth gear. But, by this time The damage was done and it behaved like it weas in neutral when I let off of the clutch going down the hill. What an unpleasant suprise. I am not sure what kind of transmission or clutch it has. I am considering ordering a repair or service manual for it. I guess that would be a good start in trying to figure out what might be wrong. But, first I have asked my dad to check and make sure he dosen't all ready have a manual on it somewhere. Any advice on how to check the clutch plate etc or do I need to wait until I can locate a manual?