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john in la 11-03-2009 06:03:20 72.150.50.177 456070 Report to Moderator	What is a safe distance of over lap for a brush cutter drive shaft. In other words how far should the inner drive line stick into the outer drive line (min) and still be safe??????? 801; 45 hp diesel turning the shaft. I bought this Bush Hog brand cutter with my tractor. I knew it had been re-decked in years past but the job looked OK. I planned to re-deck it again last winter but one thing leads to another and it got put on the back burner. (You do realize I am the worlds best procrastinator; Don't you) I also noticed the drive line was hitting each other (Or very close) when you raised the cutter and felt this was real unsafe so I did cut the shaft down a couple of inches last winter. This past weekend I took the time to see just how bad this cutter deck is. Since I could hit it with a maul and punch holes in the deck I feel the re-deck job is past due. So I am making a list of parts I need when I notice the blade swings about 1 1/2 inches in front of the cutter where the chain guard would go. Anyone what to bet this led to my driveline being to long. Seems when the P O did the deck job he did not deck it but rather did a total rebuild. The problem is (I think) he put the gear box to far forward. So now I am thinking about rebuilding this cutter rather than decking it. This creates a problem because I have already cut the drive line; and moving the gear box back far enough to add chain guards and still leave enough room to clear the tires may make my driveline to short. I have thought about leaving the gear box in place; leaving the sides of the deck as they are; and adding a rounded front between the 3 point arms to move the chain guard forward here. I have also thought about just leaving it like it is and leaving the chain guard off like it has been in the past. So throw me a bone here. Give me some ideas. Sorry I got so long winded. Just making sure I include all the info needed to give me a answer. [Reply]   [No Email]
RickB 11-03-2009 14:28:57 74.209.22.14 456094 Report to Moderator	Hang on! in reply to john in la, 11-03-2009 06:03:20   That looks like a very early Bush Hog 305. The gearbox placement I think is correct. The blades did protrude from the front on 305's and 306's. Front Guard Assembly P/N 6552 was standard equipment on both models and covered the blade tips.   [Reply]   [No Email]
john in la 11-03-2009 18:51:12 72.150.50.177 456127 Report to Moderator	Re: Hang on! in reply to RickB, 11-03-2009 14:28:57   Thank You Rick. This is just what I needed. A little bit of info to stimulate my brain and get me looking into the right direction. This cutter is a model 502 with a hay band. I would guess about 1970 but am not sure I am even close. Serial # is hard to read but looks like 25739. Anyway your post got me to thinking so I did a search on the net and found a parts list. It looks like this model did have the protuding blades and used chain guard 6688-1. A picture of the guard shows a curved part to extend the chain around the protruding blade. Thanks once again for getting me on the right path. Here is a picture from the parts manual that shows what it looked like new.   [Reply]   [No Email]
Dave_from_Texas 11-03-2009 12:39:55 144.177.70.5 456089 Report to Moderator	Re: Bush Hog driveline in reply to john in la, 11-03-2009 06:03:20   If it is to short when you pick the mower up high or go through a ditch, it will come apart. Don't ask me how I know this!   [Reply]   [No Email]
GlenIdaho 11-03-2009 10:32:30 204.228.226.16 456083 Report to Moderator	Re: Bush Hog driveline in reply to john in la, 11-03-2009 06:03:20   Hi John; The Manual for my King Cutter requires a minimum of six inches.   [Reply]   [No Email]
john in la 11-03-2009 11:10:04 72.150.50.177 456085 Report to Moderator	Re: Bush Hog driveline in reply to GlenIdaho, 11-03-2009 10:32:30   6 inches. Thats about what I was thinking but was not sure. I took the driveline loose today and I have 15 inches now so I have some room to work with. Think I will just rebuild this entire thing and make it right.   [Reply]   [No Email]
old 11-03-2009 09:00:07 4.245.2.54 456074 Report to Moderator	Re: Bush Hog driveline in reply to john in la, 11-03-2009 06:03:20   Never hurts to have the 2 parts go in deep but it does hurt if not deep enough. So if when raised and lowered if it does not bind or hit then you are ok. I have had some that had less then a 1/2 inch before the 2 parts would be all the way in and they worked fine but if the 2 parts have less then say 6 inches inside each other that can be a problem   [Reply]   [Send Email]