763 Tilt Cylinder - need to identify for parts Please help!

[turbomoparboy]

Hi Everyone, I need to rebuild my tilt cylinder from my 763. I ended up pretty much destroying the head to get it off. The rod and cylinder are all in good shape. I ordered a new head and seal kit and the head is too big. The new head measures approx 3.5" which should be correct since the parts descriptions show the 763 as having a 3.5" bore. My old head is 3.25" and the piston measures a few thousands under 3.25 so my cylinder is a 3.25 bore. The new head looks exactily as mine except for the diameter. The rod on mine is 1.5" and is the same on the new head. My machine appears to be one of the first 50 produced so I am not sure if they grabed a left over cylinder when it was built. My research came up with the 753 having a 3.25" bore as well as other machines built in the early 90's then they went to the 3.5 bore. The head part number for the early 90's 753, 7757 and a few others when it was 3.25" is 6539185 and the head I have is 6539934. Has anyone ever come across this problem or know how I can find out more info or where the part numbers are stamped into the cylinder? I really hate to spend a grand on a new cylinder since mine is in good shape. I wish I could locate a delear or wholesaler who has the part and ask them to compare it and since most delears don't appear to take returns on special orders I am a little nervious about the $200 gable if it is the right number. The only other head number I found is 6529680 but that appears to have been used in the 80's. Thanks, Justin

 

[HarryN]

I have a 1999 763 so I don't know if this helps you. I just when through this. Here's my take. I destroyed my gland nut when trying to remove from cylinder. I was pissed. It looks like such a simple job, and it is IF the gland nut comes off ok. As you can see by my picture the threads were completely stripped off the nut and it messed the threads up in the cylinder as well. We were able to fix the cylinder threads as it was all the aluminum that was galled inside the steel cylinder. Anyway, after using a 10 foot cheater pipe and a pipe wrench we got the gland nut removed. Two things: 1) There just is NOT enough material on the end of that gland nut to get the pipe wrench to grip it without messing up the cylinder itself - What a crappy design. Gland nut removal tools just don't cut it. 2) Gland nut is aluminum and the cylinder is steel ....... dis-similar metals are a bitch to work with in cases like this. Really another crappy design! I mean any Hyd Cylinder. It's not Bobcats fault here. Knowing I had to rebuild the tilt cylinder OR buy a new one I too chose to rebuild. BUT, I did not buy any kits until I got it all apart. And, I almost gave up on that. When I had the parts off, I headed to the bobcat dealer to get new ones. I thought I had the right part numbers but noooo I was wrong. Lucky I went there. They matched it all up and off I went. Probably less than an hour job if the gland nut comes off easily. Took me 3 days of fooling around to get this one done. Learned a lot though. Total cost about $20 for the kit and $130 for the gland nut VS about $1,100 for a new cylinder. http://s128.photobucket.com/user/HarryHarley/media/Bobcat%20763/BobcatTiltCylinderRepair3.jpg.html?sort=3&o=0

 

[turbomoparboy]

I have a 1999 763 so I don't know if this helps you. I just when through this. Here's my take. I destroyed my gland nut when trying to remove from cylinder. I was pissed. It looks like such a simple job, and it is IF the gland nut comes off ok. As you can see by my picture the threads were completely stripped off the nut and it messed the threads up in the cylinder as well. We were able to fix the cylinder threads as it was all the aluminum that was galled inside the steel cylinder. Anyway, after using a 10 foot cheater pipe and a pipe wrench we got the gland nut removed. Two things: 1) There just is NOT enough material on the end of that gland nut to get the pipe wrench to grip it without messing up the cylinder itself - What a crappy design. Gland nut removal tools just don't cut it. 2) Gland nut is aluminum and the cylinder is steel ....... dis-similar metals are a bitch to work with in cases like this. Really another crappy design! I mean any Hyd Cylinder. It's not Bobcats fault here. Knowing I had to rebuild the tilt cylinder OR buy a new one I too chose to rebuild. BUT, I did not buy any kits until I got it all apart. And, I almost gave up on that. When I had the parts off, I headed to the bobcat dealer to get new ones. I thought I had the right part numbers but noooo I was wrong. Lucky I went there. They matched it all up and off I went. Probably less than an hour job if the gland nut comes off easily. Took me 3 days of fooling around to get this one done. Learned a lot though. Total cost about $20 for the kit and $130 for the gland nut VS about $1,100 for a new cylinder. http://s128.photobucket.com/user/HarryHarley/media/Bobcat%20763/BobcatTiltCylinderRepair3.jpg.html?sort=3&o=0

Do you happen to remember the part numbers you used? I definitely want to rebuild mine since it is in good shape. I ordered the gland nut ( Head) PN 6539185. This is the one used in the early 90's machines with the 3.25" bore. None of the local dealers stock the heads. It appears they all went to the 3.5" bore in the later 90's

 

[HarryN]

Do you happen to remember the part numbers you used? I definitely want to rebuild mine since it is in good shape. I ordered the gland nut ( Head) PN 6539185. This is the one used in the early 90's machines with the 3.25" bore. None of the local dealers stock the heads. It appears they all went to the 3.5" bore in the later 90's

Sorry to say I can not find the paperwork for the Gland nut part #. That's why I took it to them. They happened to have them in stock as it seems it's the one item that gets messed up a lot when removing it.

 

[Tazza]

Do you happen to remember the part numbers you used? I definitely want to rebuild mine since it is in good shape. I ordered the gland nut ( Head) PN 6539185. This is the one used in the early 90's machines with the 3.25" bore. None of the local dealers stock the heads. It appears they all went to the 3.5" bore in the later 90's

Worst case, take it to a machine shop and ask for a quote to copy your old one.
I had the same problem, i'm lucky enough to have the gear to make one myself, and i did.
I'd take the sample to your dealer and say this is what i want. If they get the wrong one in, it's not your fault.

 

[turbomoparboy]

I recieved the tilt cylinder head part number 6539185. This is the correct head. I am not sure if there is a "knowledge base" or other way on the forum to keep this info where others can easily access it incase anyone else runs into the same problem where Bobcat calls for 6539934 as being the correct head but your machine has a 3.25 bore not the 3.5". Bobcat 6539185 head is the same as head 6539934 except it is for a 3.25" bore. There is another 3.25 head You also need the 3.25" seal kit. This is the same for all 3.25 bore bobcat cylinders. Anyway my cylinder is back together and working perfect. I am also happy since the parts were far cheaper than the $1000 price tag of a new cylinder.

 

[Tazza]

I recieved the tilt cylinder head part number 6539185. This is the correct head. I am not sure if there is a "knowledge base" or other way on the forum to keep this info where others can easily access it incase anyone else runs into the same problem where Bobcat calls for 6539934 as being the correct head but your machine has a 3.25 bore not the 3.5". Bobcat 6539185 head is the same as head 6539934 except it is for a 3.25" bore. There is another 3.25 head You also need the 3.25" seal kit. This is the same for all 3.25 bore bobcat cylinders. Anyway my cylinder is back together and working perfect. I am also happy since the parts were far cheaper than the $1000 price tag of a new cylinder.

Glad you finally got the rite one, shame it was so much effort though.
$1000 for a new cylinder is a bit over the top, but i guess they can try and charge what ever they wish.

 

[turbomoparboy]

Glad you finally got the rite one, shame it was so much effort though.
$1000 for a new cylinder is a bit over the top, but i guess they can try and charge what ever they wish.

The delears did not want to help. All I got out of them was "There is only one head listed for the 768 and someone changed the cylinder on your machine". It took me a few hours of research to find the part and in the end it came down to a guess between 2 numbers. I really like the part lookup on Bobcat's website. I thought the cylinder price was a little extreme too. I originially figured 1/2 that price max until I made the phone call. Delear quoted me $959.63 + shipping. An aftermarket cylinder was $770 shipped and my concern with the aftermarket cylinder is the quality and where would I get parts to repair it. Now that it is all together I can start my landscaping project that my wife keeps bugging me about. This winter I plan to pull the engine and replace the hydrostat input shaft seal which is leaking a little and a new muffler. With the price of a new muffler I might just put a glass pack or some other type of muffler on it.

 

[Tazza]

The delears did not want to help. All I got out of them was "There is only one head listed for the 768 and someone changed the cylinder on your machine". It took me a few hours of research to find the part and in the end it came down to a guess between 2 numbers. I really like the part lookup on Bobcat's website. I thought the cylinder price was a little extreme too. I originially figured 1/2 that price max until I made the phone call. Delear quoted me $959.63 + shipping. An aftermarket cylinder was $770 shipped and my concern with the aftermarket cylinder is the quality and where would I get parts to repair it. Now that it is all together I can start my landscaping project that my wife keeps bugging me about. This winter I plan to pull the engine and replace the hydrostat input shaft seal which is leaking a little and a new muffler. With the price of a new muffler I might just put a glass pack or some other type of muffler on it.

Some dealers really go that extra mile to help you out, others really can't be bothered. It seems you have one that can't be bothered to help their customers.
I can understand that they don't always get all the information, but all they need to do is call a dealer that has one in stock and ask them to put a ruler across it to give a size.
I thought the mufflers weren't that bad, have you checked ebay? i thought i saw them on there at a reasonable price.