Well I have a serious leak. I cleaned out all the crud build up so I could find the leak. It appears to be theleft pump wich feed the left motor which is also a weak. I removed the stering linkage and all the lines. It appears that all is holding the pump is two bolts and the pully on the shaft of the pump. There is about 1 inch clearance from the pully to the steal body of the machine. How in the heck do you get the bolt off the pull and fit a puller on so you can pull the drive pulley off. It is tight. I hate to pull the engine to get these pump off. what a pain just for a few seals that need replacing..Thanks in advance.
How to remove pully from bobcat 753 hydrostatic pump
- Thread starter ShaneCl
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skidsteer.ca
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It can be done without the lifting arm.
Ken
nobull1
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I had to replace the pump seal in my 763 and there was no way without pulling the motor. We just slid the motor right out the back onto two planks that were braced up to the edge of the Bobcat. It just slid right out and down the planks. When we put it in we just used two guys in the back and one guy in front with a rope to pull it in. This was not the easy way to do it but three able guys made it work.
Brian
You do need to remove the pump and motor as one. You need the space to install a puller to get the pulley off. Even with a 10 tonne hydraulic puller, its a pain, no way can you get it free in the machine still. Its locked in place with a taper and a key, you can't simply slide it off.
Pulling the engine and pump as one isn't that hard, it also gives you a chance to clean behind the engine.
I have the engine and pump out of the machine. I am a rookine working on this machine, but I do have a little common sense. I am a machinest by trade. My question is should I spend the money and put a seal kit in myself wich should cost around a $100 or send it out to be rebuilt professinally by a company that can bench test the pump before I put it back in the machine. The quoted me a price of $425 which includes shipping.
Its totally your choice here. If it ran well with the leak, i'd just throw the seal at it.
Thats my opionion at least, changing the seal is pretty easy from memory. Its a snap ring to remove a large washer that covers the seal, possibly another one that holds the seal in place. You will need to drill or punch a hole in the case of the seal and screw a self tapping screw into it and lever it out. The only problem with this is to keep the swarf from getting into the pump. Pissibly holding it on an angle so if any gets in side it will sit on the back of the seal. My seal changes were done with pulling the pump down to replace other parts too.
Good luck!
