1997 bobcat final drive locked

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123ratdog

Member
Joined
Jan 16, 2013
Messages
8
sorry ULY and MICHAEL again just brought a bobcat 331 not only does the dipper arm not work but the final drive is playing up it locked up moving ever so slight forward then lock and then move reverse move ever so slight then lock took track off and unbolted it then thought move it again it locked moving forward the went to reverse and it come free now it works both ways again think some thing not right lol with thanks ULY and MICHAEL
 

melli

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Mar 25, 2012
Messages
149
I'd look at your manual...can get one cheap online for $10 from tradebits etc.... My machine is a newer 331 (2003) so circuits may have changed: Pump1 - Right hand travel, Boom, Boom swing............................. Pump2 - Left Hand Travel, Bucket, Arm, Aux.............. Pump3 - Blade, Boost, Swing.....................................So, are both drive sides locking up? Since you started getting problems since repair, I'm thinking you got something in system. If other systems work well, then I'd strike out the pump as the problem. Maybe air in system is causing problems...I was told by a bobcat mech that the drive spools can stick if air gets in there, but quite honestly, I haven't a clue...still learning myself.
 

Fishfiles

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Feb 8, 2007
Messages
1,698
I would drain the oil fron the planetary of the travel motor that locked up into a clean container and look for specks or chunks of metal , it could be two different problems you are fighting
 
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123ratdog

Member
Joined
Jan 16, 2013
Messages
8
I would drain the oil fron the planetary of the travel motor that locked up into a clean container and look for specks or chunks of metal , it could be two different problems you are fighting
Thanks Fishfiles Found out what the problem was with the final drive it was dry for one and the small dowl that fits into the cover plate was jamed between the planetary gears that is why it move slightly forward and slightly back pulled it out and locktight it into place and put it back together and it works :) but how did it get there with thanks Michael and Uly
 

Fishfiles

Well-known member
Joined
Feb 8, 2007
Messages
1,698
Thanks Fishfiles Found out what the problem was with the final drive it was dry for one and the small dowl that fits into the cover plate was jamed between the planetary gears that is why it move slightly forward and slightly back pulled it out and locktight it into place and put it back together and it works :) but how did it get there with thanks Michael and Uly
you lucky it didn't crack any teeth on the outter housing ...if it was dry there must be a leak so wacth it , if it is leaking from the seal of the travel motor I can tell you how to prolong it's life and delay rebuilding or replacing the travel motor , you could any thick gear oil you want to but I like Lucas hub oil , put about 4 oz of it in the planetary then fill the rest with good quailty moly grease , jack the machine off the ground and spin that track for about 5 minutes then pump it full of grease again and let it roll , I use one of those needle attachments for the grease gun to get it in there , I know of machines out there over 10 years running the grease /oil mix because of a bad seal
 
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