743 control valve rebuild

[therick]

May I also get that manual. Thanks In advance. [email protected]

 

[brdgbldr]

Ok it looks like (after I pressure washed it off) the front cover comes off with out removing the hydro static unit. It seems to slide under a few inches. Am I correct?
Is there supposed to be 4 bolts holding the motor side access covers on from the bottom? If so mine are rusted heads almost gone.

Yes, there are supposed to be 4 bolts holding on the motor access covers on the bottom. Be careful not to destroy your covers as they are hard to find. I had to weld up my own covers for my 742B.

I replaced the axle bearings and seals in my 742 and, while I replaced all 4 bearings/ seals, I found it much easier to remove the chain case by unbolting the pump, bracing it, removing the motors hoses, unbolting the frame and then jacking up the frame and removing the chain case. This way you have access to the entire case.

Also, Bobcat has special washers/shims of different thicknesses to take up any play in the axel. The torque on the axle bolts is 600 ft-lbs. I actually had to buy a torque wrench since I was able to start stretching a bolt and caught it before it broke.

 

[jp8775]

Yes, there are supposed to be 4 bolts holding on the motor access covers on the bottom. Be careful not to destroy your covers as they are hard to find. I had to weld up my own covers for my 742B.

I replaced the axle bearings and seals in my 742 and, while I replaced all 4 bearings/ seals, I found it much easier to remove the chain case by unbolting the pump, bracing it, removing the motors hoses, unbolting the frame and then jacking up the frame and removing the chain case. This way you have access to the entire case.

Also, Bobcat has special washers/shims of different thicknesses to take up any play in the axel. The torque on the axle bolts is 600 ft-lbs. I actually had to buy a torque wrench since I was able to start stretching a bolt and caught it before it broke.

 

[jp8775]

Wow thanks, sounds like you have done a few. Do you think a 643 frame would work on a 743? Seems everything measures up in the engine compartment. I have a 643 frame and motor case, as long as I have the chain case off the my 732 and the engine out (needs a head gasket) and the 643 case is like new the 743 case is rusty? Also what is a good source for used bobcat parts? I started another thread called interchangeable parts 743.

 

[brdgbldr]

Wow thanks, sounds like you have done a few. Do you think a 643 frame would work on a 743? Seems everything measures up in the engine compartment. I have a 643 frame and motor case, as long as I have the chain case off the my 732 and the engine out (needs a head gasket) and the 643 case is like new the 743 case is rusty? Also what is a good source for used bobcat parts? I started another thread called interchangeable parts 743.

I replied to your other post interchangeable parts.

As for used parts your best bet is to find the part number and do an internet search. I have been lucky a few time with this site:

All States Ag Parts | Used & New Tractor, Combine & Skid Steer Parts

All States Ag Parts is the leading supplier of tractor, combine, and skid steer parts to North America. We sell new aftermarket, remanufactured, and used parts.

www.tractorpartsasap.com

 

[Guy]

Hope the manual helps you guys.
I can't even remember where I found it years ago but I figured I would download it in case I needed it in the future.
I just sold my 742B ( probably a big mistake ) so I don't need it anymore but will hang onto it. I suggest that you do the same and pass it on when others need it.

Do you still have the 743B control valve manual. I am in need of more knowledge on this. Thank you for any help. Guy. [email protected]

 

[Guy]

I may have the manual you need. It's too big to post in the manuals section.
Message me your email and I can try to send it to you.

I have a 743B with a leaking control valve. Do you have the repair manual? Thanks for any help

 

[gary743]

I have a 743B with a leaking control valve. Do you have the repair manual? Thanks for any help

What control valve does your machine have.

 

[Rich01]

I may have the manual you need. It's too big to post in the manuals section.
Message me your email and I can try to send it to you.

Hi seen your post about having a manual for the 743. If possible are you able to send me a copy of it? My email is [email protected]. Thank you.

 

[brdgbldr]

Hi seen your post about having a manual for the 743. If possible are you able to send me a copy of it? My email is [email protected]. Thank you.

I sent the same Control Valve manual that I've been asked for in this thread.

I also have a 742B, 743B Service Manual but I have not tried sending that to anybody yet.

 

[jjlow]

I would also like a manual I'm rebuilding my spool valve on my 743 my email is [email protected]
Any manuals will help and greatly appreciated thanks

 

[bigc4791]

Could I get a copy of the 743 valve manual also? [email protected]

 

[dfb]

I would be interested in the control valve manual also for a 742B if possible.
I had somebody resealed mine a few years back and it operates with no leaks, the only thing I wish was better is how stiff the pedals feel. The linkage is free moving but there is no "finesse" in the pedal control, the valve{s} seems to pop loose instead of gradually opening. Once open, it is easy to feather closed but the initial opening is difficult to control in small inputs.

 

[brdgbldr]

Could I get a copy of the 743 valve manual also? [email protected]

Sent

 

[Dave1234]

I have a 743B with a leaking control valve. Do you have the repair manual? Thanks for any help

Hi Brdgbldr! could you also send me the valve manual? I have a 742B also. Thank you. david.webb#cot.net Please replace the # with @
Thank you for all the good advice.

 

[brdgbldr]

Hi Brdgbldr! could you also send me the valve manual? I have a 742B also. Thank you. david.webb#cot.net Please replace the # with @
Thank you for all the good advice

Got a mailer-daemon and I did change the #.

Will try to send through this sight.

 

[Tango-Charlie]

Hey brbgbldr, Could you send me a copy of the control valve manual too? Being I have a 742B I'd also be interested in the service manual you have if that can be sent or you would like to try to send it. The email in my profile is a good email to send it to.

Thanks in advance,

TC

 

[brdgbldr]

Hey brbgbldr, Could you send me a copy of the control valve manual too? Being I have a 742B I'd also be interested in the service manual you have if that can be sent or you would like to try to send it. The email in my profile is a good email to send it to.

Thanks in advance,

TC

I sent you five items through the "Start Conversation" email.

Tell me if you got them or not. Most of these manuals are too big to post on these forum threads but the "Start Conversation" seems to work well. I've only just figured this out so I need feedback to make sure it works.

 

[Tango-Charlie]

I sent you five items through the "Start Conversation" email.

Tell me if you got them or not. Most of these manuals are too big to post on these forum threads but the "Start Conversation" seems to work well. I've only just figured this out so I need feedback to make sure it works.

Worked great for me as I received all. Thanks again!

 

[jp8775]

Could you send me a copy also [email protected] I do not have one for the 743B. I have one appart right now.