im buying a bobcat 720 with a bad vh4d motor,i have a vg4d off of a old r40 ditch witch and i also have a ford industrial inline 4 out of an old tennant street sweeper i can use.what has me lost is can a person reverse the hydrostat pump to make the pump turn so i can use the water cooled ford motor?any ideas are welcome thanks lance
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I think it actually could be done.....
This would involve pulling the pumps apart though. The valve plates need to be swapped and the cam ring on the vane pump would need to be flipped over. The valve plates are my concern as they have cuts in them and MUST be installed so the rotation is in the correct direction. But i do think its possible...... This is me assuming the main hydraulic pump is s vane style, if its a gear pump its not so simple.
This would involve pulling the pumps apart though. The valve plates need to be swapped and the cam ring on the vane pump would need to be flipped over. The valve plates are my concern as they have cuts in them and MUST be installed so the rotation is in the correct direction. But i do think its possible...... This is me assuming the main hydraulic pump is s vane style, if its a gear pump its not so simple.
im wondering if it would be easyer to use the vg4d wisconsin motor due to only having to drop the vg motor 1in to make it line up to the hydrostat,and the vg has 37hp compared to 30 on the vh4d.the vg is 2in longer ,2in taller,3in wider.im not sure how it couples up to the hydrostat.the thing im looking at is its an older loader and how much is it worth .it has had all the drive motors replaced and new hyd pump on it .
The VG4D would be far easier, the extra HP would be handy but how far do you go?
Good luck with the swap/conversion, remember take pictures!
im not going to be using it everyday mainly side jobs on weekends ,im going to mount a ditch witch 140 backhoe on it as an attachment,build a tree scheer ,dozer blade out of an old 3pt blade with tilt and angle.my goal is to make reliable loader that i can do my own work and be able to fix the loader right
on a 620 -730 bobcat does the plate that the wisconsin motor bolts down on come out or is it welded in.
sterlclan
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Id go wisconsin....itll be easier than switching the pumps and then there is cooling,coupling...anything is possible should be a double u joint joining the current set up .....good luck.....Jeff
sterlclan
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the mount should bolt in
it looks like it does from the picts i took of it,but i wasnt sure with everything covered in grease.
finaly got a chance to go get the bobcat its m-700 not a 720 but thats not a problem.im headed home tommorow it looks like its going be easy now that i got it cleaned up im going to have to remove a steel line and replace it with a hose to make the swap work but it looks to be simple.will get picts also
Looking forward to seeing piccies!
got skidloader home motor out and going to have buy a new flywheel with a bolt on flange and build a adapter and thats all its going to take to couple up the motor
what i found was i could rebuild the vh motor for $550 and have a new motor it was going to be $200 at least for the flywheel for the vg motor and i still would have a used motor that might not live.I am going to keep the vg motor for a spare in case i need it later. thanks
(if any one wants picts of what a bobcat 700 looks like without the motor in it email and i can send picts to an email address,cant get them to download to the forum.)thanks lance
flyerdan
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I've got a 700 as well and would be interesting in seeing what's behind the engine also. flyerdan at comcast.net Thanks.I never say no to "bobcat porn"
(taz38sup at yahoo.com.au) at = @ of course
