731 Project Questions

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yooper

New member
Joined
Jan 24, 2015
Messages
2
Bought my first bobcat, 731 w/ Deutz 511. The biggest problem it has is the bucket drifts down. The problem is in the valve. Someone posted it would be easier to remove the engine and looking it over I agreed. Am I glad I decided to do that. Found the throttle linkage rods almost completely worn through. The oil cooler was completely blocked with crud, about and 1" thick! I have a couple of questions if anyone can help. The throttle arm on the engine moves all the way to idle/off but when I move it towards full throttle it will not move all the way towards the stop screw. It feels like it is contacting a spring because it moves a little once it hits whatever it it hitting. Have not checked this when the engine is running, this could be normal? The lever does move freely and easily springs back. The hydraulic pressure and temperature switches are missing. I cannot find the ratings for these in the manual. Anyone have any idea what these items should trip at? When first started cold it wants to creep forward a bit. Once it warms up it doesn't creep at all. Is this just thick oil or should I go through the linkage adjustments? The levers are both contacting where they need to.
 

antfarmer2

Well-known member
Joined
Oct 28, 2013
Messages
2,801
Might be the cylinders needing rebuilt.......... for the creep block it up good to ajust the creep out......for the senders just have them droped shiped from bobcat
 

OldMachinist

Well-known member
Joined
May 24, 2006
Messages
2,748
The throttle linkage needs to be checked with engine running because of the governor. Full throttle RPM is 2950-3000.
The charge pressure switch should turn on the light when pressure drops below 20-25 psi.
The hydraulic oil temp. switch should turn on the light at 225 degrees F.
 
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