Isuzu diesel in my 643 Bobcat Skid steer

[WMowat]

I bought a 86 643 Bobcat skidsteer. It is supposed to have a 28. 5 hp kubota 3 cyl diesel. Mine has a Isuzu. The only tag I can find is near the pump on the timing cover. The problem is its partially missing. All I can make out is UA3KC_ _ -E , I think its the model number but I can't find it anywhere on the net. The stroke is 76 mm and its somthing 80cc's. Its a 3 cyl, looks like Indirect injection. exhaust and intake on the same side.

I want to find the hp and how to bump it up. mabye I can add a turbo ? : ) I need a starting point to tweak from.

 

[bmoeller]

www.bobcat.com



http://www.bobcat.com/products/hist...eType=SSL&itemId=295&SUBMIT=Lookup+This+Model

 

[WMowat]

Bobcat never offered a Isuzu in any skid steers. The prevous owner put it in, I don't know the guy or how to get old of him. Thats why I was asking to see if anyone knew. Thanks for the reply though.

 

[WMowat]

Anyone, I can't stand not being able to tweak something, I sort of figured it out but I don't want to ruin it.

 

[bmoeller]

Did a quick Google search. Came across this place- http://www.blueridgediesel.com/dieselengines/isuzu1.htm



Maybe they can help.

 

[KBennett]

I had a neighbor that had four Bobcats. I could have sworn that he said they were Isuzu powered. They always ran great for him, an occasional starter or alternator, and routine maintenance.

 

[Hemiless]

google search

Just did a google search and found a lot of bobcats that were Isuzu powered so if bobcat didn't offer it then there are a lot of repowered bobcats out there. That should make finding the suppler of the repower kit easier.

 

[WMowat]

There were alot of Bobcats with Isuzu power, just not this model. The 8xx's etc were. Thanks again for the replys

 

[daveshoe]

Bobcat ran different engines depending on the weight class of the machine. The most popular weight class, the 700 series runs Kubota. The 853 runs Isusu as standard. The higher horsepower 873 runs an oil cooled Deutz. I believe the big 900 series used to run a 105 horsepower Perkins.

Keep in mind that turning up an engine will not change the characteristics of breakout force or speed. At a given engine RPM, the hydraulic pump puts out a given volume that relates to speed only. You will have the same torque available at any RPM unless you load it up so much that you stall it. Unless you are stalling your machine all the time,I would not mess with it. I rarely run mine at full throttle as I can get more work done with smoother running [slower responding] controls. FWIW I run a 60 HP class 853

 

[WMowat]

Yeah , I'm stalling it alot. Seem to want to work faster than the machine can. I need to always run it at full throttle. I own alot of equiptment so I guess going from a track excavator to the Bobcat is a little of a change.