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I have a 643 bobcat and the hydraulic pump seal is blowing

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I have a bobcat 642 that will not turn left or right. Just bought it at a clearing sale. Do you have a manual for this model please


go to this site and download the underlined manual.:http://www.worldcat.org/title/bobcat-641-642-643-service-manual/oclc/221517962

Dec 06, 2016 | Bobcat Garden

1 Answer

My 863 bobcat brush mower loses power in heavy grass. I rebuilt the pump on brush cutter. I hooked up auger and the guger turns slow like hydraulic flow is low. what should I ck.


I would flow test the pump to be sure that there are no seals that are bad or also if any of the valves in the pump are bad. If any of the valves are bad you can test the spring pressure of that valve to make sure it is within the correct specifications in accordance with the technical manual for your specific pump.

Nov 08, 2016 | Bobcat Garden

1 Answer

I added diesel to the hydraulic tank in my bobcat and never an it. I drained the tank, refilled it, and now the hydraulic system wont work.


You should use hydraulic oil, not diesel, drain it, refill it and if necessary bleed all the air from the system (some are self bleeding) Dependant on the type of hydraulic system you may have damaged the seals by using diesel oil, that, unfortunately is expensive.

Mar 05, 2015 | Bobcat 773

1 Answer

Bobcat 641 skidsteer hydraulic problems.


That's one of the first things that came to mind as I was reading through your post; that the system was air-bound. Are there bleeder valves on the system?

In any event here is a website where you can buy the service manual for your skidsteer; https://mypowermanual.com/shop/bobcat/bobcat-641-642-643-skid-steer-loader-service-manual-download-6566135-10-86/

Feb 20, 2015 | Bobcat Garden

1 Answer

Why will bobcat run when I prime for about 15 seconds and die but if I hang fuel supply to injectors it will keep running


Sounds as if the transfer pump between the tank and injection pump is the issue. A restricted line from the tank would stop the strongest pumps from doing the job. Fuel filters are suspect too.

Feb 02, 2015 | Clarke Bobcat 643

1 Answer

How do I remove the slide arm on my 643 bobcat


Bobcat 641 642 643 Skid Steer Loader Workshop Service Repair Manua dowload

This is the most practical Service Repair Manual for the Bobcat 641 642 643 Skid Steer Loader Workshop Service Repair Manual Download ever compiled by mankind. This DOWNLOAD contains of high quality diagrams and instructions on how to service and repair your Bobcat 641 642 643 ,you can download it.This is a must for the Do-It-Yourselfer!

Jul 30, 2013 | Computers & Internet

2 Answers

Bobcat 643 how to disassemble fuel injector


this is a job best left to the diesel experts. While you may be able to get it off the engine the settings are critical for engine life. If you get them wrong you will burn holes in the pistons or over rev the engine causing destruction. Diesel pump calibration is done on a bench and each plunger is set to produce the right amount of fuel and the governor is set to cut the fuel at a predetermined rpm setting ( flight idle)

Jun 04, 2013 | Clarke Bobcat 643

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