Case 580 CK Roosa Master/Inj. Pump - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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Old 03-14-2011, 10:47 AM   post #1 of 7
johnrob
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Default Case 580 CK Roosa Master/Inj. Pump

Hello everyone,

My 580 is giving me fits. Starts fine, idles fine. But when you push on the throttle the the RPM slowly rises and slowly falls. I removed the linkage from the governor and operated the lever by hand with same results. The lever moves back and forth freely like there is no return spring.

Is there an internal spring that may have collapsed?

Any ideas?

I want to explore options before getting a reman.

Thanks
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Old 03-14-2011, 12:04 PM   post #2 of 7
TraderMark
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Default Re: Case 580 CK Roosa Master/Inj. Pump

JohnRob,

Sounds like the plastic coupling inside the pump has disentegrated and the debris is clogging the return line. It's not a uncommon problem for older RoosaMaster/Stanadyne pumps.

To check for this, remove the return line from the pump. This will be the line that goes from the top cover of the pump, up to a tee fitting on the number one injector. Now remove the fitting from the pump that this line was hooked to. There should be a glass ball and a spring inside this fitting. It's a one way check valve. Check inside the fitting for black plastic/rubber debris. If there's any debris there, you should remove the pump and have it repaired.

The new coupling will be made of metal and you shouldn't ever have the problem again.


Mark
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Old 03-14-2011, 12:45 PM   post #3 of 7
Ingersoll444
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Default Re: Case 580 CK Roosa Master/Inj. Pump

http://www.mytractorforum.com/showth...ighlight=580ck


Great thred that might help
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Old 03-14-2011, 01:33 PM   post #4 of 7
johnrob
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Default Re: Case 580 CK Roosa Master/Inj. Pump

I will pull the check valve fitting and see what is there. I have a feeling this pump has never been apart.

Great info on the thread Paul B

Thanks guys

Paul
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Old 03-14-2011, 02:44 PM   post #5 of 7
Ingersoll444
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Default Re: Case 580 CK Roosa Master/Inj. Pump

I have the same tractor and LOVE it!!!!! Awesome machine!!!!
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Old 03-15-2011, 03:09 PM   post #6 of 7
jdemaris
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Default Re: Case 580 CK Roosa Master/Inj. Pump

Quote:
Originally Posted by johnrob View Post
I will pull the check valve fitting and see what is there. I have a feeling this pump has never been apart.

Great info on the thread Paul B

Thanks guys

Paul

Just keep in mind that the plastic damper will NOT be eliminated by most pump shops if you send it in for repair. Most shops use the same short-lived plastic in the repair for off-road equipment with DB pumps. It was only completely eliminated when fixing pumps for cars and trucks driven on the road, that are using DB2 pumps.

If you want the upgraded part, you have to specifically ask for it and pay around $50 exta.

Complete seal kit with new plastic ring is $15. Upgraded non-plastic drive is $50. New housing-pressure-regulator-valve (being called a check-valve here) is $5.
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Old 03-16-2011, 11:56 AM   post #7 of 7
johnrob
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Default Re: Case 580 CK Roosa Master/Inj. Pump

I removed the fitting that should have the check valve inside, but there was no ball and spring. I was able to put a punch in the top of the unit maybe 2", did not see any debris either. This is a early 70's CK. Did some years not have a check valve?

I plan to remove the pump and go through it. I tried last night to get the timing mark lined up on the pump but the motor keeps lobing over to far. I cant get at the dampner to turn it by hand. What is the easy way to turn the engine by hand?

Where can I get a PDF of the roosa master rebuild instructions

Thanks
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