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Case 850K series3

Coy Lancaster

Coy Lancaster

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I am working on a Case 850K series3 with a track issue. The right track will not engage, left track works. The only fault code is 4533F on inst. cluster. I've checked all the connectors and wiring as per trouble shooting procedures. This one is throwing me for a loop. I did remove the joystick and installed it on another machine and it worked fine with no issues. The owner told me that when this problem started that he could hit dash and problem would go away for a bit so he replaced the dash with new one but still has problem. I did check the connector behind dash and the resistor which checked out good.
 
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fpgm04

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Dec 31, 2009
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Not sure what specific wiring checks are in the troubleshooting procedure that you have done, but I would suggest checking for wiring rubs causing some shorting in the front console harness as that is where I would initially suspect the issue lies.

When you say the dash was replaced, does that mean the instrument cluster was replaced or entire front console?
 
JD955SC

JD955SC

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If he could apply the ol’ pimp hand to the dash and cause it to go away seems to me the wiring might just be the issue. Did you take the dash apart and pull test and flex the wiring in that area? Check across pins for continuity to other pins that shouldn’t be there?
 
Coy Lancaster

Coy Lancaster

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Yes I did flex the wiring and am leaning toward that as the issue. Everything ohmed out correctly in the dash harness but it still could be an issue with loose sockets in connectors. Thanks for your input.
 
Coy Lancaster

Coy Lancaster

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service tech
fpgm04 said:
Not sure what specific wiring checks are in the troubleshooting procedure that you have done, but I would suggest checking for wiring rubs causing some shorting in the front console harness as that is where I would initially suspect the issue lies.

When you say the dash was replaced, does that mean the instrument cluster was replaced or entire front console?
Click to expand...
The inst. cluster was replaced and I've ohmed all the cluster harness wires.
 
Coy Lancaster

Coy Lancaster

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Update on dozer, replaced the dash harness and that took care of ON CAN issue. Did all test as far as testing voltage and hi-lo can test at diag test connector. Now there are no codes but right track is still dead, I'm leaning toward a pump or motor issue. I removed the solenoid from park brake valve and did pressure test on tracks. Left track has 7000psi, right track has "0" pressure. One question I do have though is voltage reading should I get at pump solenoid connectors when FnR lever is shifted?
 
M

mikebramel

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Jul 15, 2012
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milwaukee
Is the charge pressure the same on both units. If they are A4 type pumps you can remove the plug on each side and watch pilot pressure
 
Coy Lancaster

Coy Lancaster

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mikebramel said:
Is the charge pressure the same on both units. If they are A4 type pumps you can remove the plug on each side and watch pilot pressure
Click to expand...
Yes the charge pressure is the same. I swapped the electrical connections on the two pumps and motors. And the pressures remained the same on both pumps.
 
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mikebramel

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milwaukee
And if you command straight forward movement is the amperage draw on the proportional coils the same each side?
 
Vetech63

Vetech63

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A lot of the EDC ‘s on the pumps have a manual override lever. Have you checked it and stroked it to see if you have track movement?
 
Coy Lancaster

Coy Lancaster

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Vetech63 said:
A lot of the EDC ‘s on the pumps have a manual override lever. Have you checked it and stroked it to see if you have track movement?
Click to expand...
I didn't think of that but it should have changed pumps when I swapped connectors
 
Vetech63

Vetech63

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I would still stroke the manual lever. I have see strange issues with those EDC’s. At least you would know without a doubt if it was an electrical or mechanical problem. If I remember right, there is no voltage in neutral ans it only takes around 3 volts for full stroke.
 
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