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Weak final drive on cat 311B excavator
- Thread starter slwbid
- Start date
funwithfuel
Senior Member
I beat that horse to death, I firmly believe the OP should be contacting a dealer tech or competent mechanic. Too many unknown variables. Too many assumptions.Here is my chime in. Don't be adjusting screws on anything until the leakage problem is discovered. JMHO of course!
slwbid
Well-Known Member
Ha. .
Its got lots of very helpful info for yours truly. Do I need to end this one and start another?
.Its got lots of very helpful info for yours truly. Do I need to end this one and start another?
NOOOOOO.....,.stay here! We HAVE to get this to 61 pages.Ha.
Its got lots of very helpful info for yours truly. Do I need to end this one and start another?
rmllarue91
Senior Member
Measure case drain by comparison between left and right put case drain hose in bucket operate with tracks pinned in stall condition set amount of time.
Last edited:
funwithfuel
Senior Member
Pinned tracks may give poor results, ie if you have one or two blown piston bores, they may not necessarily show themselves. I always recommend running case drain, it shouldn't be a substantial volume to begin with.
slwbid
Well-Known Member
Can anyone remember what page the instructions are on for locating case drains?
rmllarue91
Senior Member
Medium sized hose from middle of drive motor hose should be lower pressure. The squishy hose lol
slwbid
Well-Known Member
Ok. I try check that soon
brokenpto
New Member
Slwbid, you ever get that weak motor figured out?
This thread has been a great read, great example of systematic troubleshooting.
This thread has been a great read, great example of systematic troubleshooting.
Nige
Senior Member
It would have been over in a heartbeat if the OP had actually done what was suggested in the way of troubleshooting in the order it was suggested he did it, instead of veering off at a tangent every 5 minutes.....
In fairness he didn’t have the tools to start, thereafter it all went south but ‘‘twas a good read nonetheless with a lot of valuable info as I’m about to start troubleshooting the same issue on my machine
slwbid
Well-Known Member
slwbid
Well-Known Member
Unfortunately I did not. I was needing to downsize and so traded it
I got it down to the point of being ready to look for case drains or a kinked hose around the motor
As u read, all the pressures were normal.
I even found myself thinking there might be pilot valves or actuators in play where one was not allowing sufficient flow through.
I really wanted to gind out and end this story on a “mission accomplished” note
Unfortunately i still work another job full time and the machine was perfectly usable for me. i could probably gotten more money out of it, had i found and fixed the problem, but didnt have the tools and Ran out of time
i do thank everyone who contributed to trying to find the issue. This is a great forum!
I got it down to the point of being ready to look for case drains or a kinked hose around the motor
As u read, all the pressures were normal.
I even found myself thinking there might be pilot valves or actuators in play where one was not allowing sufficient flow through.
I really wanted to gind out and end this story on a “mission accomplished” note
Unfortunately i still work another job full time and the machine was perfectly usable for me. i could probably gotten more money out of it, had i found and fixed the problem, but didnt have the tools and Ran out of time
i do thank everyone who contributed to trying to find the issue. This is a great forum!