John Deere 2140
- Thread starter bgmillar
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Tx Jim
New Member
Simplest/easiest way to check stand-by pressure is install male coupling on gauge and install in rear breakaway coupler of SCV.
Hi Jim,
Got a gauge and shows pressure around 2500. Also I managed to drive out SCV seat but was a mission as on startup there was no pressure at all! On removal of seat realised it was several mm longer than original and had different angle as well. Decided to reinstall original seat and got pressure back again!
Used tractor today to thump in some more posts and had same old problem where rockshaft would not lift post driver 90% of times and to get it to raise - lifted loader and then it would raise but sometimes I would need to actuate loader 10 - 15 times to achieve. The other symptom is that driver will only lift about half way most times but occaisionally will lift to full height. This certainly is a puzzle to me being intermittent like this.
Barrie
vtsnowedin
Elite Member
Years ago I had a David Brown that acted similar. There were two spool valves in the rear end housing to the right of the drivers seat. You could access them by removing a cover and unscrewing the top caps off each being careful to not let the cover or spring under it pop up and then down into the rear end housing (yah that's how I know that one).:ashamed: Once the cover was off and the spring recovered you could slip the spool up out of its seat and flush off the bit if grit that had got stuck between the spool and the close tolerance hole it fits into. This bit of grit or metal was what was catching the spool in the part open position and causing the problem. Something 1/10,000 inch was all it took and could be a bit of dirt that washed down the shift lever past a worn boot and into the rear end that served as the hydraulic reservoir. Maybe something along that line is your trouble?
Tx Jim
New Member
bgmillar
By chance have you checked the post driver control valve similar to the way you checked the loader control to ascertain if the valve is open or closed center. PS:2500 stand-by is too high. I'd lower it a little.
By chance have you checked the post driver control valve similar to the way you checked the loader control to ascertain if the valve is open or closed center. PS:2500 stand-by is too high. I'd lower it a little.
No I haven't checked the PD control and will do that in next couple of days and also lower pressure a tad too!
I do recall disconnecting the quick disconnect couplings to the PD initially when the problem first surfaced but it didnt make any difference at all, but will check it out as suggested.
Hi Jim,
Checked the post driver today as you suggested but no flow at all from the return hose.
I think next step would be to lift rockshaft housing off and give everything there a going over.
I have an unrelated question - I would like to replace the diff lock operating lever (which was broken in half just above foot pedal attachment point when I purchased tractor) but it looks like it wont come off its shaft without access into the internal workings of the back end. Is it possible that lifting off rockshaft cover will enable access to replace the lever?
Checked the post driver today as you suggested but no flow at all from the return hose.
I think next step would be to lift rockshaft housing off and give everything there a going over.
I have an unrelated question - I would like to replace the diff lock operating lever (which was broken in half just above foot pedal attachment point when I purchased tractor) but it looks like it wont come off its shaft without access into the internal workings of the back end. Is it possible that lifting off rockshaft cover will enable access to replace the lever?
Tx Jim
New Member
From parts catalog photo that appears to not be that difficult especially after removal of rockshaft housing. Since everything's been changed I don't have a slightest clue how to download a photo.
