The Craftmans Shop > New from Old
JCB 803 Saga
tom osselton:
I'm following along too. .... Thinking CANDY APPLE RED!
DMIOM:
--- Quote from: PeterE on August 27, 2015, 04:43:03 PM ---.....
I am impressed by your skills, fearlessness and ingenuity to take on that wide variety of projects :clap: I always learn a thing or two for each thread I read.
--- End quote ---
+1 :beer:
Dave
awemawson:
--- Quote from: AdeV on August 26, 2015, 06:44:19 PM ---IPA (not the beer) is Iso-Propyl Alcohol. Never heard it called Industrial Pure before - did you get the Chinese stuff? :lol:
If you get bored of the linear bar graph, Sparkfun do some rather cool radial ones: https://www.sparkfun.com/products/11492
I bought a stack of LED products a while back, pretty sure I got some of the radial ones, you're welcome to one if you like.
--- End quote ---
Hi Ade,
Now if I'd known they existed I might well have used them if they fitted into the space, but it's not worth revisiting this as life is too short and the present set up is working.
They look fun to use though :thumbup:
awemawson:
As for once this morning it wasn't raining I decided to try and tackle the issue I have with the left hand track motor only going at low speed and not high speed.
Each track motor (left and right) has a two spool block attached, one spool of which is a balancing spool and I don't think that it's involved in speed changing, and the other spool controls track motor speed. The left and right hand versions of these spools are driven by a common oil line (ie they both work in parallel) and the spool is pressed into the low speed position by a spring, and into the high speed position by the oil (sourced by a solenoid valve controlled by a manual switch).
Now as the right hand motor speed changes the solenoid valve must be supplying oil pressure ( :scratch: )
This is the general arrangement, circuit diagram and description from the book of words:
awemawson:
Now I was working on the assumption that as obviously the right hand spool is changing speed, oil pressure is being supplied to the left hand spool and maybe it is stuck. So time to dismantle it.
By slewing the cab at 90 degrees the access is quite good, the spool block being behind a cover plate on the inner face of the under carriage. Taking off the plate, I gave things as good a clean as was possible in situ, identified the hoses with tywraps and started dismantling.
It was at this point I discovered that one of the four M8 caphead bolts retaining the spool valve onto the track motor was sheared off :bugeye:
I decided to centre the sheared stub of bolt by running an 8 mm drill down the hole before removing the spool block, so that it acted as a guide. That way I could more easily drill it out
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