saved a old Clark from a trip to the scrapyard, valve handles were severely worn(10mm pins had been replaced with 3/8 bolts, ate the levers out) reslotted levers, oversized pivots, made new pins/rollers to fit new lever slots....
Anyways, levers are now good, no slop, smooth...but the 'down' on some of these Clarks dont throttle real well...was wondering if anyone out there had done any mods like notching spool, maybe changing to heavier pilot operated check spring to try and smooth operation?
it does throttle, but lever from slow to fast is only maybe 1/8" in 'down', more like 1/2" up/tilting... I like the smoother feel of our Mitsubishi lift/drop throttling, would love for the Clark to have same kinda feel to it...
years ago I worked on a lot of big old broaching machines, several times modded spools with a little chamfer or groove to soften transitions, imagine similar should be possible here, havent looked into spools/lands yet, figured couldnt hurt to ask in here first :)