Hi Daryl, we got the tracks on my buddy's D4 Traxcavator last night and drove it around. We adjusted the left clutch and now it releases very nicely that side. The right side was already working but only just so needs adjusting too. While operating the right clutch lever, we saw this other arm that goes back further from the bell crank and studying the parts catalog (some help) and the serviceman's reference (much more helpful picture), this appears to be a clutch lever booster spring, presumably to reduce the operator effort? It makes a clunking feel/sound when pulling the lever back. What would this be a symptom of? And will it go away when we get the clutch adjusted to spec?