mcratchet1

ok thanks i'll look them up

so i have a 2006 mr688s (032711) the jack operates great lifting the cab but when i want to go down it will pump up and get solid and not move. The only way to lower cab is to open the line, there's no leaks or damage visible. My question is there a relief valve inside maybe hanging up? Has anybody had this problem before? Thanks!!

is there a proper technique for setting the clutch brake

Hey guys just wondering if the newer mack mru 2015+ with t310 and t318 transmissions, if the clutch still gets adjusted the same way as the older mr688s models? By old way i mean put a wrench on clutch adjusting bolt with prybar have someone step on clutch and push in spring to turn the bolt Thanks

what do you mean by common failure? compressor hose plumbed into exhaust manifold?

yes from dash, ill take a look at check valves should i put a gauge on the wet tank itself to see if its losing air somehow? could it backfeed thru a valve?

etec e7

no it was doing it before injectors were installed oil sample says soot%0.4

so getting back to this, i have checked ever where for a leak cant find one truck holds air pressure over night also

i have a 2003 mr688s 400hp blowing black smoke in bewteen gears truck runs great no problems. New turbo and injectors beginning of this year, should i be concerned or just let her roll?

i found it a pinched key switch wire

yes already bypass it

2006 mr688s (032711) under dog box all 4 power relays buzzing when i try to start all fuses good, batteries are good, just changed starter since i had one no difference i check and cleaned grounds no change even new key switch any help would be great thanks!

on all 4 power rely's #30 has power and #87 is ground

whats a typical cause ? rubbed wire?