Are the gauge pointers wagging? They are can bus driven
battery cables, bad ground seem the most plausible
relay valve back feeding air
Does it have a plug in tha back to plug light cord for a converter dolly? if so see if that one has power.
Fuse or marker light relay
a seven way light plug tester would be a great thing to have to deal with this. Plug in to tractor seven way plug, see if all is good, plug into...
UPS grows on you, hang in there, the UPS love thing will pass
Experiencing UPS love? It comes and goes, been doing the big Brown thing for the last 20 years. Benefits are a good thing, a pay check that never...
'Make sure the disc inside the shutoff solenoid is installed correctly if it's flipped over it will run on for a bit like you experience
Radiator has to come out to take the head off, head bolts hide under the camshafts.
def injectors clogging partially depends on how clean the engine runs/ how much def gets sprayed continously. Software to activate the pump and...
Sitting still and after a brake application disconnect the blue glandhand from the trailer if air comes out and the brakes are now released it's...
Yup you need cam wedges timing pin, big torque wrench 3/4" impact with a lot of torque for the head bolts just to pull the head off. 7 mm feeler...
After brakes have been applied and released take the glandhand of the blue line. Was there residual air pressure when you removed the gland hand?...
DEF injectors clogging would be number 1, on Macks we have seen DEF pump failures around the 450- 550.000 mark. Nox sensors are a common...
How fast it builds air from 85 to 110 psi gives you an idea of how much air volume gets from the compressor to the air dryer. To me it seems to...
You so sound like a UPS er. Our benefits got down graded a bit but are still way better than most
Just maybe one or more dogs of the intermediate clutch plate broken off? Will make it shake and vibrate bad
How fast does it build air pressure from 85 psi to 110 psi? Could be that it does not supply enough air due to a restricted air discharge line...
Excellent advice
