mcratchet1

Ok thanks 

Yes can follower was in good shape thanks

Sorry it’s a 2007 mr688s aset 400hp

I had a engine miss every once in awhile and got a blink code 8-2 so I changed #2 pump but that did not help same code and a miss that comes and go. Those 2 wires on pump does it matter which lead they go on pump? Thanks

$128.00

Ok changed unloader valves no change at all. Still popping off every 10 seconds. The air compressor was replaced about 3 years ago. I guess it’s time to change again? Does anyone have any other idea what might be causing this type of problem?

thanks!!

My Mack parts guy was able to find an aftermarket just passing info along if anyone needs one too

Ok thanks I’ll check price on it

Ok replaced governor, purge valve, air dryer cartridge, and all 3 lines coming over governor. I cannot find any air leaks but no change purge valve pops off every 10 seconds what else am I missing ?

Ok I replaced air filter cartridge and purge valve will check air lines thanks!!

Hey I have a 2007 mr688s I know there has to be an aftermarket source on this strange hose instead of paying $240 to dealer any help would be greatly appreciate 

Great question and I’m not sure on so I’m going to replace it now thanks!!

Also I drain them every night I’m in Florida so still hot here. 

I have a 2007 Mack mr688s that’s getting quite a bit of water in air tanks every day also purge valve is popping off about every 15 seconds I’m checking for air leaks now! Is this signs of air compressor failing?

thanks!!

ok i will look into that as well thanks, i did not mentioned but the purve valve is popping off about every 5 mins

yes just water, it has ad9 dryer just changed filter 

2006 mr688s just replaced d2 because not building air on idle  at startup its constantly leaking air out of ehaust port. So i have to idle up to build air but once air is built up it stops also getting alot of water in tanks at the end of the day. Is this signs of air compressor failing i replaced it 2 years ago with bendix reman Any insight i would be grateful!!

thru the screen on dash

I have 2011 chu613 with mp8 (007780) aftertreatment nox sensor not reading, replaced now says out of calibration. Will these sensors calibrate there self after driving or do i have to take to dealer? Thanks!!

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

On 11/7/2019 at 3:48 PM, fjh said:

check the charge air system if there is nothing odious ,  check the compressor hose inlet    it is likely plumbed into the manifold! common failure!

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?