Mack MRU - Removing Pressure before Working on the Tanks; Moving a Vehicle Using Auxiliary Fuel

30MAINTENANCEANDLUBRICATION
RemovingPressureBeforeWorkingontheTanks
Ifthefuellinesbetweenthetanksorthetanksthemselvesmustbeworkedon,the
systemmustbetotally"bled"offuel,includingthetanks.Withaminimumamount
offuelinthetanks,openthemanualventvalvesonthetanksuntilthetankpressure
gaugesreadzero.
Note:Ifpossible,trytoservicethetanksafterthevehiclehasusedmostofits
on-boardfuel.
WARNING
Neverbleedthetanksinanenclosed
area.Besuretherearenosourcesof
ignitioninthearea.
MovingaVehicleUsingAuxiliaryFuel
WhenLNGtanksarenotfueledorhavebeenremoved,thevehiclemaybemovedby
connectinganauxiliaryCNG(compressednaturalgas)tanktotheconnectionlocated
ontheleftsideframerailbehindthefrontinsideofthefueltankonthedriverside.
CAUTION
UseaCNGtankwithitsownpressure
regulator.Pressuremustnotexceed120
psigatauxiliarytankconnectionvalve
(seeillustration).