slingblade

It looks like an Accumulator. It pre lubes or pre and post lubes the engine before start up and the turbo after engine shut down. Can't really tell from pic though if it has and electric solenoid on it. It appears it does on the lower right in photo. That's wired to the run side of the key switch.

One start up the solenoid opens and a couple of quarts of oil pre lube the engine. When the engine starts and runs the Accumulator is refilled. On shut off the solenoid closed with the accumulaor filled and under a few PSI. I run an similar set up on my Marmon and race car. Paul

im thinking your right,someone else also thought it was,thanks,

in the roadranger repair manual it recommends 50wt for extreme cold climates,85/140 is a bit too thick here for the winter,they did mention that the EP additives cause seal issues if the oil gets over 250 degrees,not an issue with mine,im already experiencing issues with the hi/lo syncro and slight delay going into hi,i listen for the clunk before going back on the throttle and i does good,sometimes i press the clutch to make sure that theres no preload on the gears when going into hi range which also helps,

on alot of other transmissions with many hard miles ive seen the stack shims wear causing excessive clearance between the gears which will cause it to jump out of gear also,,most transmissions call for 005 to 011 clearance at the end of the gear stacks on the shaft,

going through the same issues with my superliner,mix and match,,

im also installing A/c on my superliner using a compressor bracket from an RD that i modified to work on the left side of a NTC Cummins for the York compressor,a condensor from a 379 Pete shortened 6 inches to clear the crossbar on the hood,some butcher removed everything except the inside unit under the dash and cut the hoses,

on my 85 rws 713 left side of the motor is this device,its got oil and airlines going into it,the truck is originally from the northwest,Oregon,Washington area,it had Canadian DOT #s,everyone who knows cummins that i show it to has never seen this before,does anyone know what its for?[attachment=

on my 85 rws 713 left side of the motor is this device,its got oil and airlines going into it,the truck is originally from the northwest,Oregon,Washington area,it had Canadian DOT #s,everyone who knows cummins that i show it to has never seen this before,does anyone know what its for?

going to change out the gear oils soon and wanted to hear some feedback,ive got the 13 speed road ranger and live in Ga and was going to use 89w / 90 EP

theres an RD wiring diagram on this site,ive used it to fix my truck,look under the cab,drivers side near the foot valve,should be another brake switch there,

ive got a similar motor in my 85

superliner,mines a NTC 475 twin turbo,

you wont like air ride,,camel is the way to go here,you can attempt to replace the bad spring but its just better to replace all,web search parts from junkyards for saving money,,

happy birthday

i love it,it looks like its all business,not some whimpy truck,,nope

really nice,tuff old mack,actually more productive than the new ones when you take into account time spent listening to service writers

attempting to blow smoke at the customer about regen issues they cant fix,

Name: Mack superliner RWS 713 LS (1985)

Date Added: 05 April 2015 - 11:00 PM

Owner: slingblade

Short Description: late 84 superliner built for hauling/pulling pup in the NW and canada,NTC big cam twin turbo 475 cummins,with a roadranger 13spd,mack rears in 417 ratio,hendricks suspension,colombia dump with super hard cold roll floor,

View Vehicle

really nice old cabover,i drove my dumptruck from sedro willie Washington to outside of Atlanta in mid may,and it was still tricky with the weather esp. in montana,good luck with it,,

thats how my 85 superliner with the 13 spd road ranger is set up,mine is a 3 stage jake,i leave it on low to shift,when its on high and i need to shift i lightly touch the clutch pedal to keep it open circuited,the E motors are set up different and you can leave them on and it wont activate when your off the pedals,

just bought an 85 RWS 762 with the mythic 475 twin turbo NTC cummins,13 speed

they used to call them the buzzin dozen,,

theres always hope for the hopeless,,

il do that BMT,new to this site,

does anyone know where i can find parts for the horn button in the large RWS 713 steering wheel?i need to pull the wheel to see if the contact ring is there but im needing everything under the emblem,it looks like it fastens with 3 screws to the wheel,the mack dealer was useless,

you would think trash hauler that they would put a trap door between the seats to get at that area,,

and wa la,,all 3 settings work,,im a happy guy

i bought an 85 713 RWS and the compressor,bracket is missing,going to fab a different condenser to the front of radiator and hopefully find a later style compressor from an international that uses the same motor [NTC CUMMINS] and same belt groove,,everything else is there,will have the hoses made up also