slingblade Posted May 23, 2015 Share Posted May 23, 2015 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= Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/ Share on other sites More sharing options...
41chevy Posted May 23, 2015 Share Posted May 23, 2015 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 1 Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290904 Share on other sites More sharing options...
gearhead204 Posted May 23, 2015 Share Posted May 23, 2015 i think Paul nailed it! looks like an accumulator. a lot of guys were firm belivers in ether using them or electeric preoilers prior to start up. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290936 Share on other sites More sharing options...
slingblade Posted May 23, 2015 Author Share Posted May 23, 2015 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. Paulim thinking your right,someone else also thought it was,thanks, Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290945 Share on other sites More sharing options...
Solution theakerstwo Posted May 24, 2015 Solution Share Posted May 24, 2015 That looks like a 475 cummins with a variable cam follower and that is the air cylinder to shift the cam followers. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290959 Share on other sites More sharing options...
theakerstwo Posted May 24, 2015 Share Posted May 24, 2015 give me the eight digit # of the engine and I may be able to look it up. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290960 Share on other sites More sharing options...
carlotpilot Posted May 24, 2015 Share Posted May 24, 2015 don`t know the specific part name but what is pictured is part of a( mvt)mechanical varieable timing set up 1 Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290965 Share on other sites More sharing options...
41chevy Posted May 24, 2015 Share Posted May 24, 2015 That looks like a 475 cummins with a variable cam follower and that is the air cylinder to shift the cam followers.Glenns right it is not an Accumulator. I forgot about Cummins developing a mechanical timing set up. They were mechanical using a fuel pressure to work and air switch. air on an eccentric arm on the cam followers that retarded valve and injector timing by using higher fuel pressure as a trigger. Cummins used it on a few engines back when. I recall seeing one in a Autocar a long while ago. No Accumulator!!! Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-290973 Share on other sites More sharing options...
slingblade Posted May 25, 2015 Author Share Posted May 25, 2015 give me the eight digit # of the engine and I may be able to look it up.18107945 CPL# 0586 this cam advance system,whats it for?is it manual or automatic? Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-291208 Share on other sites More sharing options...
theakerstwo Posted May 25, 2015 Share Posted May 25, 2015 Yes it is a NTC 475 BC111 It should have twin turbos and yes the timing actuator is done auto which is controlled by fuel pressure.The more power you pull out of it the more the cam timing is retarded 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-291209 Share on other sites More sharing options...
slingblade Posted May 26, 2015 Author Share Posted May 26, 2015 the truck is a hoss glen,twin turbos,one compounds the other and it develops alot of torque in the lower rpms,got really lucky to find it on ebay,it was in sedro wooly Washington,almost in Canada,me and a friend drove it back to Georgia,43 hrs and 1700 in fuel,i work the truck almost every day, 1 Quote Link to comment https://www.bigmacktrucks.com/topic/40138-whats-this/#findComment-291229 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.