steve s. Posted December 9, 2016 Share Posted December 9, 2016 A friend recently showed me an early R model he has been familiar for a long time. There are two small electric bowers under the hood, on the firewall. There is one on each side of the engine, which I think is a thermodyne. The passenger side blower has a hose going to the side valve (tappet?) cover, and the driver side blower is connected with a hose to the top of the flywheel housing. The truck's owner says these are original components. What are they for? Quote Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/ Share on other sites More sharing options...
41chevy Posted December 9, 2016 Share Posted December 9, 2016 Clutch one probably "cools" the clutch assembly.(?) The one one the block is similar to my race cars vacuum pump for the crankcase. It removes crankcase pressure so the engine winds up faster. Never seen either of those on a truck. What was the R originally used for? 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/47960-early-r-model-with-two-blowers/#findComment-354529 Share on other sites More sharing options...
gearhead204 Posted December 9, 2016 Share Posted December 9, 2016 I would guess this truck was in some type of explosive environment, and these fans worked like a blower on an inboard boat engine. the flywheel blower would prevent an explosion when the starter was engaged and the engine one would remove explosive fumes from the engine block.......but that's only a guess ! Quote Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/#findComment-354533 Share on other sites More sharing options...
steve s. Posted December 9, 2016 Author Share Posted December 9, 2016 The truck has always been a tractor, pulling a lowboy for an excavator. Maybe blower isn't the right thing to call them, they do seem to be there to pull from the hoses, rather than blow into them. Quote Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/#findComment-354534 Share on other sites More sharing options...
j hancock Posted December 9, 2016 Share Posted December 9, 2016 IDK. That is not an early version of an R-771 with a DD 12V71N though... Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/#findComment-354535 Share on other sites More sharing options...
57 bcr Posted December 10, 2016 Share Posted December 10, 2016 "Allentown,skip the turbo and put a couple of small blowers on it instead".......is how the phone call might have gone! A Powered Positive Crankcase Ventilation system? New use for moms old personal hair dryer or dads heat gun? ......signed I.M. Stumpped (course,that don't take much) Al Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/#findComment-354594 Share on other sites More sharing options...
fxfymn Posted December 10, 2016 Share Posted December 10, 2016 If you fart one more time I'm going to have to install a positive ventilation system in this thing! 1 Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/47960-early-r-model-with-two-blowers/#findComment-354599 Share on other sites More sharing options...
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