BigRedMack Posted February 17, 2008 Share Posted February 17, 2008 model bhello i was wondering how you get the radiator fins to close if they do it automatic for cold or if they are suppose to come on with the heat knob i cant get them workin thanks Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/ Share on other sites More sharing options...
CML Service Posted February 17, 2008 Share Posted February 17, 2008 Could be several reasons the shutters don't close. 1) Perhaps they are not designed to close such as a gas engine model. 2) The air may be shut off. On the passenger side of the firewall in the engine compartment there is a filter/oiler unit for the shutters. It may look like a carburetor bowl. There is a shut off valve there on the flexible line. 3)The shutter stat may not be working. Follow line from filter/oiler to the shutter stat on the water manifold. 4) Bad air cyl or frozen linkage follow line from shutter stat to air cyl. Check for leaks or binding. Thats about all there is to the shutter system. The shutters should close after start up once you build air press and only open when needed for cooling. Chuck Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17081 Share on other sites More sharing options...
BigRedMack Posted February 17, 2008 Author Share Posted February 17, 2008 there is air comin through the hose but the fins still donot close how much air does it take to close them because i have a good stream of air but i can hold it back with my finger Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17099 Share on other sites More sharing options...
Rob Posted February 17, 2008 Share Posted February 17, 2008 there is air comin through the hose but the fins still donot close how much air does it take to close them because i have a good stream of air but i can hold it back with my fingerMy 64 B-61 snaps shut at 60psi on the air gauge without hesitation. Your hinges may need lubed also. Each shutter has a pivot point top and bottom that could bind.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17102 Share on other sites More sharing options...
BigRedMack Posted February 18, 2008 Author Share Posted February 18, 2008 ill lube up the fins and the accuator and see if that does it thanks Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17110 Share on other sites More sharing options...
Red Horse Posted February 23, 2008 Share Posted February 23, 2008 ill lube up the fins and the accuator and see if that does it thanks Guys, How does the shutterstat get its temp info telling the shutterstat to open or close? Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17194 Share on other sites More sharing options...
theakerstwo Posted February 23, 2008 Share Posted February 23, 2008 Guys, How does the shutterstat get its temp info telling the shutterstat to open or close? The shutterstat is in the water manfold and it knows all. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17195 Share on other sites More sharing options...
Red Horse Posted February 23, 2008 Share Posted February 23, 2008 The shutterstat is in the water manfold and it knows all.Duh! why did'nt I think of that. I have what was a B-68X that someone converted to a 673- left what I assume is original radiator in that did not have shutters. I just bought a 61 (for the cab and the 673 quad box) and the shutters and the shutterstat assembly looks good. Common sense would have told me that if I looked at it long enough. I also salvaged the radiator shutters and shell off of a junkyard B-42 -just before the shears got to it. and I have that complete assembly. Is the shutterstat rebuildable to any degree?Any info would be appreciated.Bob Quote Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17198 Share on other sites More sharing options...
theakerstwo Posted February 24, 2008 Share Posted February 24, 2008 Duh! why did'nt I think of that. I have what was a B-68X that someone converted to a 673- left what I assume is original radiator in that did not have shutters. I just bought a 61 (for the cab and the 673 quad box) and the shutters and the shutterstat assembly looks good. Common sense would have told me that if I looked at it long enough. I also salvaged the radiator shutters and shell off of a junkyard B-42 -just before the shears got to it. and I have that complete assembly. Is the shutterstat rebuildable to any degree?Any info would be appreciated.Bob You can exchange the shutterstat but i dont know if mack still cares them but most heavy duty parts store can order but call mack and they can tell you. glenn Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/3429-model-b-radiator-fins/#findComment-17205 Share on other sites More sharing options...
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