BulldogMack Posted Monday at 01:56 AM Share Posted Monday at 01:56 AM So my r model project is almost complete. Down to buttoning up a little bit of this and a little bit of that. This things been both a dream, and a headache. But it’s gonna be worth it. Anyways. I bought a new cowl bent as my other one was brittle and broken and the hinge had seized. When I brought the truck home, the vent was disconnected already. Nonetheless, I hooked up the linkage, and aired the truck up to check my cab ride height. Looks good. When I slide the switch over, it clicks, makes the “door” of the vent budge a small bit, and that’s it. I decided to call it a night. I am seeking knowledge from the Mack community on what to look for, after I get out of work tomorrow. I’ll unhook it to start and see if the linkage moves. To be fair I don’t know how these work, and am absolutely willing to learn. Thank you, and i appreciate the future advice! God Bless. Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/ Share on other sites More sharing options...
mrsmackpaul Posted Monday at 02:06 AM Share Posted Monday at 02:06 AM I'm thinking a squirt of normal engine oil would help a lot as the seal is probably dry as chips Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-587947 Share on other sites More sharing options...
BulldogMack Posted Monday at 02:12 AM Author Share Posted Monday at 02:12 AM 3 minutes ago, mrsmackpaul said: I'm thinking a squirt of normal engine oil would help a lot as the seal is probably dry as chips Paul Paul, I replace the seal, and the unit is entirely brand new. The hinge itself moved what I’d considered normal, but I will try to lube it up real good tomorrow. I’ll double check as well and make sure it’s not all bound up. If I am hearing some sort of function from the driver seat when I move the switch, would that indicate everything under the dash is working properly, and potentially the vent itself is bound up? Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-587949 Share on other sites More sharing options...
mrsmackpaul Posted Monday at 08:10 AM Share Posted Monday at 08:10 AM It could be bound up with paint maybe ? Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-587953 Share on other sites More sharing options...
mowerman Posted Monday at 09:23 PM Share Posted Monday at 09:23 PM lol must be a newer design,,,,my 66 is a hand crank,,,im assuming you have an air operated one,,,, i like the part about a headache,,,,seems the more i fix on mine,,,,the more i find wrong with it,,good luck bob Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588012 Share on other sites More sharing options...
Popular Post BulldogMack Posted Monday at 09:46 PM Author Popular Post Share Posted Monday at 09:46 PM 19 minutes ago, mowerman said: lol must be a newer design,,,,my 66 is a hand crank,,,im assuming you have an air operated one,,,, i like the part about a headache,,,,seems the more i fix on mine,,,,the more i find wrong with it,,good luck bob Brother, headache is an understatement! But it’s all coming together one piece at a f….. frustrating time lol. Yes it is air operated and I wish mine was a hand crank for simplicity sake, but here we are. I enjoy it just as much as I despise it at times. Hopefully soon she’ll be on her own merry way barking all over the county! 4 Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588014 Share on other sites More sharing options...
mowerman Posted 16 hours ago Share Posted 16 hours ago Well at my age I’m worried about dumping all this dough into this thing and croak before I get to enjoy finished product… Bob Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588046 Share on other sites More sharing options...
BulldogMack Posted 4 hours ago Author Share Posted 4 hours ago So, I have shimmed the rod as it had alotnof play in it (brand new, awesome…) and it opens 1/4 of the way it’s supposed to. The piston rod evidently isn’t long enough to fully open the vent. Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588110 Share on other sites More sharing options...
Brocky Posted 4 hours ago Share Posted 4 hours ago 33 minutes ago, BulldogMack said: So, I have shimmed the rod as it had alotnof play in it (brand new, awesome…) and it opens 1/4 of the way it’s supposed to. The piston rod evidently isn’t long enough to fully open the vent. Can you see how much the rod moves before it starts to move the vent door??? Maybe the actuating piston is using up a lot of its travel to start opening the door????? A longer rod???? Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588115 Share on other sites More sharing options...
BulldogMack Posted 3 hours ago Author Share Posted 3 hours ago 56 minutes ago, Brocky said: Can you see how much the rod moves before it starts to move the vent door??? Maybe the actuating piston is using up a lot of its travel to start opening the door????? A longer rod???? The rod is pretty spot on with the door as far as movement goes. The linkage had a lot of slip out of the box but I shimmed that up nice. I just don’t understand how different it is means that the piston has nowhere near enough travel to open it fully. I’m bummed I spent the money on a new vent but at the same time, I don’t have any time to fabricate a goofy linkage with a big swingto Make it work as is. I guess it’ll be inop for awhile. It’s winter anyways lol Quote Link to comment https://www.bigmacktrucks.com/topic/76263-r-model-cowl-vent/#findComment-588119 Share on other sites More sharing options...
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