Hobert62 Posted May 31, 2016 Share Posted May 31, 2016 How available is the front crankshaft oil seal for my 1963 b67 with a 673 na. Mine leaks when the truck is running. So while front is off truck and I plan on replacing hoses figured I'd just pull radiator and replace seal. I haven't check into it alot but figured I'd ask here first. Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/ Share on other sites More sharing options...
j hancock Posted May 31, 2016 Share Posted May 31, 2016 Federal Mogul part # FP-446GC1115 and Redi-Sleeve #99324 if you find the crank has a groove worn into it. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335107 Share on other sites More sharing options...
Hobert62 Posted May 31, 2016 Author Share Posted May 31, 2016 Ok thank you. I figured it shouldn't be to hard to come up with, but wanted to make sure before I dug in to deep Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335108 Share on other sites More sharing options...
kscarbel2 Posted May 31, 2016 Share Posted May 31, 2016 36 minutes ago, j hancock said: Federal Mogul part # FP-446GC1115 and Redi-Sleeve #99324 if you find the crank has a groove worn into it. The Mack front crankshaft oil seal is a 446GC1115. I'm sure that Barry can fix you right up. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335109 Share on other sites More sharing options...
Hobert62 Posted May 31, 2016 Author Share Posted May 31, 2016 I did look at Barry's on my phone but didn't see anything. I think they had the rear one listed. Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335111 Share on other sites More sharing options...
kscarbel2 Posted June 1, 2016 Share Posted June 1, 2016 1 hour ago, Hobert62 said: I did look at Barry's on my phone but didn't see anything. I think they had the rear one listed. Wait a minute.....I'm having a flashback. Does your seal have an outer diameter or 4 inches, or 4-1/4 inches ? If it's 4-1/4", you need a 446GC181 (Which I'm sure that revered caped crusader "Mack Man ".....err Barry can provide you) If it's 4" (probably not), your original part number 446GC316 superceded to 446GC1115. Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335112 Share on other sites More sharing options...
j hancock Posted June 1, 2016 Share Posted June 1, 2016 Should be OK for a NA END-673 because the size variation came with engines like the ENDT-675, ENDT-676 among others. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335114 Share on other sites More sharing options...
Hobert62 Posted June 1, 2016 Author Share Posted June 1, 2016 2 more questions. Why is the fan not made symmetrical? What do I have to do to change the front motor mount? Do I just replace the rubber or do I have to find the entire cast piece that bolts to frame? Mine is shot and the motor is just sitting in the bottom of it, with some marks where the pulley rubs the crossmember sometimes. Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335174 Share on other sites More sharing options...
Hobert62 Posted June 1, 2016 Author Share Posted June 1, 2016 Ok found the motor mount rubber thing at watts for $60 Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335175 Share on other sites More sharing options...
Hobert62 Posted June 5, 2016 Author Share Posted June 5, 2016 Front seal is currently a "national 411275R" It's outside is 4 1/4" Quote Link to comment https://www.bigmacktrucks.com/topic/45446-front-crank-oils-seal/#findComment-335547 Share on other sites More sharing options...
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