rjohnson67 Posted June 17, 2010 Share Posted June 17, 2010 (edited) Hi there, I have a 1989 R series, with a leaky windshield. I was wondering if I should use a silicon product, like the one mentioned, to fix it. Edited June 17, 2010 by rjohnson Quote Link to comment Share on other sites More sharing options...
Rob Posted June 17, 2010 Share Posted June 17, 2010 You would be best to pop the glass out of the rubber, remove the rubber from the cab and clean up any rust that may be present. This is usually the cause of windshield leaks in an R model. The rubber seal is not that expensive and depending on the condition of yours, worthy of replacement. If it is not soft and supple it very well may be the cause of your leak.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
RFC Posted June 17, 2010 Share Posted June 17, 2010 Welcome to owning a Mack:) Quote Link to comment Share on other sites More sharing options...
rhasler Posted June 17, 2010 Share Posted June 17, 2010 SB 631-001 describes the method used for installing windshields in MRU, LEU, RD, RB, DM, DMM, LE, and MR chassis. I will see if I have a copy to post. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment Share on other sites More sharing options...
rhasler Posted June 17, 2010 Share Posted June 17, 2010 Here is the information from the service bulletin I mentioned earlier. I don't know how well this works as I have not put a windshield in in quite some time. This is Mack Trucks prescribed method for windshield installation in these chassis. Also, follow Rob's advice and make sure all of the parts are clean and rust free before starting.SB 631-001.pdf Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment Share on other sites More sharing options...
rjohnson67 Posted June 22, 2010 Author Share Posted June 22, 2010 Okay, thanks a lot guys! Quote Link to comment Share on other sites More sharing options...
mikesheldon Posted July 23, 2010 Share Posted July 23, 2010 Call the dealer and tell them what happened , insist they replace the headline .Personally I've seen this happen several times before on different vehicles , I would recommend you locate the line coming out of your washer fluid reservoir and cap it off , simply don't use the washer for the back .When you are getting gas at the station use their window cleaner , shoot for 4 dollars a gallon you should make the person at the station come out and do it for you .If the dealer wont touch it or gives you the run-around , I would recommend some cleaner in a spray can called Tuff Stuff , it's in a yellow and red can and it's sold everywhere ( Wal-Mart , Auto Zone , Oreilly's , K-Mart ) I've had really good luck with it and it smells great too Quote Ford trucks Link to comment Share on other sites More sharing options...
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