ducky698 Posted July 27, 2009 Share Posted July 27, 2009 Hi, is there any reasone why the crossmembers are fitted in the chassis with the hollow section facing forward? the manual does not mention it, but have seen them only fitted this way.I have turned mine the other way so the dirt doesnt get held there.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/ Share on other sites More sharing options...
RowdyRebel Posted July 27, 2009 Share Posted July 27, 2009 Hi, is there any reasone why the crossmembers are fitted in the chassis with the hollow section facing forward? the manual does not mention it, but have seen them only fitted this way.I have turned mine the other way so the dirt doesnt get held there.Grant Not sure what you mean. What kind of truck? My CH, there is no hollow part facing front OR rear...looks like this:(here's a cross section view....it broke) The hollow section faces downward like this:Do you have any pics to help explain? Quote When approaching a 4-way stop, the vehicle with the biggest tires has the right of way! Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38479 Share on other sites More sharing options...
ducky698 Posted July 27, 2009 Author Share Posted July 27, 2009 Hi, i have pics, but it wont let me post them. i got image size down to 48kb and its trying to tell me its to large!its the stamped c channel style crossmembers like on the flintstone and r models through the 70s, i have noticed they have the hollow part facing forward so it catches all the dirt. Grant Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38480 Share on other sites More sharing options...
fjh Posted July 27, 2009 Share Posted July 27, 2009 Hi, i have pics, but it wont let me post them. i got image size down to 48kb and its trying to tell me its to large!its the stamped c channel style crossmembers like on the flintstone and r models through the 70s, i have noticed they have the hollow part facing forward so it catches all the dirt. GrantI don't beleive there is a reason. I like your idea beter anyway! Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38482 Share on other sites More sharing options...
ducky698 Posted July 27, 2009 Author Share Posted July 27, 2009 I don't beleive there is a reason. I like your idea beter anyway! your allways going up muddy roads here, to me it doesnt make sense having them the other way as they fill up with dirt. I must have scraped 5lbs of mud of the inside of these. i also relocated my second one further back to, it was only 26 inches or so away from front one. now its 55inches away.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38483 Share on other sites More sharing options...
Mark from OZ Posted July 27, 2009 Share Posted July 27, 2009 Hi, is there any reasone why the crossmembers are fitted in the chassis with the hollow section facing forward? the manual does not mention it, but have seen them only fitted this way.I have turned mine the other way so the dirt doesnt get held there.GrantGrant Why don't you ask Mack if they still have the 2 piece crosmembers. They fit in the same holesand are flat still use the same bolt pattern. I replaced all of them on mine, They never break and you can replace them easy. They wern't expensive..... Mark Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38485 Share on other sites More sharing options...
ducky698 Posted July 28, 2009 Author Share Posted July 28, 2009 Grant Why don't you ask Mack if they still have the 2 piece crosmembers. They fit in the same holesand are flat still use the same bolt pattern. I replaced all of them on mine, They never break and you can replace them easy. They wern't expensive..... MarkHello, these ones are back in for now. it wouldnt surprise me if they still have them as you can still buy most other parts.frame rails are still available, there is 11 sets in Sydney, a new R model cab there also.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38501 Share on other sites More sharing options...
r600 Posted July 28, 2009 Share Posted July 28, 2009 Hello, these ones are back in for now. it wouldnt surprise me if they still have them as you can still buy most other parts.frame rails are still available, there is 11 sets in Sydney, a new R model cab there also.Granthey grant funny you tell me mack have 11 sets ,i asked my local dealer 2 years ago to see if they could get rails never got back to me so extended mine,some spare parts guys dont give a sh-t,what the cab worth do you know???cheers adrian Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38521 Share on other sites More sharing options...
r600 Posted July 28, 2009 Share Posted July 28, 2009 Hello, these ones are back in for now. it wouldnt surprise me if they still have them as you can still buy most other parts.frame rails are still available, there is 11 sets in Sydney, a new R model cab there also.Granthey grant funny you tell me mack have 11 sets ,i asked my local dealer 2 years ago to see if they could get rails never got back to me so extended mine,some spare parts guys dont give a sh-t,what the cab worth do you know???cheers adrian Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38522 Share on other sites More sharing options...
ducky698 Posted July 28, 2009 Author Share Posted July 28, 2009 hey grant funny you tell me mack have 11 sets ,i asked my local dealer 2 years ago to see if they could get rails never got back to me so extended mine,some spare parts guys dont give a sh-t,what the cab worth do you know???cheers adrian Hello, had that problem here with spare parts people, they are on the ball in Brisbane, Mat Hendry you want to talk to.the cab is new and in Sydney, around the 30,000 mark, the chassis rails are 3300.00 per each outer, the inners are 3100.00 each, they are long enuf to run a 72 inch bunk and are un drilled!and for that price is why i am rebuilding these poor bent things. Grant Quote Link to comment https://www.bigmacktrucks.com/topic/10157-frame-crossmembers/#findComment-38533 Share on other sites More sharing options...
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