mrsmackpaul

well the 12 speed is the best tranny I have ever driven had trouble splitting into low once crap built up inside the gears on the low range side takes a bit to pull it all apart but cleaned it all out ran as good as new if it is only in one gear I have no answer if it is on all gears maybe the air ram on the box lid or the regulator is out of adjustment and not enough pressure ?? Paul ps I never use the clutch for splitting gears didnt no I was meant to

well I have been waiting for all sorts of advice but not much has happened so heres what I do roadranger I just change down through high range using engine brake if any fitted and leave it in high range until stopped just push the clutch in near the end the Mack 12 speed I just leave it in high split or low split and change down with engine brake working dynatard not that it does much if it is a heavy load ie over 60 ton I would split each down to 3 rd and then change down full gears was told once it is cheaper to wear out brakes than rebuild gearboxs but it all depends how fast your trying to slow down if some clown has cut in front well there mighten be much time for this fancey down shifting I guess what Im trying to say is each time you stop it is completley different Paul

Mack Australia and Kato were owned by the same company Great Western Group I believe someone feel free to correct me on that GWG also owned Mazda Australia Leader trucks Bertlit trucks and a whole host of other things Paul

mate I just got mine from Mack Laverton in Melbourne I wouldnt do it again I would just go through my local fuel injection man next time as the blokes at Mack dont seem to no bugger all about older trucks and dont seem to care either .They ( Mack ) gave me the number for the bloke that they get to do the pump and he seemed ok to me to talk to after the fact .Mack told me the pump was the problem I changed the pump over and it made no difference well that was a waste of $5500.00 then they didnt want no me so I spoke to my local man he came and had a look and the problem was found very quickly all he works on is tractor's trucks and 4x4's wish I had have called him first live and learn I guess good luck might have to say what part of this wide brown land your in for some pointers Paul

88 I'm feeling bloody old !!!!!!!!!!!!!!!!!!!!!! Paul

need to let engine revs drop about 800 revs between gears when going up and raise them about 800 going down through the gears you will probably never need deep reduction so just leave it in direct watch the tacho to start with it will become a piece of cake fairly quickly good luck Paul

came across this a while ago if you like Macks working hard this should fit the bill hope it works after the big intro http://www.youtube.com/watch?v=7Ia0b_WLajo seeya Paul

the problem is once you see it you cant unsee Im gonna need some hours on Dr Phils couch after that picture on page 2

My goodness I've seen some clowns in my time but well this would have to take the cake I just cant believe that even after old mate flanges getting up the ramps and tries to put it on its side the fella trying to pull it on the trailer still goes like a bull at a gate and in front of everyone to with the company shirts on it will do wonders for there reputation yep and as above has been stated could have backed it on could have pulled it on with the chain could have tried so many other ways but what would I know Paul

easy my old mrsmack R 600 320 coolpower 12 speed 58000lb rated to 115ton and will pull all with more than that not bad for something 33 years old Paul

If you are going to use compressed air always fill with water first as the explosive pressure will be greatly reduced ie theres a lot less to expand really quickly if it was to go bang let us know how you go removing dents as I have tanks that have the same type of dents seeya Paul

mate had the same thing on my 320 coolpower and it needed the heads done up then it idled perfect but I think this was the exception rather than the norm a compression test will soon tell the difference the normal cause is the governer is warn out I had changed my injector pump but it made no change then I had to start looking further hope this is of some help seeya Paul does it start fine ???