Scott74 Posted October 13, 2021 Share Posted October 13, 2021 Hi all, I'm new to this forum but I need some help. I just bought a 74 Western RL700l dump truck. It has a 10 speed maxitorque transmission with a PTO on the side. The side of the tranny has D107 on it. The selector has D, L, N, R. It is not moving out of N. The selector moves freely but the transmission is not coming out of N. The air hose to the top left blows a lot of air out all the time. Do you think something is stuck? I'm lost, replaced the O ring on the innards of the selector, the one that goes over the port holes. There are four ports on the back, one on the top right, and on the top left on the bottom not on the wall like the others. Any help would be appreciated! Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/ Share on other sites More sharing options...
tjc transport Posted October 13, 2021 Share Posted October 13, 2021 you have an air leak in the selector somewhere preventing the trans from shifting out of neutral. it should not be leaking air Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481258 Share on other sites More sharing options...
mrsmackpaul Posted October 13, 2021 Share Posted October 13, 2021 Check the air pressure, if the regulator isnt working and the pressure is to high it will just keep popping O rings, should be around 60 - 65 psi Then move onto other problems Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481260 Share on other sites More sharing options...
Scott74 Posted October 13, 2021 Author Share Posted October 13, 2021 I forgot to mention the hose for the port On the front left wasn't connected to anything underneath on the tranny. Would that be the exhaust port? That is where all the air is consistantly coming out. Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481266 Share on other sites More sharing options...
Steve L Posted October 13, 2021 Share Posted October 13, 2021 (edited) Yes that is the exhaust port, time for new ‘0’ rings in the gearbox air shift cylinders Scott. Edited October 13, 2021 by Steve L Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481270 Share on other sites More sharing options...
Scott74 Posted October 13, 2021 Author Share Posted October 13, 2021 Steve L could you do me a favor and explain or show me a picture of what the gear box shift cylinder is please? Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481274 Share on other sites More sharing options...
Scott74 Posted October 15, 2021 Author Share Posted October 15, 2021 What weight oil should go in the transmission? Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481387 Share on other sites More sharing options...
Scott74 Posted October 16, 2021 Author Share Posted October 16, 2021 I changed o rings and now air is coming out of exhaust port and hole in bottom of cylinder. What am I doing wrong? Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481414 Share on other sites More sharing options...
Scott74 Posted October 16, 2021 Author Share Posted October 16, 2021 On 10/13/2021 at 2:56 AM, tjc transport said: you have an air leak in the selector somewhere preventing the trans from shifting out of neutral. it should not be leaking air I took the selector apart and replaced an o ring because it was leaking air. After I did that is when I have the problem. Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481415 Share on other sites More sharing options...
mrsmackpaul Posted October 16, 2021 Share Posted October 16, 2021 You need to check the air pressure in the transmission first, once you establish thats correct then move onto other issues Air pressure should be around 60 - 65 psi, any more and you'll keep popping the seal out of the selector Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481418 Share on other sites More sharing options...
Scott74 Posted October 16, 2021 Author Share Posted October 16, 2021 So check the pressure of the line that feeds the air to the selector? Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481424 Share on other sites More sharing options...
mrsmackpaul Posted October 16, 2021 Share Posted October 16, 2021 Correct that is correct Paul Quote Link to comment https://www.bigmacktrucks.com/topic/68469-maxitorque-problem/#findComment-481434 Share on other sites More sharing options...
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