Ricky Beals Posted September 30, 2022 Share Posted September 30, 2022 I have a 2000 rd688 that is a dump truck. When the air pressure gets to about 100 the cab raises up a little in the rear. I’m thinking this is to only level the cab. Can airbags bring added to this truck for ride comfort? Had an old trucker to tell me I should add airbags to cab and it would ride a lot better and help my front suspension. Quote Link to comment Share on other sites More sharing options...
Popular Post Joey Mack Posted September 30, 2022 Popular Post Share Posted September 30, 2022 Yes it's air ride cab.. change the cab shocks. I bet they are junk . 3 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted September 30, 2022 Share Posted September 30, 2022 airbags will not only make a better ride ,and help suspension the improvement on your back after driving all day will be priceless! 2 Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted September 30, 2022 Share Posted September 30, 2022 Especially in a dump truck 2 Quote Link to comment Share on other sites More sharing options...
tjc transport Posted September 30, 2022 Share Posted September 30, 2022 your truck already has air ride cab. as JoJo suggested, check the shocks and cab leveler valve and rods. they are probably shot after 22 years. 1 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 Share on other sites More sharing options...
Ricky Beals Posted September 30, 2022 Author Share Posted September 30, 2022 Let’s dummy this down please. Joey is saying shocks. If I’m understanding you guys I already have shocks under cab which are probably wore out. Are those air shocks? How can I check them? Mechohaulic is talking airbags and this would be totally different than what I have correct? Quote Link to comment Share on other sites More sharing options...
MACKS Posted September 30, 2022 Share Posted September 30, 2022 After inflated the cab should sit perfectly level,to check shocks pull down on cab while standing on the ground,it should bounce up one time,kinda like checking the shocks on a car.. 1 1 Quote Link to comment Share on other sites More sharing options...
Ricky Beals Posted September 30, 2022 Author Share Posted September 30, 2022 Ok I will check that. I can tell you my cab sits low in the rear. I can feel it move up around 100psi. That’s what prompted the guy to say something to me. My cab sits low in the rear with full air. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted September 30, 2022 Share Posted September 30, 2022 (edited) Ok . So the cab ride is out of adjustment. Could be due to worn or broken control rod.. at this point, start fresh.. new leveling valve, rod, air bag/s, and cab shocks.. you can un hook the Control rod, when air is above 100, and raise the cab by hand with the valve lever, place a block of wood under the cab edge. And make the repair.. the air bags unscrew from the cab , if they are stuck, you can un do the bottom, remove the air line and use an oil filter wrench to get thém out.. Edited September 30, 2022 by Joey Mack Poor sperring 2 Quote Link to comment Share on other sites More sharing options...
Ricky Beals Posted September 30, 2022 Author Share Posted September 30, 2022 Any schematic of this JoJo Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted September 30, 2022 Share Posted September 30, 2022 No. It is super easy.. what you see is what it is.. really is an easy repair. Raise the body, set the body braces in place, and right there behind the cylinder, is everything, right in the open.. all the work is done out side the cab, at the rear.. 1 Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted September 30, 2022 Share Posted September 30, 2022 As Joey has said, super easy Okay here is my observations of many air ride R models I have never had to change shockers, I have always found that the linkage between the ride height valve and the cab isnt strong enough and must slowly over time bend thru normal use If I disconnect the linkage and operate the valve until I have 1 1/2 - 2 inches between the rubber stop and the bottom of the cab it sits on the ride is improved to level of comfort a Mack owner can only dream of The little air bag should be sitting reasonably stout but not fully extended Lift the little arm up and down, fully extend the air bag, the fully collapse it This will give you a good indication of were you want it to sit and the clearance available So once you have established this bend the linkage to suit, however the trick is to have it just a tad higher than were you want so any slack in the valve linkages and the valve and the connecting rod are taken up Now the lecture, dont waste your time undoing and trying to adjust the ends like most knob jockeys do at the start, remember this was the correct setting when it left the factory and has slowly bent And there wont be enough thread to get the extra length needed Then sit back and just glide along on a cushion of air, oh yeah baby it will be like a whole new truck SUPER SMOOTH NOW BABY......... Anyway this is what I have found Paul 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Joey Mack Posted September 30, 2022 Popular Post Share Posted September 30, 2022 Paul,,,, That's one of the Breast explanations so far.. Your knowledge is Udderly amazing. You always Bust out some smart sh!t.. You don't Milk it, just get to the point... Jojo 1 1 9 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted October 1, 2022 Share Posted October 1, 2022 Hey Paul, Do you have the part number for those air bags you posted.. I want to add something like that to my old '48 Int. KB-7.. It looks like I would get a Smooth Ride.. jojo 1 Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted October 1, 2022 Share Posted October 1, 2022 If you squint your eyes real tight and get in there real close you should be able to read it Paul Quote Link to comment Share on other sites More sharing options...
Popular Post Mark T Posted October 1, 2022 Popular Post Share Posted October 1, 2022 Joey....those bags cost a fortune, and after a while I'd expect some severe sagging. 3 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted October 1, 2022 Share Posted October 1, 2022 so many positives to observing the forums when the day is not going good. they chest brighten everything LOL 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Mark T Posted October 1, 2022 Popular Post Share Posted October 1, 2022 18 hours ago, Joey Mack said: Hey Paul, Do you have the part number for those air bags you posted.. I want to add something like that to my old '48 Int. KB-7.. It looks like I would get a Smooth Ride.. jojo I think they're part number 44 DDD, but as always.....check the VIN to be sure 1 2 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted October 2, 2022 Share Posted October 2, 2022 NOW THIS HAS TO STOP!! LOL when I laugh this much I cough uncontrollably 😂😂. wife wanted to know what was so funny;; I showed her . positive response ;:: i just won't post it .sorry honey your 36 D's are nice , but ! LOL Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted October 2, 2022 Share Posted October 2, 2022 the new style cellphone holder 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted October 2, 2022 Share Posted October 2, 2022 (edited) I WILL NOT !! show my boss, I mean my wife the post... Jojo Hell no !!!! Edited October 2, 2022 by Joey Mack Poor sperring 2 Quote Link to comment Share on other sites More sharing options...
tjc transport Posted October 2, 2022 Share Posted October 2, 2022 9 hours ago, Joey Mack said: I WILL NOT !! show my boss, I mean my wife the post... Jojo Hell no !!!! chicken.... it is obvious who wears the pants in your house!!!! 🤣 2 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 Share on other sites More sharing options...
Popular Post Mark T Posted October 2, 2022 Popular Post Share Posted October 2, 2022 Jo Jo happy wife happy life. don't take the bait from tjc..... he's safe in NJ 1 1 1 Quote Link to comment Share on other sites More sharing options...
tjc transport Posted October 2, 2022 Share Posted October 2, 2022 and also happily single now. i never replaced the money spending blood sucking leech after the last one left. 1 1 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 Share on other sites More sharing options...
mechohaulic Posted October 3, 2022 Share Posted October 3, 2022 smart man ; some of us never learn ;;LOL Quote Link to comment Share on other sites More sharing options...
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