UP1 Posted May 21, 2023 Share Posted May 21, 2023 Hi, 2006 Granite dump truck CT 713, E7 460 with 18 speed Maxitorque.350 000 km on it! When loaded going over bumps on highway I hear rattling noise. Its only happens when going around 95 km/h, slower speed its fine. All shocks ,airbags ,U Bolts ,leafsprings, exhaust etc are replaced. I did replace smaller driveshaft between axels, noticed yesterday there is a bit movement(when pushing up down) on the bigger slip driveshaft ,Could that be a problem or power divider? Any help would be appreciated! Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/ Share on other sites More sharing options...
Joey Mack Posted May 22, 2023 Share Posted May 22, 2023 How about bolt on stuff, like the grill guards, bumper mounts? Tough one to dia. Without seeing the truck.. Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531798 Share on other sites More sharing options...
UP1 Posted May 22, 2023 Author Share Posted May 22, 2023 I did check those ,all the bolts what can I see are tight, dosent sound that kind of rattle, more likely when something is squeeze together or extended too much. It sounds like its doing it when exiting to bump, kind a jumps a pit. When empty its fine just when loaded! Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531801 Share on other sites More sharing options...
UP1 Posted May 22, 2023 Author Share Posted May 22, 2023 And only when cruise are on or I hit gas pedal, when let gas off before bump its just fine. Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531802 Share on other sites More sharing options...
Joey Mack Posted May 22, 2023 Share Posted May 22, 2023 Maybe spray paint some suspension components that move, I guess use the same color as the frame. Then go back and see if the paint is rubbed off down to shiny metal, that may point you to it.. Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531810 Share on other sites More sharing options...
UP1 Posted May 22, 2023 Author Share Posted May 22, 2023 I will try that . What you think is slip yoke on driveshaft might rattle ,grind? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531825 Share on other sites More sharing options...
Joey Mack Posted May 22, 2023 Share Posted May 22, 2023 I would expect a vibration in the driveline. is it a dump truck? do you have a teel tube under the body that has the stop cable in it? maybe a weld broke and its rattling.. Lift axle shocks?? steerable lift axle tie rod?? or other parts of it? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531826 Share on other sites More sharing options...
UP1 Posted May 22, 2023 Author Share Posted May 22, 2023 Yes its dump truck, dont have lift axle, just replaced all shocks! It has steel tube for stop cable, will check that tomorrow, thanks! Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531828 Share on other sites More sharing options...
Joey Mack Posted May 22, 2023 Share Posted May 22, 2023 I'm Tryin'.. am I part phycic? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531831 Share on other sites More sharing options...
UP1 Posted May 23, 2023 Author Share Posted May 23, 2023 Looks like it!😃 Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-531840 Share on other sites More sharing options...
Joey Mack Posted May 28, 2023 Share Posted May 28, 2023 How's it goin'?? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-532083 Share on other sites More sharing options...
UP1 Posted May 29, 2023 Author Share Posted May 29, 2023 Hi. There is steel tube and it is loose from weld, but it aint it. Its more louder noise, kind a mix of grinding rattling. Anyway I took it to shop ,they sayd all the driveline is fine. I guess have to wait when something broke down. Would you know how much drive height have to be on, maybe something there! Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-532094 Share on other sites More sharing options...
MACKS Posted May 29, 2023 Share Posted May 29, 2023 Could be the piston banging around,they always been known to make a racket.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-532101 Share on other sites More sharing options...
Joey Mack Posted May 29, 2023 Share Posted May 29, 2023 Heres a crazy thought... is the heat shield on the air cleaner housing loose? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-532107 Share on other sites More sharing options...
UP1 Posted May 30, 2023 Author Share Posted May 30, 2023 Doesn't sound like a piston,it only does it when going over pump. Yes the heat shield is loose, will but extra screw there, don't think thats doing it. It sounds like worn out bearing, can it be? Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-532196 Share on other sites More sharing options...
Ricky Beals Posted July 15, 2023 Share Posted July 15, 2023 On 5/22/2023 at 3:50 PM, Joey Mack said: I would expect a vibration in the driveline. is it a dump truck? do you have a teel tube under the body that has the stop cable in it? maybe a weld broke and its rattling.. Lift axle shocks?? steerable lift axle tie rod?? or other parts of it? JoJo what’s the stop cable for? I have it and one end is tied to the PTO on hydraulic pump and goes to rear of dump bed. Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-534863 Share on other sites More sharing options...
MACKS Posted July 15, 2023 Share Posted July 15, 2023 6 hours ago, Ricky Beals said: JoJo what’s the stop cable for? I have it and one end is tied to the PTO on hydraulic pump and goes to rear of dump bed. It’s to disconnect the pto at the height u have it adjusted for so u don’t blow the seals out of the piston.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-534864 Share on other sites More sharing options...
Joey Mack Posted July 15, 2023 Share Posted July 15, 2023 Yeah,,,, what MACKS said Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-534870 Share on other sites More sharing options...
JoeH Posted July 16, 2023 Share Posted July 16, 2023 (edited) I know the cable/tube you're talking about, but I would have assumed the system has a pressure relief valve for that... My single axle dump truck has a piston with a built in bypass that when it fully extends it just diverts oil internally out a secondary hose. Edited July 16, 2023 by JoeH Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-535014 Share on other sites More sharing options...
Joey Mack Posted July 16, 2023 Share Posted July 16, 2023 Yes sir,, But of course a skilled driver knows when to stop trying to raise the bed.. Used to be you could feel it when the cylinder is all the way up.. then you just move the lever to neutral.. Just sayin.. Hope you are having a good day... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72878-rattling-when-going-over-bumps/#findComment-535015 Share on other sites More sharing options...
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