Jump to content
Sign in to follow this  
Moparmike

2000 rd690 pushing water out tank after new thermostat

Recommended Posts

Replace the stat cause it went bad now the truck push water out the little hole in the holding tank. What would cause this truck doesn't run hot just lighting volt come on bout 3 days add water bout 3 days later light on depending on how hard the truck is worked.

Quad axle dump truck 

20190415_144338.jpg

Share this post


Link to post
Share on other sites

Getting water in air tank is this the compressor head gasket going out

Share this post


Link to post
Share on other sites
4 hours ago, Mack Technician said:

What's the freezing point of the water coming out of the air tank?

Mo sure  but it's more then I have normally seen .

Share this post


Link to post
Share on other sites

Does it pull back into the top tank after you turn the truck off and it cools down.    If it don't top tank rad cap might not be sealing up good and letting it push out in bottom tank.  put new lid on it make sure it is the right one with a double seal  and leave the bottom tank empty. top tank when heating up expands into bottom tank, if rad cap seals good and hose to bottom tank is good it will suck it back in after cutting it off.  Mack factory rep told us 20 years ago the we should leave the bottom tank empty that it not big enough for the expansion of the water when it heats up and expands into bottom tank.

  • Like 1

Share this post


Link to post
Share on other sites
1 hour ago, br549 said:

Does it pull back into the top tank after you turn the truck off and it cools down.    If it don't top tank rad cap might not be sealing up good and letting it push out in bottom tank.  put new lid on it make sure it is the right one with a double seal  and leave the bottom tank empty. top tank when heating up expands into bottom tank, if rad cap seals good and hose to bottom tank is good it will suck it back in after cutting it off.  Mack factory rep told us 20 years ago the we should leave the bottom tank empty that it not big enough for the expansion of the water when it heats up and expands into bottom tank.

If not empty, real low.     terry:MackLogo:

Share this post


Link to post
Share on other sites
17 hours ago, br549 said:

Does it pull back into the top tank after you turn the truck off and it cools down.    If it don't top tank rad cap might not be sealing up good and letting it push out in bottom tank.  put new lid on it make sure it is the right one with a double seal  and leave the bottom tank empty. top tank when heating up expands into bottom tank, if rad cap seals good and hose to bottom tank is good it will suck it back in after cutting it off.  Mack factory rep told us 20 years ago the we should leave the bottom tank empty that it not big enough for the expansion of the water when it heats up and expands into bottom tank.

No it doesn't pull back in the top tank .it just push it out the small hole in the bottom tank cap and that's it ..I replaced the cap on both tanks at the same time I did thramastat but I could have got a bad cap.

Share this post


Link to post
Share on other sites
12 hours ago, Mack Technician said:

How hot did things get before you changed the stat?

Driver said light came on then they stopped never went above 200 driver said but we know how that goes..it doesn't get hot now but light comes on and if you don't add water truck shuts down by computer. 

Running 71000 bout 8 10 hr day use bout half gallon 2 to 3 days .you can see where it pushes out on the frame tanks have more then normal water 

Share this post


Link to post
Share on other sites

I have a monitor for checking CO level in the upper tank, but that doesn't do you a bit of good. If coolants coming out of the tank after self-leveling clearly something is pushing it.

Someone you know works in industry and has a handheld for sniffing/reading air PPM. Got to get it and wand the tank air space after a run period to see what's lingering.   

Share this post


Link to post
Share on other sites

Was the tstat marked, top or front?  Was it installed correctly. 

 

Anybody know what would happen if you didn’t put the tstat in with marking in the right spot?  

Share this post


Link to post
Share on other sites

There is a vent hole that should be on the top.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...