M935 A2 - just brought it home - and took for first ride

[Fastfunco]

Just picked up a real CreamPuff- only 114 miles on her after a military rebuild in the sum of 89K
took out on first journey yesterday - 389 miles and half the day was on my ranch where there are no trails yet--
unbelievable what these things can do!!
my problem is-- in order to unlock the brakes - i have to hit the Emergency Spring Bypass Control-

I took a known good switch and installed it-- but same issue??

any ideas??

also

where is the oil pressure sender on these 8.3 turbo Cummins motors- need to check oil pressure-- its too low and i suspect the gauge and sensor are not right for each other-

Thanks in advance

 

[Fastfunco]

can anyone shed some light on this weird problem?? ive switched hoses around- tried a good switch -- has to have something to do with the new cab being installed i would think??

 

[73m819]

The spring brakes are released though a air switch worked by the emg. brake lever.

ALSO from the site rules.

"• Do not post in all CAPS or in giant run-on sentences without punctuation. Do not post as if texting and do avoid the use of texting abbreviations. We are not the grammar police but we want everyone to easily read your post in at least 8th grade English. It is extra work to post proper sentences from a smartphone but the result will be greatly appreciated. Please do your best to use capitalization, proper spelling and punctuation. It makes it easier for everyone to read"

 

[Fastfunco]

The spring brakes are released though a air switch worked by the emg. brake lever.

ALSO from the site rules.

"• Do not post in all CAPS or in giant run-on sentences without punctuation. Do not post as if texting and do avoid the use of texting abbreviations. We are not the grammar police but we want everyone to easily read your post in at least 8th grade English. It is extra work to post proper sentences from a smartphone but the result will be greatly appreciated. Please do your best to use capitalization, proper spelling and punctuation. It makes it easier for everyone to read"

Yes I am aware of this. However- If the spring brake emergency control knob is pulled out as it should be-- when I release the Brake Lever - truck will not move till i push in the emergency brake control on dash- then the brakes release-

sure wish I could figure this out!!

 

[Fastfunco]

anyone know where the oil sender is???

 

[Fastfunco]

anyone know where the oil sender is???

So----- Nobody knows the answer to either of these questions? Or are they just bad questions??
I was hoping I would not have to climb around this beast in order to figure it out.
Thanks anyways Steel Soldiers!!

 

[Skillzaw]

Pm sent

 

[chadande]

My e-brake occasionally exihbits this behavior as well. I thought I fixed it when I replaced the vent on the front service gladhand which was clogged, but it still happens from time to time. I suspect the air switch with the wheel on the e-brake handle is the prob?
Any other ideas?

 

[chadande]

I just went out and took a look. It looks like the oil pressure sending unit is on drivers side of engine block towards the rear. The thing sticking straight out with the wire connected to it.
Looks just like the one on my old duece.

Please correct me if I am wrong.

 

[Fastfunco]

Thank you very much- yes it is there - and I have a 60 psi sender and a 120 psi gauge-- actual pressure hot is 25 idle - 70 full speed

As for the Air Brake problem-- Grimlins!!!! Put it back together and it operates normally!

Thanks to you guys who helped out-- much appreciated!!

 

[Castle Bravo]

Something to keep in mind - The spring brake button on the dash has no normal civilian counterpart - Its basically a way to cage and un-cage the spring brakes from the cab. As far as I can tell, its main purpose is to add complexity to the 5 ton.

The parking brake dash button commonly found on air brake equipped trucks would have its military counterpart in the roller switch that the parking brake lever trips as you pull it up.

Perhaps your roller switch is staying "on" for some reason...

 

[goldneagle]

Actually it sounds like the parking brake is fine. (since the brakes released when he used the spring brake override switch on the dash and the brakes released) Maybe the air lines feeding the parking brake/spring brake lever are plumbed in wrong. (either at the lever or under the truck where they lead.)

 

[chadande]

As for the Air Brake problem-- Grimlins!!!! Put it back together and it operates normally

What did you take apart and put back together?