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Just won an auction - M1088A1

Floridianson

Floridianson

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[QUOTE="dwlindsey, post: 2617955, member: 13662 Idon't want to drive it very far until I get grease into all the zerks.
[/QUOTE]
Myself when I got my 1088 I went through all the hubs. One of the rear hubs was missing the thrust washer and thanks member NDT if I remember sent me one free. If you don't have the time to get to the rears the fronts are easy to just drain and refill. Hopefully no metal shavings.
 
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dwlindsey

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The auxiliary transmission cooler came off today. The plumbing seems to have been transmission to primary cooler, primary cooler to valve (thermostat valve?) then back to transmission. The valve has an output to the auxiliary cooler and and return from the Auxiliary cooler. I guess you would call that a secondary loop through the auxiliary cooler.

So it seems to me that when the oil is hot, it's diverted into the auxiliary cooler, back through the valve and back to the transmission.

So what I did today is to cap the ports on that valve that went to and from the auxiliary cooler. With those hoses off, we unbolted the auxiliary cooler and removed it.

If I'm right, with those ports in the valve that went to and from the auxiliary cooler capped off, there should be a loop - transmission to primary cooler, then primary cooler to valve, then valve to transmission. It should work fine. Can someone confirm or deny?

My plan is to get a new hose ASAP to do the return from primary cooler to transmission, which will eliminate the valve (thermostat valve?).

I don't plan to drive it far until I get the new hose, just in and out of the garage, because I can't raise the cab in the garage. Am I OK for short drives of 30 feet, until I get the new hose?
 
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dwlindsey

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The 5th wheel plate weighed in at 1020 pounds. According to the TM it should have been 980. I'm not sure where the extra 40 pounds came from.

The M1088, after 5th wheel plate removal, with auxiliary transmission cooler still attached, was 17,020 pounds. I don't have a weight following the removal of that auxiliary cooler, but the cooler probably weighed 200 pounds, so we're about 16,800, I'm thinking.

Driving it 8 miles round trip today to the scrap yard was interesting. It's the longest drive I've done yet and everything seems to be working OK. I've got some air leaks I need to fix, but the air stayed near 120 PSI for the entire trip,

And the CTIS is working great, using the Christian Platzer CTIS controller. The CTIS is the big reason I wanted one of these trucks, 4x4 or 6x6, instead of a Unimog or other Mercedes chassis. The Mercedes would be more plush, but I want to get out on the sand and manually airing big tires down and up again doesn't appeal
 
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dwlindsey

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dwlindsey said:
The auxiliary transmission cooler came off today. The plumbing seems to have been transmission to primary cooler, primary cooler to valve (thermostat valve?) then back to transmission. The valve has an output to the auxiliary cooler and and return from the Auxiliary cooler. I guess you would call that a secondary loop through the auxiliary cooler.

So it seems to me that when the oil is hot, it's diverted into the auxiliary cooler, back through the valve and back to the transmission.

So what I did today is to cap the ports on that valve that went to and from the auxiliary cooler. With those hoses off, we unbolted the auxiliary cooler and removed it.

If I'm right, with those ports in the valve that went to and from the auxiliary cooler capped off, there should be a loop - transmission to primary cooler, then primary cooler to valve, then valve to transmission. It should work fine. Can someone confirm or deny?

My plan is to get a new hose ASAP to do the return from primary cooler to transmission, which will eliminate the valve (thermostat valve?).

I don't plan to drive it far until I get the new hose, just in and out of the garage, because I can't raise the cab in the garage. Am I OK for short drives of 30 feet, until I get the new hose?
Click to expand...
OK, I've figured it out. Nate Volk did an auxiliary transmission cooler delete on his M1088

It's apparent that he took the return hose off of the valve (thermostat valve?) and connected that hose to the elbow that's now on the transmission "to cooler" port. He didn't get a new hose, just re-routed the existing hose.

I'm going to do exactly that. Thanks Nate! Your video was very helpful.

 
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Ronmar

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the thermostatic valve only routes oil to the aux cooler when the temps returning from the primary cooler are warm enough to warrant it. yes, take that thermostat valve out of the system completely with only the transmission to-from ports connecting forward to the primary cooler...
 
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dwlindsey

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I'm making some progress. The fifth wheel plate is off, the auxiliar transmission cooler is off, the work platforms are off and I've painted more on the frame.

I also tracked down and fixed a couple of air leaks today.

Here's the latest picture.

truck after painting the rear frame.jpg

I'll be out of town for a couple of weeks starting tomorrow, I'll start on replacing the air cleaner and getting some primer on the cab in late August or early September
 
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