MB 1120 Coming to America! Purchase, Build and Now Travel!

VerMonsterRV

Gotta Be Nuts
I really like seeing the macaws. We've seen a few different kinds so far, but haven't yet seen the all blue ones.
PXL_20230820_122715680.jpg

And the truck had issues again. We decided to head to an island that is mostly park and walk some beaches. In the morning before we went to this parking lot Heather saw a spark when I started the truck. We drove the 1km to this parking lot, stopped and went to the island for the day. When we returned in the afternoon I tilted the cab to see if I could find what was wrong.

I found that a small cap on the end of the starter was hanging by 1 screw, the second screw was gone. Plus a U shaped washer seemed to be jammed. I emailed Stafan (this guy is literally a walking encyclopedia for Mercedes trucks) asking about this and he confirmed that this washer aligns the shaft to the brushes (with a very nice hand drawn diagram of how it works), and the cap holds the washer in place. Given it had jammed in there, and there is very limited space I was working on trying to get the U shaped washer out. And that's when all the "help" started to show up. Very kind of them, but honestly it pretty much stopped all progress as I had to translate everything into Portuguese, which brushes doesn't translate well. After figuring out they call them carbons they started to understand. But not until it was dark. So, I thanked them and told them I was going to stop for the night and that they could go. I think they were glad to be able to go back home. The next morning I got out early before they all showed up and had it all back together and the truck started right up.
PXL_20230904_205808477.jpg

The offending washer without the cap. Luckily I had a couple of metric screws that were the correct size so I could put the cap/retainer back in place.
PXL_20230904_185716719.jpg

Now I do carry a spare starter with us. But to replace it there is a fair amount of disassembly needed to be able to get to it (turbo and dump pipe). I don't have spare bolts and studs for those, yet. I will be getting some.

Well, that's enough for now. More to come.
 

Geo.Lander

Well-known member
I really like seeing the macaws. We've seen a few different kinds so far, but haven't yet seen the all blue ones.
View attachment 795281

And the truck had issues again. We decided to head to an island that is mostly park and walk some beaches. In the morning before we went to this parking lot Heather saw a spark when I started the truck. We drove the 1km to this parking lot, stopped and went to the island for the day. When we returned in the afternoon I tilted the cab to see if I could find what was wrong.

I found that a small cap on the end of the starter was hanging by 1 screw, the second screw was gone. Plus a U shaped washer seemed to be jammed. I emailed Stafan (this guy is literally a walking encyclopedia for Mercedes trucks) asking about this and he confirmed that this washer aligns the shaft to the brushes (with a very nice hand drawn diagram of how it works), and the cap holds the washer in place. Given it had jammed in there, and there is very limited space I was working on trying to get the U shaped washer out. And that's when all the "help" started to show up. Very kind of them, but honestly it pretty much stopped all progress as I had to translate everything into Portuguese, which brushes doesn't translate well. After figuring out they call them carbons they started to understand. But not until it was dark. So, I thanked them and told them I was going to stop for the night and that they could go. I think they were glad to be able to go back home. The next morning I got out early before they all showed up and had it all back together and the truck started right up.
View attachment 795282

The offending washer without the cap. Luckily I had a couple of metric screws that were the correct size so I could put the cap/retainer back in place.
View attachment 795283

Now I do carry a spare starter with us. But to replace it there is a fair amount of disassembly needed to be able to get to it (turbo and dump pipe). I don't have spare bolts and studs for those, yet. I will be getting some.

Well, that's enough for now. More to come.

I thought these MB trucks were supposed to be super reliable? Or was that super repairable? ;)
 

VerMonsterRV

Gotta Be Nuts
One of the draw backs off on the road repairs with an interesting vehicle that draws attention. Glad you got it figured out! Reminds me that I wanted to pick up a spare starter to carry on the road.
Add an alternator and water pump to your list. Oh yeah, we seem to be going through a bit of a rough patch. We're broken again. This time the front brakes seem to randomly start to drag. I think it is something with the air system, bug I'm still trying to figure things out.
 

VerMonsterRV

Gotta Be Nuts
Well, now that I am pretty confident in the repairs to our brakes I can tell you all about it. Our truck the optional 4 wheel parking brake. While the rear parking brakes works like all the other trucks, utilizing a spring, the fronts are air only. How this is achieved is there is a "shuttle valve" in the brake line. When you use the service brake, the shuttle is on one side, the parking brake the other. Well it seems our shuttle was either sticking or leaking. While driving the front air parking brake would ever so slowly apply. We noticed the truck feeling a bit sluggish and when we stopped we could smell the brakes. Upon checking the front drums were hot. While trying to figure out what was wrong, 2 local guys pulled up and told me they were mechanics. In the drizzle they helped trouble shoot, including jacking up the front of the truck to check the front brakes. We hoped (yeah right) it was a one time problem (when has that ever happened?) and decided to let things cool off and drive on. Well soon enough we realized it was still happening. By stopping and setting/unsetting the parking brake "fixed" the problem. So we limped back to town and camped for the night to try and think through our options. This town wasn't very big and we were about 90km from a smallish city.
IMG-20230915-WA0001.jpg
These guys jumped right in to try and help.
IMG-20230915-WA0006.jpg

The next morning we carefully drove 1.8km to the only truck mechanic in town in hopes at least to find parts if needed. Once again these guys literally attacked our problem, dropping what they were working on. Within minutes the front of the truck was jacked up and 3-4 guys were looking for the problem. Part of the problem though is we do not know Portuguese and letting these guys know that I was pretty sure it has something to do with the front parking brake was tricky, partly due to the fact that none of the trucks here have front parking brakes. Luckily for us, they had a cousin who knew English. They called him up and he came right over and spent most of the day with us, not only handling the translation but getting to know each other. He has been to the USA and hopes to move there with his girlfriend, and I hope they can. This area is the apple growing area for Brazil, so he left for a few minutes and came back with apple gift packs for us.
IMG-20230915-WA0005.jpgPXL_20230914_172242635.jpg
Now the amazing part, after saying that the best they could do was to entirely disable the front brakes and we could then drive the 90km to the city, they came up with a shuttle valve! It's not a Mercedes part and I have no idea as to which truck it was supposed to fit, but they got it installed and we are off! All in all it was a good experience!
 

Wazak

Member
I still have in one of my old tool boxes some coins and pop rivets that I used to use when diagnosing air system leaks when I was a mobile service engineer working on heavy earth moving equipment. As a get you home they can be temporarily used to block off a leaking air line.
If you suspect a leak to a brake cylinder actuator try working backwards from the brake to trace the source of the leak.
 

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