FLU-419 assistance needed

[guns1977]

I purchased a FLU419 and drove it home 65 miles @40mph. everything is good on the machine but the lights didn't work, well after getting the headlight, turn signals, hazards lights working the oil pressure gauge is not working, it did before I started, the coolant temp is working, when I cut the switch on the gauge moves (powers up) but does not read the oil pressure, I was using it the other day and it started working then stopped, all the electrical wiring on it I don't know where to start. I already went thru the fuze panel again and made sure I was getting power thru the fuzes and good contact now I'm stumped? Any ideas?
Thanks

 

[tennmogger]

Welcome. The only disease worse than the green machine disease is the Unimog disease.

The intermittent is probably the oil pressure sensor. It's easy to check. On the OM-352 engine the oil pressure sensor is along the left side (drivers side) of the engine block, about halfway back. It's below the dipstick for the power steering fluid and in front of the starter. Sit in the drivers seat with the doghouse cover off and you can see and reach it.

From the screw contact on the end of the sensor measure the resistance to ground (the block) and see it's about 20 Ohms. You will probably find much higher than that if the sensor is bad. Occasionally the sensor threads lose electrical contact with the block due to sealant, so use an open end wrench and tighten the sensor, screwing and unscrewing to make electrical contact. Check resistance again. If still much higher than 20 Ohms then the sensor is probably bad. I'd suggest removing it completely and cleaning the contacts, then check it again wit the meter.

Have you joined the online Unimog groups? Lots to learn there. Look up Benzworld/Unimog at http://www.benzworld.org/forums/unimog/

and the Moglist at http://www.tx4x4.com/index.php?page=uml

One source of the oil pressure sensor is http://www.expedition-imports.com/

Another source: http://www.eurotruck-importers.com/,

And http://www.eurotech-services.com/index.html

You can also go to Rocky Mountain Moggers webpage, check the links for other vendors: http://www.rockymountainmoggers.com/links.html

Bob

(I do not have an FLU-419 but many systems are the same as a 406 Unimog when you are searching for stuff.)

 

[guns1977]

Thanks for the info i will check it out. Yeah i got too many disease......lol, my wife said WTF is that? Lol got to keep her guessn

 

[kelwar]

Try cleaning all the fuses and making sure they have a good connection those fuses are notorious for corroding a little bit an causing problems.

 

[guns1977]

Try cleaning all the fuses and making sure they have a good connection those fuses are notorious for corroding a little bit an causing problems.

Thanks, i did that first, i worked on duetz tractors that had the same fuzes and you learn that pretty quick. I ohmed out the sender and it was bad, got it out and one of the lugs was turning in the sender so i guess i will get a new sender.

 

[Karl kostman]

Listen to what tennmogger says he certainly know a LOT about the Unimogs! He has helped me on many occasions!
Karl

 

[guns1977]

Listen to what tennmogger says he certainly know a LOT about the Unimogs! He has helped me on many occasions!
Karl

I did, everything was where he said it was, and test showed exactly what he said on good or bad. I rather stay around here with the question instead of going to another site, kinda used to this group....

 

[kelwar]

Thanks, i did that first, i worked on duetz tractors that had the same fuzes and you learn that pretty quick. I ohmed out the sender and it was bad, got it out and one of the lugs was turning in the sender so i guess I will get a new sender.

Funny you said that as that was my first experience with those fuses in my fathers old duetz....

 

[pat356jones]

Welcome. The only disease worse than the green machine disease is the Unimog disease.

The intermittent is probably the oil pressure sensor. It's easy to check. On the OM-352 engine the oil pressure sensor is along the left side (drivers side) of the engine block, about halfway back. It's below the dipstick for the power steering fluid and in front of the starter. Sit in the drivers seat with the doghouse cover off and you can see and reach it.

From the screw contact on the end of the sensor measure the resistance to ground (the block) and see it's about 20 Ohms. You will probably find much higher than that if the sensor is bad. Occasionally the sensor threads lose electrical contact with the block due to sealant, so use an open end wrench and tighten the sensor, screwing and unscrewing to make electrical contact. Check resistance again. If still much higher than 20 Ohms then the sensor is probably bad. I'd suggest removing it completely and cleaning the contacts, then check it again wit the meter.

Have you joined the online Unimog groups? Lots to learn there. Look up Benzworld/Unimog at http://www.benzworld.org/forums/unimog/

and the Moglist at http://www.tx4x4.com/index.php?page=uml

One source of the oil pressure sensor is http://www.expedition-imports.com/

Another source: http://www.eurotruck-importers.com/,

And http://www.eurotech-services.com/index.html

You can also go to Rocky Mountain Moggers webpage, check the links for other vendors: http://www.rockymountainmoggers.com/links.html

Bob

(I do not have an FLU-419 but many systems are the same as a 406 Unimog when you are searching for stuff.)

Sorry for asking here but I'm a new Unimog FLU419 owner and I'm new to this website and don't see how to post a new question. Can anyone tell me how to check the power steering fluid in a FLU419? Mine screeches a little when you turn the steering wheel. And I don't know how to check the oil. Thanks!

 

[The FLU farm]

Pull the doghouse and you'll see the P/S reservoir.
But most likely it's a loose belt that creates the noise.

 

[pat356jones]

Pull the doghouse and you'll see the P/S reservoir.
But most likely it's a loose belt that creates the noise.

Thanks! I assume there is a way to tighten the belt. right?

 

[The FLU farm]

It's no fun, but yes, it's adjustable.
Replacing all three is even less fun, but if you do that they should be good for a while.

 

[Migginsbros]

Pat, have a look at the TM s in the TM section, Misc. TM s. Uploaded from Guyfang. Greetings from overseas.

 

[pat356jones]

It's no fun, but yes, it's adjustable.
Replacing all three is even less fun, but if you do that they should be good for a while.

Thanks!