I have one of these. (Leak detector) Best investment ever! You can hear a tiny refrigerant leak on a reefer unit while standing at the rear of the semi-trailer. I've used it to find a water leak in a semi-trailer roof by going inside the trailer and having a co-worker blow compressed air across the roof of the trailer. I've also used it to find a water leak on a window in my home. It would only leak when there was a strong wind coming from the west. I purchased it & used it for most of the time for conducting safety inspections on trucks & buses,
I purchased a large refill bottle of bubble making liquid (the product used by kids to make bubbles) from the local $2 shop. It is a much cheaper option than the commercial product.
Don't forget behind the instrument panel, as there are two connections to the display unit showing air pressure, and connections to the top right switch (2x4, 4x4 selector)
The Ex ADF U1700 does not have air dryer as standard, so unlikely he has one. Stewie 110 might want to look at my recent post re U1700 air leak. I eventually found that the main unloader/regulator was leaking to atmosphere all the time due to some swarf inside.
You are very fortunate that you can hear the air escaping. Shut the Mog off in a quiet place and take your time. The bubble spray bottle works excellent, but don't discount the value of some quality time with your ear hovering over the lines. Neighbors may get a chuckle. I recently developed a leak in pressure when the U1300 was parked for more than 30 minutes and rolled up my sleeves in anticipation of a major head cramp. I found it within a minute - a banjo fitting had come loose from vibration. A quick snug with the wrenches and totally remedied. I have the advantage of the box being off the truck presently so everything is easy access from the top.
Just thought I would share my efforts replacing the exhaust from the manifold to the tailpipe. The Unimog I am working on is my 1968 Swiss Radio Command truck. I am using a complete exhaust kit from Scott that I bought around three years ago.
I started by trying to undo the bolts from the...
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