Skip to main content ↑ ↓
Topic: Air line electrical switches (Read 418 times) previous topic - next topic

Air line electrical switches

Working in and around our leaking steering gear found two air line switches that I was not aware were located there.

We know about the two air brake light switches mounted on forward upper panel in streetside forward bay.

Anyone know about these newly discovered switches located in this bundle ?

Based upon how they are wired, a single circuit is activated based on either front or rear air lines reaching set point.

 

Re: Air line electrical switches

Reply #1 –
If they are not brake light switches then they are probably "low air pressure switches".

On my air system diagram, they are shown "T"ed into the air lines going from the treadle valve to the dash air pressure gauge.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Air line electrical switches

Reply #2 –
This is the answer I got from Rick when I asked the same question a few months back.
jor

Quote
These pressures switches will set off the dash alarm when pressure is below 50 lbs. Watch for corrosion I have had the cap separate from the body and open the air line.
93 225
95 300
97 270
99 320

Re: Air line electrical switches

Reply #3 –
can they have anything to do with the retarder??

Pat
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653
 

Re: Air line electrical switches

Reply #4 –
Usually the retarder switches 3 of them are under the dash or tucked behind a kick panel.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins