Built a tire inflator to use with the coaches onboard compressor, no need to carry a separate compressor anymore. This will work on any coach with an air compressor. My compressor will develop 130 psi which is more than enough for the 110 psi i run in the front tires.
I was able to top off the rear duals in one compressor cycle. Bleed the system below 90 psi and topped off the front tires. It took about 10 minutes total, then another 10 minutes experimenting with different lock on air chucks.
Total cost $71.00 not including the digital tire inflator, I had it laying around the garage. I think it was $60.00 when I bought it from Snap-On. You can buy a nice inflator for under $30.00.
Stores in less space than the pancake compressor did no where near the weight of a compressor.
1) I start with an air filter connected to the coaches air outlet,
2) then 50' of 1/4" poly hose (very small when rolled up),
3) then to an in-line bleeder valve (not pictured), this allows me to bleed the system below 90 psi to cause the compressor to kick on if needed. This is simpler than having the DW pump the breaks to bleed the system down. THis is necessary if the system pressure falls below desired tire pressure. If this happens the tire with greater pressure will back flow to the compressor, causing the tire to lose pressure
4) then to a pressure gauge that allows me to monitor the coaches air pressure, I watch this gauge to let me know when there is sufficient pressure to inflate the tire,
5) digital tire inflator,
6) then 2nd inline bleeder (not pictured), this allows me to let air out of the tire should I miss my mark and over inflate,
7) 12' of lead to allow me to stand a safe distance 12' back along side the coach,
8) swivel, so when I am 12' away the pull on the hose turns 90 degrees to reduce strain on the lock on air chuck,
9) lock on air chuck with open check, an open check is important as it allows air in the tire to flow back to the inflator gauge to produce a tire pressure reading.
Here os the video link where I got the idea