So I got the parts and set this up. I used the Trailer emergency line.
I get some air, but only if I run the truck at high idle and she reached 120psi cut out. One it falls below that, I begin to have issues airing up tires.
I look at the dash and the tanks are at 90psi, which explains why I can't air up my 100psi tires.
What am I missing here?![]()
Wipers and Tires
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Hanadarko, Jul 16, 2010.
Page 2 of 3
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
I use that same hose you speak of and sometimes it takes a few build up cycles of the compresor in order to fill a tire to 100 psi. Even when the tire is at 90 to begin with.
-
Tire pressure varies by tire manufacturer. On my Toyos I run 105# in the summer for mileage, 95# in winter for better traction. Tire wear is an indicater of proper pressure. Abnormal wear in the middle = pressure too high, abnormal wear at edges = pressure too low. Using truck air for inflating tires is not a good idea. You are putting water and oil from your air system into your tires which causes rotting. If you are determined to do this drain your air tanks several times before inflating your tires.
-
Use a filter/water separator, like the kind meant for automotive spray painting, inline with the hose. If you don't want to attach it permanently, you can vise grip it to the frame when needed. Add some Litter Pearls (silica gel cat litter) to the bowl for extra dry air.
Alternatively, Harbor Freight sells a disposable inline filter/dessicant for about $8.
On this same note, I once picked up a trailer with a Meritor air system on it. When I drained the tank on the trailer, I got about a 5 gallons of oil/water mix... mostly oil. Those tires were screwed.Native Dancer Thanks this. -
Well my Makita HOT DOG compressor claims it should sustain 130psi.
I cant get more than 100 out of it. Maybe Its time to take a screwdriver to it...
good point with water/oil in the air line....sheesh. -
Constant compresser output is related to the size of your tank. With a small tank it is hard for the compressor to keep up, a large tank gives you a reserve to work from.
-
What do you think you are doing with "shop" air? The air system on my truck is cleaner as it should be you dont want oil in with you brake chambers.
-
Maybe put a quick connect on one of the unused plugs on an air tank and get the air straight from the teet. Seems I've had a little better results that way than using the red hose.
Hanadarko Thanks this. -
This idea had come to mind too. Its a good one.
-
try reading what's on the side of the tire....

Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 2 of 3