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Old 05-15-2014, 05:20 PM   #15
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there are some nice 12vdc units out there my setup is 8CMF at 200 psi

i am using the 5g air tank on the RV for the air brakes to hold the air
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Old 05-16-2014, 11:35 AM   #16
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Terry, are you running those through a drier?

I've been thinking about airing up my on board tanks from my pancake, but was concerned about moisture getting in to the system.

I want to do it so I don't have to let the engine run so long before leaving.
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Old 05-16-2014, 04:33 PM   #17
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Quote:
Originally Posted by MSHappyCampers View Post
Bob, just curious as to why you don't use the on-board compressor?
The onboard compressor usually cycles between about 90 and 120 psi. If you need 105 psi or better in any tire, it can get tricky trying to tap dance with the o/b cycles.
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Old 05-16-2014, 06:27 PM   #18
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It's what I carry also. Very nice unit!
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Old 05-16-2014, 06:53 PM   #19
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Terry, are you running those through a drier?

I've been thinking about airing up my on board tanks from my pancake, but was concerned about moisture getting in to the system.

I want to do it so I don't have to let the engine run so long before leaving.
I never understood the "running so long" statements. My coach will increase air pressure from 50 to 125 psi in 4 minutes, the air suspension is back up then and I'm ready to pull out.
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Old 05-16-2014, 08:21 PM   #20
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Air Compressor

Quote:
Originally Posted by JFXG View Post
The onboard compressor usually cycles between about 90 and 120 psi. If you need 105 psi or better in any tire, it can get tricky trying to tap dance with the o/b cycles.
The RV Geeks have an updated solution to help with this issue.
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Their update is to add a second T in the supply line and add a ball valve so that you can bleed off air and force the compressor to cycle when needed while airing up tires.
This air fill tool is before adding the second T and valve. See their video update for the improvement.
Paul
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Old 05-16-2014, 08:42 PM   #21
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Originally Posted by PDR John View Post
Terry, are you running those through a drier?

I've been thinking about airing up my on board tanks from my pancake, but was concerned about moisture getting in to the system.

I want to do it so I don't have to let the engine run so long before leaving.

yes it is running through the RVs drier

there are 3 timers 1 to keep the system off when starting the RV
timer 2 off set the load so not all the pumps come on at the same time
timer 3 there is a 12vdc air valve that is T,,ed off to the water dump valve on the drier

this timer is 0.5 sec and works and sounds just like if your RV was running and blows the water out of the drier for you

i have a video of the system

but yes i do the same thing with it and air up the RV be for i pull out and tires air tools

8 CFM is alot of air from just a small 12v system

on the rv motor driven pump is a 14 CFM unit that is if its the bendix tu-flo 550
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Old 05-16-2014, 09:02 PM   #22
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Originally Posted by terry735001 View Post
yes it is running through the drier

there are 3 timers 1 to keep the system off when starting the RV
timer 2 off set the load so not all the pumps come on at the same time
timer 3 there is a 12vcd air valve that is T,,ed off to the water dump valve on the drier

this timer is 0.5 sec and works and sounds just like if your RV was running

i have a video of the and i think how it works

but yes i do the same thing with it and air up the RV befor pull out and tires

every time they come on
sorry i did not have a newer pic showing the drier valve
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Old 05-16-2014, 09:22 PM   #23
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Originally Posted by Ray,IN View Post
I never understood the "running so long" statements. My coach will increase air pressure from 50 to 125 psi in 4 minutes, the air suspension is back up then and I'm ready to pull out.
after looking up your
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA

and looking at pics of the motor installed in your unit it looks like your air pump is 3 sizes higher ..... i am guessing here ....

if i am looking at the right unit and pics your adds up to the upper bendix 750 units at 20 to 24 CFM ...all most 2 times the air of a 14 CFM units

if your time is 3 to 5 mins we are 10
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Old 05-16-2014, 10:03 PM   #24
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The RV Geeks have an updated solution...... add a second T in the supply line and add a ball valve..... force the compressor to cycle.....
Paul.... Thanks, I saw these threads months ago. Frankly, I don't see the point. Unless your game is the fun of the design (which is ok), after you're done with the fittings you still have to tap dance with the onboard compressor. My objective is to air the tires that need 110-115psi. I went to HF, bought a nice little 150psi 110V compressor that does the job nicely without playing games, fits in a belly bay, and comes in handy from time to time on other projects. Hundred bucks. Problem solved. Easy beans.
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Old 05-17-2014, 08:51 AM   #25
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Terry- Thank you for the follow up photos. Do you have any links to where you purchased all the parts?





Quote:
Originally Posted by Ray,IN View Post
I never understood the "running so long" statements. My coach will increase air pressure from 50 to 125 psi in 4 minutes, the air suspension is back up then and I'm ready to pull out.
It's really a 2 part reason: Yes 4-5 mins is not that long, longer time if tanks are 0. However at 6 am parked next to a popup, 5 min is an eternity to people trying to sleep.

I try not to be that guy.

SECOND- Boondocking air. I already have 8 house batteries, why not tie into them for air? It's not like 1 or 2 of those compressors running for 10 mins will do anything to my power supply. However, firing up my genny or main engine just to adjust a tires pressure is silly.
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Old 05-18-2014, 09:16 AM   #26
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My problem is none of my storage compartments are big enough to fit a compressor in.
I suppose I could store it in the trunk of the toad, but what to do if we don't have the toad?
Any Ideas?
Thanks Tim
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Old 05-18-2014, 12:28 PM   #27
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I like the Porter Cable 120V 4 Gal pancake oil-free compressor Model C2004-WK which I have been using for the past few years with great success. My MH tires require 120 lbs pressure which this relatively quiet compact unit handles without difficulty. The compressor features a cut-out max pressure of 165 PSI and a cut-in startup pressure of 135 PSI. It weighs approximately 30 lbs and is easily stored in a basement compartment. It comes with a 25' x 1/4" hose which I replaced with a higher quality 50' x 1/4" coiled hose for utility and convenience.

Once pressurized, I can quickly check and top-up my 6 coach tires (or the toad) as required, usually with the pump cutting in perhaps once if at all. Here is a link for more details on this unit:

http://www.portercable.com/products/...roductID=16710
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Old 05-18-2014, 02:24 PM   #28
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I was looking at this one...

VIAIR Corporation - 400P-RV Automatic Portable Compressor (P/N 40047)

Seems almost perfect.
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