These Thomas pumps for the microphor toilet

[luckyron1]

We're now on our 4th one. The last two we got directly from Thomas
instead of BB. Now #4 sounds like it's going. I drain it about once
every two weeks. What causes them to give out?

Ron & Ruth in 2000 LXI in Port Aransas

[Leroy Eckert]

The first thing to know is how often it cycles. I can barely hear mine. It should not cycle constantly. If it is find the air leak and stop it. My pump cycles every 6-7 hours without use which means I have a small air leak somewhere most likely in the toilet itself.. The Thomas pump can be rebuilt for about $70 in parts. Parts include an O ring head seal, two little metal flapper valves, a piston sleeve and the pump piston itself. When you look at the inside you wonder how the thing could work at all but the piston material(don't know what it is)is tough as nails and runs dry. Rebuild time is about 30 minutes. Leroy Eckert 1990 WB-40 Smoke N Mirrors Dahlonega, GA Royale Conversion --- On Fri, 11/21/08, luckyron1 wrote: From: luckyron1 Subject: [WanderlodgeForum] These Thomas pumps for the microphor toilet To: WanderlodgeForum@yahoogroups.com Date: Friday, November 21, 2008, 6:05 AM We're now on our 4th one. The last two we got directly from Thomas instead of BB. Now #4 sounds like it's going. I drain it about once every two weeks. What causes them to give out? Ron & Ruth in 2000 LXI in Port Aransas

[g_man1146]

Ron & Ruth,

The Thomas 12VDC compressor in my bus is set only run when there is
no shore power for the 120VAC compressor. This is done by adjusting
the ON?OFF pressure switches cut in and cut out points so they won't
trigger the small compressor when the large one has power. Another
problem that sometimes effects the Thomas compressor is a faulty
check valve somewhere in the system that allows the Thomas compressor
to loose pressure into other parts of the air system such as the
suspension etc.
When you drain water from the Thomas compressor's small tank, be sure
to have the compressor running. Otherwise water trapped in the
compressor itself and in the lines going to it will not drain. A
change in the sound it makes running is a sure way to tell there is
water in the system. After replacing a couple of check valves mine
will hold for weeks of non-use without loosing air. (I shut it off,
check the guage and check back weeks later.) It only cycles after
several Microphor flushes. BTW, the regulator inside the Microphor is
a known source of leaks. I removed mine and put another regulator for
the toilet down by the air pressure switches. Now both systems have
air regulators with guages making setting the cut in and out
pressures easier.

Rich D. '99LXi43' CT


--- In WanderlodgeForum@yahoogroups.com, "luckyron1"
wrote:
>
> We're now on our 4th one. The last two we got directly from Thomas
> instead of BB. Now #4 sounds like it's going. I drain it about once
> every two weeks. What causes them to give out?
>
> Ron & Ruth in 2000 LXI in Port Aransas
>

[luckyron1]

Thanks for the replies guys. As near as I can tell it's not an air
leak issue. I didn't know that the 120 vt compressor had anything to
do with it and I've never heard the 120 vt compressor kick in after
flushing the toilet, only the Thomas 12 vt. The 12 vt. Thomas pump
rarely runs outside of flushing the toilet. It'll typically run after
the 2nd or third flush for about 40 seconds. G'man speaks of a switch
to turn it on/off, an adjustable cut-in switch? Exactly where is it?

Ron & Ruth in 2000 LXI

--- In WanderlodgeForum@yahoogroups.com, "luckyron1"
wrote:
>
> We're now on our 4th one. The last two we got directly from Thomas
> instead of BB. Now #4 sounds like it's going. I drain it about once
> every two weeks. What causes them to give out?
>
> Ron & Ruth in 2000 LXI in Port Aransas
>