HWH Jack problems

[ronmarabito2002]

Don: If I remember correctly, there are two solenoids on that pump.
I would check the connections good. The pump motor is built in Europe
and is almost bullet proof, but a few years back, a wire broke loose
inside the motor and it quit. My starter/alternator shop repaired it.
Brushes were still perfect.

R.E. (Ron) Marabito, Dallas, TX 92WB40

--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> During our recent cross-country trip we had problems with our jack
motor or pump that at this point is not precisely diagnosed, and I'm
hoping someone has experienced similar issues.
>
> When the motor is first started, either in automatic mode, or by
manually extending a jack, it runs slow and appears to be laboring. It
also osciallates somewhat in speed. It is drawing 60-70 amps at that
point.
>
> Generally, after it has run awhile, it will "kick-in" to high speed,
drawing about 80 amps and will run fine to completion. Not uncommonly,
but not always, it will do that after it has stopped and restarted,
either manually, or because the low jack has completed and it is
running the remainder down. Sometimes the speed never increases, and
in those cases the run-time will usually expire before the jacks are
all extended, and another run will be required.
>
> Coincidentally, this behavior started the day after we passed
through Moscow, IA
>
> While over Randy's pit in Florida we ran the jacks several times
while he checked for loose ground or hot wire, and nothing was
detected. He tried calling HWH support, but did not get a callback.
>
> Fluid levels are fine; I had checked, and Randy re-checked.
>
> Towards the end of our trip the problem got worse. The new symptom
was that the relays would kick, but the motor would not start.
Repeated clicking of a manual lever would eventually result in the
motor starting. It did this for three consecutive uses, then for the
last two including when we arrived home it did operate on first
switching. When the relays kicked and the motor failed to start, power
draw was under 20 amps, around what would be expected for solenoids
and valves - the motor was not apparently drawing any current.
>
> What are your thoughts?
>
> Don Bradner
> 90 PT40 "Blue Thunder"
> Home in Eureka, CA
> My location: http://www.bbirdmaps.com/user2.cfm?user=1
>