Hissing of air in front

[Bob Lawrence]

Hi group,
One of our PNW bird guys has a air hissing problem. It seems that when
he pushes in the emergency valve, a black hose on the drivers side that
hangs down hisses air. When the valve is pulled, the air leak stops.
What can I tell him that might be the cause?
He has an 87 PT40.
Also he has been told his HWH pump is shot and will cost approx 4k to
make a new one (per his conversation with HWH). Any other source for
this? He wants to get new if possible.
Thanks for your help.

Bob Lawrence
84 PT36
Tacoma, Wa.

[Stephen Birtles]

Replace the valve about twenty dollars
Cant help with the pump
Stephen 77fc35



--- In WanderlodgeForum@yahoogroups.com, "Bob Lawrence"
wrote:
>
> Hi group,
> One of our PNW bird guys has a air hissing problem. It seems that when
> he pushes in the emergency valve, a black hose on the drivers side that
> hangs down hisses air. When the valve is pulled, the air leak stops.
> What can I tell him that might be the cause?
> He has an 87 PT40.
> Also he has been told his HWH pump is shot and will cost approx 4k to
> make a new one (per his conversation with HWH). Any other source for
> this? He wants to get new if possible.
> Thanks for your help.
>
> Bob Lawrence
> 84 PT36
> Tacoma, Wa.
>

[Ralph L. Fullenwider]

Hi Bob:

If you mean the spring break valve, sounds like it is by passing and needs
to be replaced. As to the pump motor, with out a refit, I would have the
original rebuilt. That is what I am going to do with mine.

Safe travels,

Ralph and Charolette Fullenwider
84FC35
Duncan, Oklahoma

At 02:51 AM 6/1/2007 +0000, you wrote:
>Hi group,
>One of our PNW bird guys has a air hissing problem. It seems that when
>he pushes in the emergency valve, a black hose on the drivers side that
>hangs down hisses air. When the valve is pulled, the air leak stops.
>What can I tell him that might be the cause?
>He has an 87 PT40.
>Also he has been told his HWH pump is shot and will cost approx 4k to
>make a new one (per his conversation with HWH). Any other source for
>this? He wants to get new if possible.
>Thanks for your help.
>
>Bob Lawrence
>84 PT36
>Tacoma, Wa.
>
>

[Gregory OConnor]

Bob, The 'spring brake' 'parking brake' that the valve control feed
a blatter that requires air to pull the brake shoe off the drum.
park brake is passivly on and needs dynamic attention (compressed air)
to release. if there is a hissing noise (like KenS TexasMike and
Jim's post)it could be that the blatter is leaking and the air to
release is constantly being pushed through the valve to try and
maintain the release of the brake?????? Often when a brake release
line or blatter is leaking you can hear air rush through this valve.
the other possibility is ;the port in the valve that exhaust the air
that was trapped holding the brake shoe off the drum is stuck open
with debris. You may want to check that the air dryer is working as
that could cause probs like stuck valves and ports.

I would bench the hwh pump, and send it off to a good hydryloic shop.
it is nothing more than a electric motor driven hydrolic pump much
like the units that power lift gates on delivery trucks. Low battery
use of any electric pump will eat up the motor ( bad grounds and
undersized wire will do the same damage). when the motor gets
compramised the failure is expotential and the battery requirement to
run gets larger. the pump does not get hurt by a weak battery and or
screwed up motor. I bet the e-motor is less than $300. to rebuild and
the pump woud be less than $600. ( no need to rebuild unless the pump
was the cause of e motor failure or slow run).

GregoryO'Connor
94ptRomolandCa


--- In WanderlodgeForum@yahoogroups.com, "Stephen Birtles"
wrote:
>
> Replace the valve about twenty dollars
> Cant help with the pump
> Stephen 77fc35
>
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Bob Lawrence"
> wrote:
> >
> > Hi group,
> > One of our PNW bird guys has a air hissing problem. It seems that
when
> > he pushes in the emergency valve, a black hose on the drivers
side that
> > hangs down hisses air. When the valve is pulled, the air leak
stops.
> > What can I tell him that might be the cause?
> > He has an 87 PT40.
> > Also he has been told his HWH pump is shot and will cost approx
4k to
> > make a new one (per his conversation with HWH). Any other source
for
> > this? He wants to get new if possible.
> > Thanks for your help.
> >
> > Bob Lawrence
> > 84 PT36
> > Tacoma, Wa.
> >
>

[Bob Lawrence]

Thanks, Ralph,
I thought it might be the valve, but wanted to hear from the expert.
Bob Lawrence
84 84 PT36
Tacoma, Wa.

--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
>
> Hi Bob:
>
> If you mean the spring break valve, sounds like it is by passing
and needs
> to be replaced. As to the pump motor, with out a refit, I would
have the
> original rebuilt. That is what I am going to do with mine.
>
> Safe travels,
>
> Ralph and Charolette Fullenwider
> 84FC35
> Duncan, Oklahoma
>
> At 02:51 AM 6/1/2007 +0000, you wrote:
> >Hi group,
> >One of our PNW bird guys has a air hissing problem. It seems that
when
> >he pushes in the emergency valve, a black hose on the drivers side
that
> >hangs down hisses air. When the valve is pulled, the air leak
stops.
> >What can I tell him that might be the cause?
> >He has an 87 PT40.
> >Also he has been told his HWH pump is shot and will cost approx 4k
to
> >make a new one (per his conversation with HWH). Any other source
for
> >this? He wants to get new if possible.
> >Thanks for your help.
> >
> >Bob Lawrence
> >84 PT36
> >Tacoma, Wa.
> >
> >
>

[Bob Lawrence]

Thanks Greg,
The prices you quoted are a LOT more reasonable than the 4k HWH wants
to retool.
I'll pass on yours and Ralph recommendations.
Thanks again.
Bob Lawrence
84 PT36
Tacoma, Wa.
--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
wrote:
>
> Bob, The 'spring brake' 'parking brake' that the valve control
feed
> a blatter that requires air to pull the brake shoe off the drum.
> park brake is passivly on and needs dynamic attention (compressed
air)
> to release. if there is a hissing noise (like KenS TexasMike and
> Jim's post)it could be that the blatter is leaking and the air to
> release is constantly being pushed through the valve to try and
> maintain the release of the brake?????? Often when a brake release
> line or blatter is leaking you can hear air rush through this
valve.
> the other possibility is ;the port in the valve that exhaust the
air
> that was trapped holding the brake shoe off the drum is stuck open
> with debris. You may want to check that the air dryer is working as
> that could cause probs like stuck valves and ports.
>
> I would bench the hwh pump, and send it off to a good hydryloic
shop.
> it is nothing more than a electric motor driven hydrolic pump much
> like the units that power lift gates on delivery trucks. Low
battery
> use of any electric pump will eat up the motor ( bad grounds and
> undersized wire will do the same damage). when the motor gets
> compramised the failure is expotential and the battery requirement
to
> run gets larger. the pump does not get hurt by a weak battery and
or
> screwed up motor. I bet the e-motor is less than $300. to rebuild
and
> the pump woud be less than $600. ( no need to rebuild unless the
pump
> was the cause of e motor failure or slow run).
>
> GregoryO'Connor
> 94ptRomolandCa
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Stephen Birtles"
> wrote:
> >
> > Replace the valve about twenty dollars
> > Cant help with the pump
> > Stephen 77fc35
> >
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Bob Lawrence"
> > wrote:
> > >
> > > Hi group,
> > > One of our PNW bird guys has a air hissing problem. It seems
that
> when
> > > he pushes in the emergency valve, a black hose on the drivers
> side that
> > > hangs down hisses air. When the valve is pulled, the air leak
> stops.
> > > What can I tell him that might be the cause?
> > > He has an 87 PT40.
> > > Also he has been told his HWH pump is shot and will cost approx
> 4k to
> > > make a new one (per his conversation with HWH). Any other
source
> for
> > > this? He wants to get new if possible.
> > > Thanks for your help.
> > >
> > > Bob Lawrence
> > > 84 PT36
> > > Tacoma, Wa.
> > >
> >
>