Hi All,
I gatta a problem.........
After some detective work and searching the archieves,
I think the throttle control shaft seal on the
injection pump is leaking.
I have a drawing of this area, It looks simple enough, about seven
bolts, a few gasket and a seal. Inside the pump there is a control
shaft and a riser shaft. They are aligned and clipped onto the
throttle shaft.
Not sure, I want to take this apart????????????????
Had anyone replaced the throttle shaft seal on the injection pump?
Has anyone removed the rear cover of the injection pump?
Does the injection pump need to be removed to access this rear cover?
Any help or advice appreiciated.
Bill 88 FC, weeping fuel
Bill,
My recently acquired 84 FC35 was filling up the valley and running
down onto the ground. With lights, mirrors and standing on my head,
I couldn't see where the leak was and was ready to pull the pump. I
saw some dampness on some of the 8 lines that run from the pump to
the injectors and didn't think that was the problem, but tightened
them anyway. Problem solved.
David Hollis 84 FC35 Springfield,IL
--- In
WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
>
> Hi All,
>
> I gatta a problem.........
>
> After some detective work and searching the archieves,
> I think the throttle control shaft seal on the
> injection pump is leaking.
>
> I have a drawing of this area, It looks simple enough, about seven
> bolts, a few gasket and a seal. Inside the pump there is a control
> shaft and a riser shaft. They are aligned and clipped onto the
> throttle shaft.
> Not sure, I want to take this apart????????????????
>
>
> Had anyone replaced the throttle shaft seal on the injection pump?
> Has anyone removed the rear cover of the injection pump?
> Does the injection pump need to be removed to access this rear
cover?
>
>
> Any help or advice appreiciated.
>
> Bill 88 FC, weeping fuel
>
If this is the seal I am thinking of, I ran across an account somewhere of this
same
problem, although the symptom was stalling at low speeds as air was getting
sucked into
the system. The page had a whole series of pictures showing the owner of the
coach
replaciing the seal. Perhaps if you google it, you could find it. It's been a
number of
months since I looked at the site, but my recollection is that the repair was
not that
complicated, just a little time consuming since it involved removing the intake
manifolds.
The injection pump was not removed but there was a kind of cover on the top of
the pump
(?) that was removed to access the shaft.
Kerry
--- In
WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
>
> Hi All,
>
> I gatta a problem.........
>
> After some detective work and searching the archieves,
> I think the throttle control shaft seal on the
> injection pump is leaking.
>
> I have a drawing of this area, It looks simple enough, about seven
> bolts, a few gasket and a seal. Inside the pump there is a control
> shaft and a riser shaft. They are aligned and clipped onto the
> throttle shaft.
> Not sure, I want to take this apart????????????????
>
>
> Had anyone replaced the throttle shaft seal on the injection pump?
> Has anyone removed the rear cover of the injection pump?
> Does the injection pump need to be removed to access this rear cover?
>
>
> Any help or advice appreiciated.
>
> Bill 88 FC, weeping fuel
>
If this is the seal I am thinking of, I ran across an account somewhere of this
same
problem, although the symptom was stalling at low speeds as air was getting
sucked into
the system. The page had a whole series of pictures showing the owner of the
coach
replaciing the seal. Perhaps if you google it, you could find it. It's been a
number of
months since I looked at the site, but my recollection is that the repair was
not that
complicated, just a little time consuming since it involved removing the intake
manifolds.
The injection pump was not removed but there was a kind of cover on the top of
the pump
(?) that was removed to access the shaft.
Kerry
--- In
WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
>
> Hi All,
>
> I gatta a problem.........
>
> After some detective work and searching the archieves,
> I think the throttle control shaft seal on the
> injection pump is leaking.
>
> I have a drawing of this area, It looks simple enough, about seven
> bolts, a few gasket and a seal. Inside the pump there is a control
> shaft and a riser shaft. They are aligned and clipped onto the
> throttle shaft.
> Not sure, I want to take this apart????????????????
>
>
> Had anyone replaced the throttle shaft seal on the injection pump?
> Has anyone removed the rear cover of the injection pump?
> Does the injection pump need to be removed to access this rear cover?
>
>
> Any help or advice appreiciated.
>
> Bill 88 FC, weeping fuel
>
Kerry,
Thanks for the response,
I Googled and posted on a few sites. I have not gathered enough
information to tackle this job myself. I could not find the site,
with pictures of how to replace the throttle rod seal.
I have a parts blow-up picture of the injection pump. If the rear
cover is removed a lot of part can fall out, push rods, springs,
governor weights etc, It looks easy enough, seven bolts, but I am
hesitant to try this with out experience.
I wish I had an old injection pump to disect.
Bill 88 FC Michigan
-- In
WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> If this is the seal I am thinking of, I ran across an account
somewhere of this same
> problem, although the symptom was stalling at low speeds as air
was getting sucked into
> the system. The page had a whole series of pictures showing the
owner of the coach
> replaciing the seal. Perhaps if you google it, you could find
it. It's been a number of
> months since I looked at the site, but my recollection is that the
repair was not that
> complicated, just a little time consuming since it involved
removing the intake manifolds.
> The injection pump was not removed but there was a kind of cover
on the top of the pump
> (?) that was removed to access the shaft.
>
> Kerry
>
>
> --- In WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
> >
> > Hi All,
> >
> > I gatta a problem.........
> >
> > After some detective work and searching the archieves,
> > I think the throttle control shaft seal on the
> > injection pump is leaking.
> >
> > I have a drawing of this area, It looks simple enough, about
seven
> > bolts, a few gasket and a seal. Inside the pump there is a
control
> > shaft and a riser shaft. They are aligned and clipped onto the
> > throttle shaft.
> > Not sure, I want to take this apart????????????????
> >
> >
> > Had anyone replaced the throttle shaft seal on the injection
pump?
> > Has anyone removed the rear cover of the injection pump?
> > Does the injection pump need to be removed to access this rear
cover?
> >
> >
> > Any help or advice appreiciated.
> >
> > Bill 88 FC, weeping fuel
> >
>
I couldn't find it on a google either. I seem to recall that only a small cover
with a couple
of bolts had to be removed but I may be wrong. I can't find the procedure in
the service
manual I have either.
Kerry
--- In
WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
>
>
>
> Kerry,
>
> Thanks for the response,
> I Googled and posted on a few sites. I have not gathered enough
> information to tackle this job myself. I could not find the site,
> with pictures of how to replace the throttle rod seal.
>
> I have a parts blow-up picture of the injection pump. If the rear
> cover is removed a lot of part can fall out, push rods, springs,
> governor weights etc, It looks easy enough, seven bolts, but I am
> hesitant to try this with out experience.
> I wish I had an old injection pump to disect.
>
> Bill 88 FC Michigan
>
>
> -- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
> wrote:
> >
> > If this is the seal I am thinking of, I ran across an account
> somewhere of this same
> > problem, although the symptom was stalling at low speeds as air
> was getting sucked into
> > the system. The page had a whole series of pictures showing the
> owner of the coach
> > replaciing the seal. Perhaps if you google it, you could find
> it. It's been a number of
> > months since I looked at the site, but my recollection is that the
> repair was not that
> > complicated, just a little time consuming since it involved
> removing the intake manifolds.
> > The injection pump was not removed but there was a kind of cover
> on the top of the pump
> > (?) that was removed to access the shaft.
> >
> > Kerry
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "pattypape"
> wrote:
> > >
> > > Hi All,
> > >
> > > I gatta a problem.........
> > >
> > > After some detective work and searching the archieves,
> > > I think the throttle control shaft seal on the
> > > injection pump is leaking.
> > >
> > > I have a drawing of this area, It looks simple enough, about
> seven
> > > bolts, a few gasket and a seal. Inside the pump there is a
> control
> > > shaft and a riser shaft. They are aligned and clipped onto the
> > > throttle shaft.
> > > Not sure, I want to take this apart????????????????
> > >
> > >
> > > Had anyone replaced the throttle shaft seal on the injection
> pump?
> > > Has anyone removed the rear cover of the injection pump?
> > > Does the injection pump need to be removed to access this rear
> cover?
> > >
> > >
> > > Any help or advice appreiciated.
> > >
> > > Bill 88 FC, weeping fuel
> > >
> >
>
Did you see this post over at the Cat RV forum. It doesn't sound as if a lot of
parts need to
be removed:
Pat,
> > The seal was bad under the top cover, There's not supposed
> > to be any
> > fuel visible if you take your fuel shut off solenoid off
> > and look
> > down in the hole.Mine had fuel in it, almost full. What
> > happens is
> > that either the throttle shaft seal, or the seal under the
> > cover
> > starts leaking a little air. The injector pump is also the
> > fuel pump
> > and sucks fuel from the tank. If there's an air leak, its
> > easier for
> > the air to come in than the fuel, then you start pumping
> > air to the
> > injectors. I had already changed the throttle shaft seal
> > two weeks
> > ago, its the one that usually goes bad first. Its also the
> > hardest
> > to get to. You have to remove the intake and at least one
> > injector
> > line to get to it. The top cover comes right off without
> > removing
> > anything. It's an easy enough job to do yourself, You just
> > need the
> > parts. The mechanic said they usually last about 12-15
> > years.
> > When they install a seal on The throttle shaft they also
> > install a
> > check valve in the governor housing to reduce the pressure
> > on the
> > seal.
> > Lee
Kerry
--- In
WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> I couldn't find it on a google either. I seem to recall that only a small
cover with a
couple
> of bolts had to be removed but I may be wrong. I can't find the procedure in
the service
> manual I have either.
>
> Kerry
>
> --- In WanderlodgeForum@yahoogroups.com, "pattypape" wrote:
> >
> >
> >
> > Kerry,
> >
> > Thanks for the response,
> > I Googled and posted on a few sites. I have not gathered enough
> > information to tackle this job myself. I could not find the site,
> > with pictures of how to replace the throttle rod seal.
> >
> > I have a parts blow-up picture of the injection pump. If the rear
> > cover is removed a lot of part can fall out, push rods, springs,
> > governor weights etc, It looks easy enough, seven bolts, but I am
> > hesitant to try this with out experience.
> > I wish I had an old injection pump to disect.
> >
> > Bill 88 FC Michigan
> >
> >
> > -- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
> > wrote:
> > >
> > > If this is the seal I am thinking of, I ran across an account
> > somewhere of this same
> > > problem, although the symptom was stalling at low speeds as air
> > was getting sucked into
> > > the system. The page had a whole series of pictures showing the
> > owner of the coach
> > > replaciing the seal. Perhaps if you google it, you could find
> > it. It's been a number of
> > > months since I looked at the site, but my recollection is that the
> > repair was not that
> > > complicated, just a little time consuming since it involved
> > removing the intake manifolds.
> > > The injection pump was not removed but there was a kind of cover
> > on the top of the pump
> > > (?) that was removed to access the shaft.
> > >
> > > Kerry
> > >
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "pattypape"
> > wrote:
> > > >
> > > > Hi All,
> > > >
> > > > I gatta a problem.........
> > > >
> > > > After some detective work and searching the archieves,
> > > > I think the throttle control shaft seal on the
> > > > injection pump is leaking.
> > > >
> > > > I have a drawing of this area, It looks simple enough, about
> > seven
> > > > bolts, a few gasket and a seal. Inside the pump there is a
> > control
> > > > shaft and a riser shaft. They are aligned and clipped onto the
> > > > throttle shaft.
> > > > Not sure, I want to take this apart????????????????
> > > >
> > > >
> > > > Had anyone replaced the throttle shaft seal on the injection
> > pump?
> > > > Has anyone removed the rear cover of the injection pump?
> > > > Does the injection pump need to be removed to access this rear
> > cover?
> > > >
> > > >
> > > > Any help or advice appreiciated.
> > > >
> > > > Bill 88 FC, weeping fuel
> > > >
> > >
> >
>
Ken,
Thanks for the response,
There is some information about low sulfer fuel causing problems on
the Cat RV Forum. I am still trying to collect information on
changing the throttle rod seal, Cat said this is a common leak.
I am trying to decide if this is a repair that I can complete.
So, it might be wise for owners of the older 3208's, to have a
solution ready, if or when their throttle rod seal begins to leak.
Bill 88 FC
--- In
WanderlodgeForum@yahoogroups.com, "towanda692006"
wrote:
>
> --- In WanderlodgeForum@yahoogroups.com, "dthollis1961"
> wrote:
> >
> > Bill,
> >
> > My recently acquired 84 FC35 was filling up the valley and
running
> > down onto the ground. With lights, mirrors and standing on my
head,
> > I couldn't see where the leak was and was ready to pull the
pump. I
> > saw some dampness on some of the 8 lines that run from the pump
to
> > the injectors and didn't think that was the problem, but
tightened
> > them anyway. Problem solved.
> >
> > David Hollis 84 FC35 Springfield,IL
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "pattypape"
> > wrote:
> > >
> > > Hi All,
> > >
> > > I gatta a problem.........
> > >
> > > After some detective work and searching the archieves,
> > > I think the throttle control shaft seal on the
> > > injection pump is leaking.
> > >
> > > I have a drawing of this area, It looks simple enough, about
seven
> > > bolts, a few gasket and a seal. Inside the pump there is a
control
> > > shaft and a riser shaft. They are aligned and clipped onto the
> > > throttle shaft.
> > > Not sure, I want to take this apart????????????????
> > >
> > >
> > > Had anyone replaced the throttle shaft seal on the injection
pump?
> > > Has anyone removed the rear cover of the injection pump?
> > > Does the injection pump need to be removed to access this rear
> > cover?
> > >
> > >
> > > Any help or advice appreiciated.
> > >
> > > Bill 88 FC, weeping fuel
> > >
> >To all, I may have an idea what is causing the leakeage you are
> experiencing. As you will soon be aware the sulfur level of on-road
> diesel is being lowered in most areas to 15ppm unless marked on the
> pump "low sulfur 500ppm". By October 31, 2007 most pumps will be
at
> 15ppm, due to the difficulty of pipelines to deliver both 500ppm
and
> 15ppm product. The process of removing the sulfur is causing
leakage
> in some older fuel pumps. From what we are hearing the cost is not
> excessive, about $200, but it is a nuisance. Thus far we have not
> heard of any problems relating to injectors, just the seals on the
> injector pump metering rod.
>
> Ken Marsh
> ToWanda
> 89WB 40PT
>