Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Curly McLain via Mercedes]

 > Curly wrote:


 Anybody familiar with these cat engines and the fuel
 pump/injection system?


The 14 L engines were know to require bleeding each injector
if it ever ran out of fuel.  That was in the 1990s.  I'm not
sure about newer CAT engines.


Well, they decided yesterday to haul it home, so I am not going to 
mess with it any more.


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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[fmiser via Mercedes]

> Curly wrote:
> 
> Anybody familiar with these cat engines and the fuel
> pump/injection system?

The 14 L engines were know to require bleeding each injector
if it ever ran out of fuel.  That was in the 1990s.  I'm not
sure about newer CAT engines.

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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Peter Frederick via Mercedes]

I would suspect the fuel filters unless you KNOW they have been  
changed recently.  They also act as water collectors and can crap up  
badly with little or no warning.


Fuel suppliers for large equipment are notorious for delivering bad  
fuel, too -- I've had to diagnose the contents a few times, including  
silicate (clay) dust that went through the filters and destroyed the  
engine at least once.


It can also take some cranking to get the IP to deliver fuel on those  
engines, again a well known issue.  Bad idea to ever let them lose  
prime.


Stanadyne injection pumps are also well known for solenoid failures --  
clicks by the valve itself it broken and won't open.


You should be able to prime the filters with the hand pump, verify  
that it pumps with the filters off.  It works like an MB with a  
pressure relief valve and a fuel return, although I don't know if the  
relief is in the pump or if there is a fuel return to the tank.


Peter

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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Curt Raymond via Mercedes]

We got a really bad dose of water delivered into the snowmobile trail groomers 
once last winter. The supplier tried to say that "All diesel engines have water 
problems". I couldn't help myself and replied with "Bullshit." he said "What do 
you know about diesel engines?" I just pointed at the Jetta. He shut up and 
that delivery of fuel was credited to our account.
-Curt

  From: Peter Frederick via Mercedes <mercedes@okiebenz.com>
 To: Mercedes Discussion List <mercedes@okiebenz.com> 
Cc: Peter Frederick <psf...@earthlink.net> 
 Sent: Friday, October 9, 2015 11:02 AM
 Subject: Re: [MBZ] Starting a dormant Cat truck v8 diesel
   
I would suspect the fuel filters unless you KNOW they have been  
changed recently.  They also act as water collectors and can crap up  
badly with little or no warning.

Fuel suppliers for large equipment are notorious for delivering bad  
fuel, too -- I've had to diagnose the contents a few times, including  
silicate (clay) dust that went through the filters and destroyed the  
engine at least once.

It can also take some cranking to get the IP to deliver fuel on those  
engines, again a well known issue.  Bad idea to ever let them lose  
prime.

Stanadyne injection pumps are also well known for solenoid failures --  
clicks by the valve itself it broken and won't open.

You should be able to prime the filters with the hand pump, verify  
that it pumps with the filters off.  It works like an MB with a  
pressure relief valve and a fuel return, although I don't know if the  
relief is in the pump or if there is a fuel return to the tank.

Peter



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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Curly McLain via Mercedes]

Thanks!  You da Mann!  I was hoping you have encountered this.  I 
onlyhave me, so I turned the key on, then walked around and whack on 
it.  Sounds like i need to take the wire off, then touch the wire to 
the solenoid while whacking.   Mahalo Nui Loa!




Diesel engine only needs 3 things to start and run.. fuel, air,
compression..

Since it will fire off on ether, it has air and compression.. you don't
have fuel.. thus..

The problem is not uncommon when a cat engine sets unused.. the fuel
shutoff solenoid that turns off fuel to shut down the engine is stuck in
closed position.

If you hear the solenoid click, then electric current is present to
solenoid, but the mechanical part is stuck from not being used and thus
doesn't let fuel come to IP.

Rapping it with a hammer [litely please... don't wail on it] while cycling
the key on and off to energize the solenoid is sometimes successful..

Not possible to do with only ONE person.. needs two.. get a helper to run
the key.. try it..

If that fails.. R the solenoid fuel shutdown valve.. Clean it up.. you
should be good to go..

On Thu, Oct 8, 2015 at 6:26 PM, Curly McLain via Mercedes <
mercedes@okiebenz.com> wrote:


 On Thu, 8 Oct 2015 19:19:30 -0500 Curly McLain via Mercedes

  wrote:

  Anybody familiar with these cat engines and the fuel pump/injection

  system?



 Sorry, no.

  Starts up on ether, but still  no fuel.  Tried to use the primer pump

  at the filter, but either it is rusted up or hard to press because of
  fuel pressure.


 


  If the hand primer worked, i could crack the line out from the filter
  and see if fuel is there.



 How about cracking the line out from the filter and running it a short
 time on ether to see if there is fuel there (positioned with a wrench, of
 course to tighten the line if there should be a geyser of fuel)?

 Craig




 I was just going to crank it.  if none cranking, then we can see what
 happens with a shot of ether.THere won't be anyone with a wrench to
 tighten it up.  if it leaks fuel, the fuel will leak.  its a ways form the
 cab to the fuel filter, and I only have me.


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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Craig via Mercedes]

On Thu, 8 Oct 2015 19:19:30 -0500 Curly McLain via Mercedes
 wrote:

> Anybody familiar with these cat engines and the fuel pump/injection
> system?

Sorry, no.

> Starts up on ether, but still  no fuel.  Tried to use the primer pump
> at the filter, but either it is rusted up or hard to press because of
> fuel pressure.

> If the hand primer worked, i could crack the line out from the filter 
> and see if fuel is there.

How about cracking the line out from the filter and running it a short
time on ether to see if there is fuel there (positioned with a wrench, of
course to tighten the line if there should be a geyser of fuel)?


Craig

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[MBZ] Starting a dormant Cat truck v8 diesel

[Curly McLain via Mercedes]

Yesterday I tried to start a cat V8 DIesel in a shovey truck, between 
26,000 and 29,500 lb GVWR


FUel in tanks, put in 2 new batteries

Cranks but acts like there is no fuel.  Starts up on ether, but still 
no fuel.  Tried to use the primer pump at the filter, but either it 
is rusted up or hard to press because of fuel pressure.


I can hear the fuel shutoff solenoid click on and off with the key. 
Tried tapping it with a hammer when the key was on.


Still no fuel.

Anybody familiar with these cat engines and the fuel pump/injection system?

I'm not sure what to try next.

Thinking about changing fuel filter, but I want to figure out where 
the transfer pump is and how it works first.


If the hand primer worked, i could crack the line out from the filter 
and see if fuel is there.


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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[Curly McLain via Mercedes]

On Thu, 8 Oct 2015 19:19:30 -0500 Curly McLain via Mercedes
 wrote:


 Anybody familiar with these cat engines and the fuel pump/injection
 system?


Sorry, no.


 Starts up on ether, but still  no fuel.  Tried to use the primer pump
 at the filter, but either it is rusted up or hard to press because of
 fuel pressure.



 If the hand primer worked, i could crack the line out from the filter
 and see if fuel is there.


How about cracking the line out from the filter and running it a short
time on ether to see if there is fuel there (positioned with a wrench, of
course to tighten the line if there should be a geyser of fuel)?

Craig



I was just going to crank it.  if none cranking, then we can see what 
happens with a shot of ether.THere won't be anyone with a wrench 
to tighten it up.  if it leaks fuel, the fuel will leak.  its a ways 
form the cab to the fuel filter, and I only have me.


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Re: [MBZ] Starting a dormant Cat truck v8 diesel

[G Mann via Mercedes]

Diesel engine only needs 3 things to start and run.. fuel, air,
compression..

Since it will fire off on ether, it has air and compression.. you don't
have fuel.. thus..

The problem is not uncommon when a cat engine sets unused.. the fuel
shutoff solenoid that turns off fuel to shut down the engine is stuck in
closed position.

If you hear the solenoid click, then electric current is present to
solenoid, but the mechanical part is stuck from not being used and thus
doesn't let fuel come to IP.

Rapping it with a hammer [litely please... don't wail on it] while cycling
the key on and off to energize the solenoid is sometimes successful..

Not possible to do with only ONE person.. needs two.. get a helper to run
the key.. try it..

If that fails.. R the solenoid fuel shutdown valve.. Clean it up.. you
should be good to go..

On Thu, Oct 8, 2015 at 6:26 PM, Curly McLain via Mercedes <
mercedes@okiebenz.com> wrote:

> On Thu, 8 Oct 2015 19:19:30 -0500 Curly McLain via Mercedes
>>  wrote:
>>
>>  Anybody familiar with these cat engines and the fuel pump/injection
>>>  system?
>>>
>>
>> Sorry, no.
>>
>>  Starts up on ether, but still  no fuel.  Tried to use the primer pump
>>>  at the filter, but either it is rusted up or hard to press because of
>>>  fuel pressure.
>>>
>> 
>>
>>>  If the hand primer worked, i could crack the line out from the filter
>>>  and see if fuel is there.
>>>
>>
>> How about cracking the line out from the filter and running it a short
>> time on ether to see if there is fuel there (positioned with a wrench, of
>> course to tighten the line if there should be a geyser of fuel)?
>>
>> Craig
>>
>
>
> I was just going to crank it.  if none cranking, then we can see what
> happens with a shot of ether.THere won't be anyone with a wrench to
> tighten it up.  if it leaks fuel, the fuel will leak.  its a ways form the
> cab to the fuel filter, and I only have me.
>
>
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>
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>
> To Unsubscribe or change delivery options go to:
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>
>
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