Conversion of Truck Engine CAT 3406 f...

Since: Jul 08

Location hidden

#22 Jul 7, 2008
Gordon wrote:
I have a 77 KW with a 3406A block with brake saver. The brake saver is junk, does not work and leaks much oil. Can this be removed or disabled so it will not leak. I have had advice not to try to fix it as you may spend the money and not obtain the desired results. The engine is due for a rebuild at this time so I would like to resilve the brake saver problem. Any advice would be great, Thanks
disable the air line that controls the brakesaver spool, that should disable the brakesaver for good. but if the internal seals have failed there's no other way than repairing them. the brakesaver has an external lubrication line that is located at the top of the flywheel housing. that line feeds lubrication to the rotor seals and bushings so you cant disable that. if the internal seals are ok then by disabling the air line from the vehicle brakes to the brakesaver control valve should do the trick.

Since: Jul 08

Location hidden

#23 Jul 7, 2008
cjh wrote:
I have a 99 kenmwoth w900l with a 3406b in it and at twenty pounds of boast and about seventeen hundred rpm it loses all is power and starts missing really bad
check the fuel transfer pressure. should be around 18-35 psi. if too low it'll run ok at idle but starts running rough under load. could be worn fuel nozzles or the element fuelpumps. once boost and load increases, the pressure of the combustion increases dramatically, and the fuel system may not be able to atomize (spray) the fuel correctly.
solarant

Maineville, OH

#24 Jul 16, 2008
I need help, I have a 3406E, and at times it wont start.
When this happens I have release diesel pressure from the fuel filter, then give it a shot of ether and rev high, the engine will then run.
I changed the filter primer and filter housing and check valve, I also changed some fuel lines, I changed the fuel pump but I still get this problem.
Once the truck is started it stays started, so lets say I run 200 miles and I shut it down, the truck starts then slowly dies, I have to go through the above procedure, I unscrew the fuel filter and I get a squirt of diesel under pressure from the filter, I then tighten it up and ether it etc.
There is fuel going to the ecm and back out, the return lin e from the injectors is ok and pushing fuel back fine also.
Anyone have any ideas why diesel pressure is building up in the filter and not being released.

Since: Jul 08

Location hidden

#25 Jul 16, 2008
solarant wrote:
I need help, I have a 3406E, and at times it wont start.
When this happens I have release diesel pressure from the fuel filter, then give it a shot of ether and rev high, the engine will then run.
I changed the filter primer and filter housing and check valve, I also changed some fuel lines, I changed the fuel pump but I still get this problem.
Once the truck is started it stays started, so lets say I run 200 miles and I shut it down, the truck starts then slowly dies, I have to go through the above procedure, I unscrew the fuel filter and I get a squirt of diesel under pressure from the filter, I then tighten it up and ether it etc.
There is fuel going to the ecm and back out, the return lin e from the injectors is ok and pushing fuel back fine also.
Anyone have any ideas why diesel pressure is building up in the filter and not being released.
The fuel filter is pressurised cause it's built as part of the transfer pressure line. have you measured the pressure? should be between 40 and 80 psi. does your engine have a fuel recirculation valve and a line that leads from the fuel return port and back to the fuel pump?
b dobbin

Westbank, Canada

#26 Sep 15, 2008
changed motor 3176 in 345 cat hoe to a c12 computer not compatable know how fix

Since: Sep 08

Peoria, AZ

#27 Sep 17, 2008
b dobbin wrote:
changed motor 3176 in 345 cat hoe to a c12 computer not compatable know how fix
Ok lets start with the back hoe serial number and the serial number of the engine that you put in.
Charlie Monson

United States

#28 Sep 19, 2008
nko wrote:
I am a dealer in Diesel Gensets.
I need to know what changes need to be made to convert Cat 3406 Truck Engine for use in Diesel
Generator Sets.
Thanks for your input.
Biggest issue you are going to have is the governor. I have the proper part numbers and they are readily available to me if I have about a 30 minute lead time. If my memory serves me right, I might have a complete industrial governor assembly in my garage at home as we speak. All it would need is throttle shaft bushings and sealed up. Let me know if I can help. I love horsepower, but I also love dependability. I have the ability and knowledge to obtain both plus excellent fuel economy as well. Hope I can be of help. C.
Charlie Monson

United States

#29 Sep 20, 2008
DynPro wrote:
<quoted text>
disable the air line that controls the brakesaver spool, that should disable the brakesaver for good. but if the internal seals have failed there's no other way than repairing them. the brakesaver has an external lubrication line that is located at the top of the flywheel housing. that line feeds lubrication to the rotor seals and bushings so you cant disable that. if the internal seals are ok then by disabling the air line from the vehicle brakes to the brakesaver control valve should do the trick.


Would you consider selling the brakesaver complete when you remove it?? I know someone who wants one regardless of the condition it is in...for what reason I do not know...also, what is your location?? Need to know that to determine if I can come pick up the brakesaver in my personal verhicle or if I'll have to have an old flatbedder buddy of mine throw it in with a load of his.....thanks for your consideration.....C.
Ralph

Kuwait

#30 Sep 20, 2008
I have a 3406 on a generator that is getting fuel into the crankcase. Is that a bad fuel transfer pump or bad injection pump? any help out there
ronnie

Columbus, GA

#32 Oct 2, 2008
3406 cat c-14 sputters in the low gears. changed everything. from hoses to primers ,and injectors. i even had a cylinder test done as well. the primer looses it's pressure at times. please help

Since: Jul 08

Location hidden

#33 Oct 3, 2008
Ralph wrote:
I have a 3406 on a generator that is getting fuel into the crankcase. Is that a bad fuel transfer pump or bad injection pump? any help out there
mechanical 3406 or electronic?

if mechanical:

- Both are possible but i'd say its more likely the tranfer pump thats leaking fuel into your distributor pump oil compartment which drains to the oilpan. the unit is fairly cheap as a reman part, so i suggest you try changing that first.

- The injection pumps (element pumps, one for each cyl), the bottom face seal migh leak but thats extremely rare.

- A leaking fuel injection nozzle but that also causes missfiring and white smoke, which i assume you're not having.

if the engine is electronically controlled:

- The transfer pump shaft might be leaking into the front gear housing.

- One of the fuel injectors might have a broken upper sealring which would cause the fuel gallery pressure to leak inside the valve compartment.

- An injector that leaks fuel into the cylinder, but since no missfiring or white smoke this is highly unlikely.

hope this helps

Since: Jul 08

Location hidden

#34 Oct 4, 2008
ronnie wrote:
3406 cat c-14 sputters in the low gears. changed everything. from hoses to primers ,and injectors. i even had a cylinder test done as well. the primer looses it's pressure at times. please help
mechanically or electronically controlled engine?
ronnie

Columbus, GA

#35 Oct 6, 2008
DynPro wrote:
<quoted text> mechanically or electronically controlled engine?
electronical

Since: Jul 08

Location hidden

#36 Oct 7, 2008
ronnie wrote:
3406 cat c-14 sputters in the low gears. changed everything. from hoses to primers ,and injectors. i even had a cylinder test done as well. the primer looses it's pressure at times. please help
by primer you must mean the fuel transfer pump? if your transfer pressure drops below 170kPa (24psi) it will affect your engine operation. if the transfer pressure disappears occasionally, the fuel pressure relief valve may have failed. the valve is a part of the fuel filter base. or, on earlier 3406E, it might be located at the back of the cyl head, in the fuel return line.
hope this helps.
shayne

Courtenay, Canada

#37 Nov 16, 2008
Ron wrote:
I have a 2000 Sterling with a 3126B Cat. About a yr ago, it got hard to start. Took it into 2 different Cat dealerships. One changed the cam sensor, but it didn't make a difference. Now it is even more hard to start. It seems after 24hr is really hard to start...If I leave it longer it's really really hard to start. When and if I get it started, it seems to run like it has been run out of fuel for at least 20 minutes to an hour. After it does finally begin to run right, it seems fine.
Any suggestions as to what my problem is.(One dealer told me "they all run like that").
i had this problem and all it was for my cat was a fuel check valve mounted on the bottom of fuel filter base, my motor is a c15 3406 c 15 try that an good luck with this
ronnie

Columbus, GA

#38 Jan 2, 2009
thanks that fixed the fuel problem, but it still sputters white smoke when starting then runs fine
DynPro wrote:
<quoted text>
by primer you must mean the fuel transfer pump? if your transfer pressure drops below 170kPa (24psi) it will affect your engine operation. if the transfer pressure disappears occasionalthe fuel pressure relief valve may have failed. the valve is a part of the fuel filter base. or, on earlier 3406E, it might be located at the back of the cyl head, in the fuel return line.
hope this helps.
ryan

Pittsburgh, PA

#39 Jan 11, 2009
I have 1996 peterbuilt with a cat 3406e ive been having a problem with it starting. Last week it wouldnt start so i changed the fuel filters and got it running only ran it for a minute or two went to start the truck later that day and wouldnt start so i cracked the lines at the fuel filter and got it running. now friday the truck ran all day came back shut it off and wouldnt start a couple hours later so again i changed fuel filters they were half empty and again truck wouldnt start does any one have any ideas?
dutch

AOL

#40 Jan 28, 2009
i have a 3406 b model cat,it getting coolant in crankcase,dosent overheat,but after sitting cant get it to start without priming the pump by hand.

Since: Jul 08

Location hidden

#41 Feb 3, 2009
ryan wrote:
I have 1996 peterbuilt with a cat 3406e ive been having a problem with it starting. Last week it wouldnt start so i changed the fuel filters and got it running only ran it for a minute or two went to start the truck later that day and wouldnt start so i cracked the lines at the fuel filter and got it running. now friday the truck ran all day came back shut it off and wouldnt start a couple hours later so again i changed fuel filters they were half empty and again truck wouldnt start does any one have any ideas?
check your fuel suction line for airleaks. the air could also be combusion gasses escaping under a loose injector or failed injector.

Since: Jul 08

Location hidden

#42 Feb 3, 2009
dutch wrote:
i have a 3406 b model cat,it getting coolant in crankcase,dosent overheat,but after sitting cant get it to start without priming the pump by hand.
start by checking the water pump spill port, which needs to be free of debris and restrictions. if the waterpump seal has failed and the spill port is restricted water will leak into the front timimg gear train. the secon possibility is cylinder liner seals. it could also be the oil cooler but that would leak in the opposite direction, oil in coolant. remove you oil pan and find a way to pressurize your cooling system. i recommend you pressurize it up to 3 bar (43psi) and not much over. monitor the pressure for attleast 15 minutes and check for visible crankcase leaks.

regarding the starting issue, check your fuel tranfer pressure and make sure the fuel suction line is free of leaks and restrictions.

hope this'll help

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