73 freightliner cab over 300 cat motor - cannot get it to start. can't seem to get fuel to engine, put in new feul filter but still won't start. turns over fine. Is there another fuel pump besides the fuel injector? any other ideas??
Country: United StatesMake: FreightlinerModel: cab overYear: 1973Engine: 300 cat
new fuel filter,
Hi. Thanks for using JA! I will try and help you out. Does the engine have a hand primer pump?
It has the primer thing, and have tried that and nothing pumps up. , and it cut out while running, and just won't start up again.
I am going to check serial number. Where is that? Is it on the block?
Thanks for the information. It should be on the turbo side of the engine block. Also, if this is a 1973, it is most likely a 1693 or 1673. yellowman9941092.9903687153
it's a 3408 Cat, and the number i see is 92U60388, but maybe that is not the right number..
Thanks for the information. That is a good number. 92U is a 3406. It sounds like you have a fuel system problem. I would first turn the key on and listen for the shutoff solenoid to clink. If it does not, you have either a bad shutoff solenoid or no power to it.If it does click, you most likely have a fuel system problem. If you primed up the system it should have started even if the supply pump on the bottom was bad. Your fuel system most likely has failed. In the governor most likely.Please reply back if you need more help.
OK,this sounds like some good stuff to try, however, just where might i find the shutoff solenoid it this mass of hoses and wires? I do think, though, the solenoid is working from your description of what it should do.
and where might the governer be? Is it in the pump?
Just FYI when I initially was trying to get it going, a little fuel leaked out around the place where the footfeet linkage mounts to the frame, not sure if that makes any difference. I did have it running with ether for a few minutes, but once that ran out, it went dead.
The solenoid is on the back of the fuel system. If it is clicking, it is most likely working correctly. The governor is what the solenoid bolts to. It is basically the back half of the fuel system. There is most likely a problem inside of the governor causing the rack to not move to the on position.
Is there a place i see a picture of the governer and solenoid?
Let me see if I can fond one. Be back shortly.
Sorry for the delay. Here are some images of the solenoid and governor for a 92U 3406.
OK, that really helps know for sure what you are looking at! do you have to remove the governer to work on it? Is there a picture of the inside workings of that piece?
The governor can be removed without removing the entire fuel system. However, if you have never been inside one of these governors, you may want to remove the entire fuel system and send it to a shop that can rebuild them. There are many moving parts inside of the governor and can be difficult to remove and install. There are also a few special tools needed to do this. Sorry. I wish it was easy but this is a tough procedure even for a great tech if he has never done this.
As we got into this, I began to think this might cost more than the truck is worth. I am sure I can't tackle this governer thing myself, so may have to start look at replacing the truck. Your information has been very helpful, if for nothing else than to reassure me that the truck repair is more than I want to spend, and I can make an informed decision about getting a newer model.
You are very welcome. I am glad I could help.
I am ASE Master Truck Certified.
Yellow man99, we might need to start over... this is an 83 Freightliner, not 73! You would think a person would know what year his truck is... anyway, the pictures were not accurate so we took a look at what we thought was Soloniod, and the wiring attached, but not even sure that is the actual solonoid, maybe it a electric booster or something coming off solonoid? and there is a ground strap to that part that seems to be loose, but no change in getting it to start when that ground is held to the brass fittings. I do not hear or feel anything coming from solonoid when starter is on. Any other ideas? Shall I try removing the electric thing and see if the wires are good??
thanks for all your input on this..
Thanks for the update. I am glad to help.
If possible, if you could take a picture of the fuel system on the engine, that would help. If the images I sent are different, it must not be a 92U. Which is kinda strange. I figured it was not a 73 when you gave me the 92U serial number. However, I am assuming if the engine is not a 92U 3406, it must be a 1673 or 1693 engine. If it is, I can tell from a picture.