priming fuel system

[rescueram]

Hi,
I am new to the maintenance aspect of M35A2's. I am doing a PM on a recently acquired 1971 AMG with a Hercules multifuel. I have a couple quick questions:

1. Is it necessary to re-prime the fuel system when doing a fuel filter service (primary, secondary and final)?

2. If so, what is the procedure (manually refilling canisters, cracking injector lines at the injector, etc)?

3. I think the in-tank electric pump is el-tostado; will I be able to get the truck running again without it?

If this has been asked 1,000 times before, please don't flame me. I tried searching previous threads and didn't find what I was looking for. I don't have access to a TM, so I am hoping someone will guide me. Thanks in advance for any help and/or advice.

 

[wsucougarx]

Yes you do prime the fuel system. There is a relief valve on top of the secondary/final fuel filter assy. Open the valve, turn on the accessory switch, you'll hear the air purging through, then fuel...shut the valve and start cranking

Before toasting the intank pump, check the fuse to make sure that is toast rather than the entire pump. Do you get any sound when you flip the accessory switch or vibration from the top of the in tank fuel pump cover?

 

[littlebob]

I've not had that issue yet and all I can tell you to is go to resourse and find the TM there. I changed all of my filters and was able to get going again by first running the in tank pump to purge the air out of the secondaries. Without a functional pump I don't know

 

[hndrsonj]

The TM's are under resources at the top of the page.

 

[jim-m35a2]

My in-tank pump took a dump too. I bought a 24V in-line pump from NAPA for 90 bucks and cut the fuel line above the tank and installed it. The fuel system is a loop system and I just ran the pump till the air bubbles in the tank slowed down and fired the truck up. There is a company that sells new in-tank fuel pumps for $200+ bucks, do a search on this site and the guys name will come up.

Jim
Jim
________
Kitchen Measures

 

[rescueram]

Thanks for all the quick replies. The LP does not make any noise when the master is on... I will be checking the fuse and pump condition tomorrow, though based on the amount of crapola that came from the filters, I am afraid of what I will find both there and in the tank.

WSU- The bleeder is the brass screw (maybe nut, I can't remember) on the assembly, between the two filters?

Jim- Do you have any pictures of your pump install? I'm going for functionality, not authenticity. The NAPA pump seems like the solution for me if the in-tank pump is dead. By chance, did Napa stock that pump?

 

[frodobaggins]

My in tank pump didn't work. I filled all the cans up, and used ether till it started.
Then bled the lines.

 

[tjcouch]

Jim- Do you have any pictures of your pump install? I'm going for functionality, not authenticity. The NAPA pump seems like the solution for me if the in-tank pump is dead. By chance, did Napa stock that pump?

Here's mine . . . works great.

http://www.steelsoldiers.com/deuce/24993-fuel-pump.html#post258230

 

[rescueram]

Fuse is good, power is good, LP is DOA- so I guess it's off to NAPA to see what they can do for me...