M51A2 with LDT 465-1C engine - Steel Soldiers::Military Vehicles Supersite

swigs84 · 03-25-2011, 21:51

first of all i am new here. i am a civilian contractor for the army and work on all kinds of militaty vehicles but have never messed with an LDT 465-1C motor. My neighbor has a 1971 model M51A2 5 ton with a 1975 white LDT 465-1C motor in it......i am not even sure if they put these motors in this truck but he says the guy he got it from swapped out the motor. He can not get the thing to run and wants me to fix it for him. It is getting fuel up to the injector pump but nothing after that. He said the piston in the injector pump head was froze up so he dumped some kind of solvent down it and got it freed up. He has another used injector pump he got for it but i am just wondering if i should try and swap the ip heads out first and see what happens or go ahead and just change out the whole pump? any help is greatly appreciated

gimpyrobb · 03-25-2011, 21:57

Welcome. He DIDN'T get the head freed up if it isn't running. Swap out the hydraulic head, it is easier than doing the whole IP.

swigs84 · 03-25-2011, 22:00

thats kinda what i am thinking but he said he got the piston in the head to move after putting the solvent in it. i havent really looked at it to close yet. i just went over and got the numbers off the engine so i could get the manuals for it

swigs84 · 03-25-2011, 22:01

is there anything special i need to know about swapping out the heads before i do it.........i havent really looked at my books yet

gimpyrobb · 03-25-2011, 22:17

Yeah, lots of info on here about swapping the HH. A search of the deuce forum should get you the info needed.

swigs84 · 03-25-2011, 22:27

so am i right that they did not put the LDT 465-1C in a 5 ton??

gimpyrobb · 03-25-2011, 22:32

Ehh, 6 of one, a half dozen another. No- originally they had an LDS motor, but there is only about 50hp between the two(LDT and LDS).

M813A1 · 03-25-2011, 23:18

You can download all of the tech manuals here from this site !! That might give you a good starting place to do the work on your friends truck !

gimpyrobb · 03-26-2011, 02:34

Sorry to say, the TM section has passed away on our site. We now get to send people to other sites, many commercial, which seems like promotion of their sites(cheer-leading according to our rules), which isn't really allowed here, but since we can't figure out how to get them back up, I guess its OK.

swigs84 · 03-26-2011, 08:07

ive already gotten the manuals just need to look through them and see what i am dealing with before i go mess with it. It might be awhile before i get to work on it, it is sitting in the middle of a pasture and the weather here has sucked lately