68 350 acting strange

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lawsonj5
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68 350 acting strange

Post by lawsonj5 » Thu Jan 03, 2013 12:15 pm

I was running my 350 about 2 months. Turned the key off and the machine kept running. Let it idle for about 5 minutes and it finally sputtered down and died. Same thing the next day. Fired the machine up yesterday, let it warm up then did one back blade down my driveway. Was pulling the hill back up the driveway and the engine idled down to about half throttle, then kept getting lower. I tried to throttle down and then back up with no success. It just stayed at idle. I was able to idle it back the to shop and then idled the machine all the way down and it died. I was told by a friend who works for Pape that it could be a solenoid problem for the injector pump but I dont see any kind of solenoid in my parts manual. All I see is a governor. My I.D. tag on the pump has the following:

Roosa-Master
JDB331AL2405 2500 (RPM's I assume)
1640120 AR-49899

I cant seem to find the matching numbers for this pump in the parts manual for my machine. Can anybody help me with my problem? I'm not sure what is wrong or where to start?

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scampr
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Post by scampr » Thu Jan 03, 2013 12:53 pm

I might think maybe 2 different problems.. the second one acts like a fuel filter that was plugging up. The problem of not shutting off i would have pass on to someone else that is more familier with the injector pumps.
scampr 440icd, 350B, 47 Farmall H, 55 Farmall cub and ashamed to have a Kabota too

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Tigerhaze
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Post by Tigerhaze » Thu Jan 03, 2013 1:29 pm

I will preface this by saying I am by no means an injection pump expert like others on here but have read a lot of their thread so know where to find them and have a little knowledge on fuel-related issues because of them.

Apparently you have JDB pump- the numbers may not match to your manual if the original was replaced with a pump from a JD tractor or other machine.

There is a fuel shutoff solenoid that is either on or off- however others on here state that they rarely go bad themselves- usually the linkage to it instead.

http://www.jdcrawlers.com/messageboard/ ... ght=sm2046

There is a service manual specifically for injeciton pumps that you should read (SM-2045).

http://www.jdcrawlers.com/messageboard/ ... ght=sm2045

There is a lot of information about injection pump/fuel issues on this board- read these two representative threads to start for some ideas- you can also do a search for more:

http://www.jdcrawlers.com/messageboard/ ... d&start=15

http://www.jdcrawlers.com/messageboard/ ... p+solenoid

Post back with questions after you do some of these intial recommended checks.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment

cdunn
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Post by cdunn » Thu Jan 03, 2013 3:08 pm

I have a 350(straight) that started doing the same thing as you describe. I replaced the fuel supply pump that mounts to the engine right before the filters and have had no more problems with it idleing down as you said.
57 420c 86 Ford 4600
67 350 dozer
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58 Oliver OC-4
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Struck Mini-Dozer

lawsonj5
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Post by lawsonj5 » Thu Jan 03, 2013 7:30 pm

I didn't have much time today to look at the machine other than give it a good cleaning. Tried to start it though and it barely made an attempt but wouldn't fire. I think I have a fuel issue. When I get a chance I will put new filters in it and check the transfer/ supply pump and see what happens.

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LeonardL
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Post by LeonardL » Thu Jan 03, 2013 7:32 pm

Check the vent in the fuel tank as well. If the vent is plugged it will cause your issue as well.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

lawsonj5
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Post by lawsonj5 » Fri Jan 04, 2013 9:20 pm

Checked the vent in the tank. It appears to be clear. I pulled the outlet line off the transfer pump and cranked the engine over. There was three good squirts that came out and then just a trickle. I pulled the seat off and noticed that a previous owner has installed a universal inline fuel filter right after the shutoff valve from the tank. I'm wondering if this is plugged or if my transfer pump is bad. Tomorrow I'm hoping to have time to pull this filter out and check it. Would you guys recommend installing a new filter or just putting the straight line back in like it was from the factory?

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LeonardL
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Post by LeonardL » Sat Jan 05, 2013 8:57 am

It can't hurt to have an extra filter in the line. Although You probably should check the bottom of the tank to see if you have any thing going on there. Trash, water or just gunk in general. Either way you will be okay on the extra filter.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

KenP
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Post by KenP » Sat Jan 05, 2013 1:28 pm

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Last edited by KenP on Sat Jun 01, 2013 3:25 pm, edited 1 time in total.
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lawsonj5
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Post by lawsonj5 » Sat Jan 05, 2013 10:04 pm

Thanks for all the help and advice. Checked the vent tube in the tank and it's clear. I pulled the small (add on) filter off this morning and although I couldn't see it, the whole bottom of the filter is plugged with debris. I then proceeded to drain the tank into a large clear pan that I have. Fuel flowed with ease out of the tank and there was nothing dirty that came out so I think I'm good as far as the tank goes. I'm going to put another small filter back in line just in case the screen has been removed from the tank and keep a couple extra on the machine just in case. I also installed two new fuel filters and cleaned the bowls out. Cranked the engine over and now I have constant spurts of fuel from the transfer pump but apparently when I removed the hard line from the transfer pump to fuel filters I damaged the line so now it leaks pretty bad. I'm going to see if I can get a flexible line made so this wont happen on future repairs. Has any one experienced this problem or seen flexible lines for this application?

On another note, my battery is pretty much toast. Can you guys suggest what I should get as a replacement? I was reading through other threads and came across an interstate part # 29h-vhd. My knowledge of battery's is limited so I could use some insight.

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jtrichard
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Post by jtrichard » Sat Jan 05, 2013 10:24 pm

31P-LHD Interstate is a 750CCA post type that's what it takes it has 90 more CCA and weights 6 pounds more
2010 with 622 dozer with mod. 35 ripper and a 2010 with 622 dozer bought in 1969 and a 2010 loader with drott and mod. 36 ripper

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Tigerhaze
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Post by Tigerhaze » Mon Jan 07, 2013 5:43 pm

Any Group 31 battery should be good- I liked the "Energizer" brand that Sam's Club sold but any Group 31 12V battery made for industrial equipment should be good.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment

lawsonj5
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Post by lawsonj5 » Mon Jan 07, 2013 9:27 pm

Got some time wot work on my dozer today while my wife and baby took a nap. As of now I have replaced all fuel filters, installed a new transfer pump and checked to make the tank and vent tube are good. Also installed a new battery. I now have a good solid flow of fuel at the injection pump but the engine still wont fire. I cracked the line on two of the injectors like the repair manual says but there was very little fuel that came out (couple drips maybe at most). I have 12 volts coming to the solenoid when the key is on and if I turn the key on and off I can hear the solenoid clicking so I assume its opening and closing but is there any other way to tell. Is there a bleeder somewhere on this pump that I am unaware of? I feel like I'm missing something?

andregrondin
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Post by andregrondin » Tue Jan 08, 2013 11:10 am

as I read this post it make's me think twice ,
when I turn off the key, the engine NEVER stop , I have to bring the throttle lever completely down to shut down the engine , is that ok or the previous owner made somme good or bad changes on the dozer ?
Dig in boy !!
J-D 350 straight 1966
model # = T4F3D
serial # = 08883T

J-D 690-B 1980
model # = D690B
serial # = 007364T

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Paul Buhler
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Post by Paul Buhler » Tue Jan 08, 2013 5:55 pm

Since the Diesel engine doesn't use a spark to ignite the fuel, to shut down the engine you have to cut off the fuel supply which is what happens when you bring the fuel lever down. Your machine shut off is functioning as designed.

On a gas machine, turning off the electric switch cuts the electricity to the spark plugs and the engine stops.

Hope this helps. Paul
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch

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