New Plugs/ Won’t Start?

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    • May 9, 2015 at 12:54 pm #37726
      clayton991
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        I will of course do the electrical checks, but I thought I might be missing something obvious. Do all Y385s have a compression release lever?

        Thx

      • May 9, 2015 at 1:14 pm #37727
        clayton991
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          Never mind. Found the compression release lever. Never used it before. I'll try that. Its frustrating that other than difficult to start, its been running great for years.

        • May 10, 2015 at 1:06 pm #37738
          clayton991
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            checked the plug circuit with the volt meter. I'm getting no juice to the plug bus bar wire. No power downstream from the key switch on the plug circuit. Volt meter is grounded well, shows 12 volts off the battery. But….here's the curious part. When I got to the fuse box, there was no fuse where the input and output wires for the plug circuit went. The two 30 amp fuses are there, but that's not where the green # 39 (bus bar wire) and the green #12 (key switch wire) meet up. So, I put a 30 amp fuse in…and…nothing. Then I checked farther upstream and had no power downstream from the key switch anyway….

            But, that means I've been starting without plugs for….who knows how long? So, I checked and theres fuel flow at the injectors, its turning over fast (jumped to my truck)….if it started before, why won't it start now???

          • May 10, 2015 at 1:10 pm #37739
            clayton991
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              Took the key switch out, ordering a new one. I wonder if the old thin oil allowed more heat to build up so it would start without the plugs?

            • May 10, 2015 at 4:31 pm #37741
              Tontosgold
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                Hi Clayton,

                Fuel, air and compression – necessary factors for diesel engine combustion. One of these is missing. 

                If you removed the valve cover to mess with the glow plugs you have to ensure the decompression lever fork seats correctly on the pin, otherwise when you tighten the cover nuts the valves will be held open giving the symptoms you describe. Check this first.

                My engine doesn't need glow to start either when I have a fully charged battery.

                Dozer YCT306S shuttle shift - root rake, tree-pusher, backhoe
                Excavator Hyundai 17 ton

                QLD, Australia

              • May 10, 2015 at 7:32 pm #37748
                Bob Rooks
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                  People have installed relays in the glow plug circuit for that very reason, to avoid having the high amperage inrush go through the key switch.

                  What weight / type of engine oil are you using? This can make a difference in cold weather. A 15w-40 oil that meets API CH-4, CG-4, CF-4, CE such as Chevron Delo 400LE or Shell Rotella T.

                  Account deleted.

                • May 11, 2015 at 12:55 am #37752
                  ronjin
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                    here are a couple of things that may help you with the glow plug wiring:

                    http://i289.photobucket.com/albums/ll212/ronj2000/ConnectorConnections.jpg

                     

                    http://i289.photobucket.com/albums/ll212/ronj2000/FuseBlockWiring.jpg

                    ronjin

                  • May 11, 2015 at 6:45 pm #37755
                    clayton991
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                      Bob, Ron,

                      Thank you. Helpful info. I'll get that valve cover off and see what I've got. It has to be compression. Air and fuel are good. Thanks for the electrical block diagrams. Very helpful.

                    • May 18, 2015 at 5:46 pm #37796
                      Tontosgold
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                        Well we haven't heard back from Clayton so I expect he fixed the problem.

                        Dozer YCT306S shuttle shift - root rake, tree-pusher, backhoe
                        Excavator Hyundai 17 ton

                        QLD, Australia

                      • May 18, 2015 at 7:00 pm #37797
                        Bob Rooks
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                          Clayton,

                          Air, fuel, and compression is correct, but there is one element missing. Timing. They must occur in a specific sequence. If your compression release isn't working, you remove compression from the equation.

                          Clayton may be a “taker”. Gets all the info they need to effect repairs and never gives any feedback. Hundreds out there like that.

                          Account deleted.

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