brewcrew Posted March 16 Share Posted March 16 I’ve got a 706 I’m trying to get running following a head gasket replacement. I’ve got the electrical sorted well enough to run, and replaced the three glow plugs that tested bad. I’ve got fuel at each injector line with them off, so I went ahead and tightened the lines down. I’ve got a pair of 12 volt batteries, plus jumper cables from my semi with four more batteries. (All hooked properly for a 12 volt system). She cranks well for 5-15 seconds at a stretch, then slows a bit. But I can’t get so much as a puff of smoke from the exhaust. I let the glow plugs cool and tried some ether, but it didn’t really change anything with how it cranked until I was using too much, then it started cranking a bit harder. Any tips on getting it to fire? I’m starting to think a new starter might be in order. I have a rebuilt one here from a gas 706, would that be better than a weak one from a diesel? Both batteries in the tractor are solid, one being brand new. All battery cables are good quality and fairly new. Prior to the head gasket it was actually blowing out the intake, so I never heard it run. But it does seem to have suction on the intake this time, so that’s an improvement! Quote Link to comment Share on other sites More sharing options...
MarkG Posted March 16 Share Posted March 16 I have a 656 with the 282. It cranked and ran great until I let it sit over the winter. Then it would not crank up. My solution was to put an electric pump in line supplying fuel to the injection pump. Yes I changed the fuel filters first and verified that I had good fuel flow to the pump first. But for some reason the injection pump would not pump properly. After I put the electric pump on the supply fuel line I would run it to get the tractor cranked then switch it off and the injection pump would suck the fuel through the pump with the pump off and run fine. Mine was a rebuilt pump with very few hours on it. Not sure why the injection pump had such a hard time starting. Maybe the injection pump shop did something wrong when they rebuilt it. I’m not sure if this applies to your situation or not. But it’s relatively cheap to try. I used a couple ends I cut off another steel line to adapt rubber hose to and run the hose to a cheap 12 volt pump. @Injpumped will have better info for you. Good luck. Mark Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted March 16 Share Posted March 16 Never had issues priming them engines myself if your getting diesel fuel is up to the injectors it should be smoking or trying to start Good luck Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted March 16 Share Posted March 16 advance timing a bit? crank with valve cover off and observe for something amiss pull start to increase engine speed if you think slow crank is a possibility.... Quote Link to comment Share on other sites More sharing options...
brewcrew Posted March 16 Author Share Posted March 16 26 minutes ago, nomorejohndeere said: advance timing a bit? crank with valve cover off and observe for something amiss pull start to increase engine speed if you think slow crank is a possibility.... Since it has a ta, pull starting is not an option. Quote Link to comment Share on other sites More sharing options...
rustred Posted March 16 Share Posted March 16 11 hours ago, brewcrew said: I’ve got a 706 I’m trying to get running following a head gasket replacement. I’ve got the electrical sorted well enough to run, and replaced the three glow plugs that tested bad. I’ve got fuel at each injector line with them off, so I went ahead and tightened the lines down. I’ve got a pair of 12 volt batteries, plus jumper cables from my semi with four more batteries. (All hooked properly for a 12 volt system). She cranks well for 5-15 seconds at a stretch, then slows a bit. But I can’t get so much as a puff of smoke from the exhaust. I let the glow plugs cool and tried some ether, but it didn’t really change anything with how it cranked until I was using too much, then it started cranking a bit harder. Any tips on getting it to fire? I’m starting to think a new starter might be in order. I have a rebuilt one here from a gas 706, would that be better than a weak one from a diesel? Both batteries in the tractor are solid, one being brand new. All battery cables are good quality and fairly new. Prior to the head gasket it was actually blowing out the intake, so I never heard it run. But it does seem to have suction on the intake this time, so that’s an improvement! i would say you need a starter these engines as with any diesel engine must spin fast or she will not start. is it turning fast? plus leave the lines cracked till the fuelis dripping out of each one tighten them as the fuel drips out. is the timing set???you sure dont need 6 battery's to start that. 2 good batt's in parallel is lots. with fuel and timing set and glow plugs for 30-45 sec it should start in 2 revolutions , basically as soon as you hit the starter. your really testing your head gasket with starting fluid, throw that away. so till you verify vales are set to .027 , it is timed correctly it think 5 degree's btdc. thats what the 660 282 is. fuel to injectors , glow plugs working, starter spinning at rated rpm, houston u have a problem yet. also was this tractor running before u took it apart??? just verify and set the timing... there is no need to be playing with it once it is set. be sure of your work. 1 Quote Link to comment Share on other sites More sharing options...
brewcrew Posted March 16 Author Share Posted March 16 33 minutes ago, rustred said: i would say you need a starter these engines as with any diesel engine must spin fast or she will not start. is it turning fast? plus leave the lines cracked till the fuelis dripping out of each one tighten them as the fuel drips out. is the timing set???you sure dont need 6 battery's to start that. 2 good batt's in parallel is lots. with fuel and timing set and glow plugs for 30-45 sec it should start in 2 revolutions , basically as soon as you hit the starter. your really testing your head gasket with starting fluid, throw that away. so till you verify vales are set to .027 , it is timed correctly it think 5 degree's btdc. thats what the 660 282 is. fuel to injectors , glow plugs working, starter spinning at rated rpm, houston u have a problem yet. also was this tractor running before u took it apart??? just verify and set the timing... there is no need to be playing with it once it is set. be sure of your work. I never heard the engine run, as I bought it with a bad head gasket. It was supposed to have ran just fine. The pump had been rebuilt and within a short time the head gasket failed. I can look at pump timing. I for sure have fuel at all six injectors. I’m just surprised I don’t have even a whiff of smoke trying to start it. It’s been 20 years since dad had a 656 with this engine, but I recall it smoking like crazy. Quote Link to comment Share on other sites More sharing options...
Tobaccoman Posted March 16 Share Posted March 16 Check fuel shutoff. Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted March 16 Share Posted March 16 Anytime there's a major engine repair its wise to go thru all the settings Valve lash adjustment , injector pump Timing , Fuel condition and filters also 1 Quote Link to comment Share on other sites More sharing options...
brewcrew Posted March 16 Author Share Posted March 16 8 minutes ago, ksfarmdude said: Anytime there's a major engine repair its wise to go thru all the settings Valve lash adjustment , injector pump Timing , Fuel condition and filters also Fuel is fresh. I pulled the tank with enough fuel in it that it slipped and nearly cost me my pinky finger. So that old fuel all got used in a heater, and I started with fresh. 1 Quote Link to comment Share on other sites More sharing options...
rustred Posted March 16 Share Posted March 16 49 minutes ago, brewcrew said: Fuel is fresh. I pulled the tank with enough fuel in it that it slipped and nearly cost me my pinky finger. So that old fuel all got used in a heater, and I started with fresh. while its a good idea to use fresh fuel, but i have started my 560 after sitting 30 years with a full tank of old diesel. it even had the old diesel smell. if no algea its not the fuels fault. and if the shut off was shut off you would have no fuel at all coming. they do not smoke much on start up when things are all correct and working. you will have about 10 seconds of smoke. my concern is it cranking fast enough... one of most important things also. dont know how you are trying to start it either. ok, hold glow plug button for 45 seconds the push starter button at the same time do not release glow plug button. after starting keep holding button for a few seconds till smoke is gone. and have 3/4 throttle to start once it starts release throttle to 900 rpm. reading story's is not like being there with eyes on the subject. i gave the spec's and what to look for so then that should be all verified ,... then you come back and give your info what you have done and found. what else can i say. AND u did not hear the engine run is the most important fact. check it all as you put the head gasket in got no info to any of them spec's, i dont know what u know, then people get pissy why asking questions, well its part of diagnosing your problem. if i am stuck in the great white north and i phone to my office with a problem i cant find , the policy is to list everything in order you have done and give all spec's before calling in. how else would they give me info.? if i just said engine wont start that would be an azz chewing. 1 Quote Link to comment Share on other sites More sharing options...
R190 Posted March 16 Share Posted March 16 did you have the pump off? Maybee its 180 out of time if you did. Quote Link to comment Share on other sites More sharing options...
Injpumped Posted March 16 Share Posted March 16 No smoke means no fuel getting through the injectors. My bet is the plungers are stuck in the pump and you're just seeing transfer pump fuel at the ends of the lines. Sounds like it's been sitting a while. Good luck! Quote Link to comment Share on other sites More sharing options...
brewcrew Posted March 16 Author Share Posted March 16 1 hour ago, Injpumped said: No smoke means no fuel getting through the injectors. My bet is the plungers are stuck in the pump and you're just seeing transfer pump fuel at the ends of the lines. Sounds like it's been sitting a while. Good luck! The fuel dribbled from each line in rotation. No fuel through the injectors is my worry. What could I check to confirm or deny that issue? Is there a fix other than sending the pump and injectors in for a rebuild ? Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted March 16 Share Posted March 16 tap around on it Quote Link to comment Share on other sites More sharing options...
Injpumped Posted March 16 Share Posted March 16 The injectors are so simple, I've never seen these ever stick shut, to not allow the pump to blow fuel through them. This is an injection pump issue. It's coming out in sequence because the rotor is going around the firing order, just dripping out transfer pressure. It will give a false sense that it's actually pumping fuel. Take lid off to make sure it's not just a stuck closed metering valve. 2 Quote Link to comment Share on other sites More sharing options...
Diesel Doctor Posted March 17 Share Posted March 17 Always start the pump diesels with the throttle wide open. The computerized diesels either start, or they won't, at any throttle position. You want to give the engine all the fuel you can. Then throttle back as the engine starts to run. Injpumped knows what he is talking about. Quote Link to comment Share on other sites More sharing options...
iowaboy1965 Posted March 17 Share Posted March 17 Listen to injpumped. opps you said 706 I thought we were talking 656. Never mind about my ta comment. My apologies. 1 Quote Link to comment Share on other sites More sharing options...
snowman656 Posted March 17 Share Posted March 17 Try taking the return line off of the pump and then try starting it. If there is a restriction in the return line it will not let the pump push any fuel. Quote Link to comment Share on other sites More sharing options...
Nebraska1206 Posted March 17 Share Posted March 17 I've had luck taking a ball peen hammer, and lightly tapping on the head of the injection pump, in between the banjos where the injection lines connect to the head of the pump, and having that free up a stuck plunger. Did that on a 1206 that had sat in a salvage yard for many years, and it fired right up (also found why it was condemned to the salvage yard....) 1 Quote Link to comment Share on other sites More sharing options...
rustred Posted March 17 Share Posted March 17 21 hours ago, brewcrew said: The fuel dribbled from each line in rotation. No fuel through the injectors is my worry. What could I check to confirm or deny that issue? Is there a fix other than sending the pump and injectors in for a rebuild ? ok, ... so when cranking the fuel will shoot out of the lines not dribble. will shoot out a good 3 feet! never ever put your finger over the end of the line. you will get diesel poisoning. i can shoot the diesel right into your skin!! so if you have a dribble its pump trouble. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.