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Thread: Ford New Holland 8340 SLE help thread

  1. #241
    JimF
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    Re: Ford New Holland 8340 SLE help thread

    Back in our 7840 days we had the earliest one our local dealer sold. It was very reliable except two small problems mentioned above.
    PTO not working and couldn't find a fault for ages. In the end it was the alternator which we never realised was connected somehow to the PTO.

    Other difficult problem to sort was flat battery and starting difficulties. It even nearly had our local NH dealer beat. They took it to an Auto-electrical specialist in the end. They were beat too.
    Dealer got it back and it was sitting in their workshop and all of a sudden gearbox lights lit up when everything was turned off. It turned out it was doing this through the night and flattening the battery. Dodgy 17 relay was the cause after spending many hundreds on time, batteries and starter motors.

  2. #242
    Rme639
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    Re: Ford New Holland 8340 SLE help thread

    Im at a los with starting issuses. Bats disconected overngt , all conenctions appear fine, starters geuine nh, tractors luky if dun 50 hrs since fitted. When its not icey starts 1st time

  3. #243
    essexpete
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    Re: Ford New Holland 8340 SLE help thread

    Guess what our twin battery 83 would not start am Just not enough punch. Boost and instant start. I think the starters need checking on these old things at this point, assuming that the terminals and earth are sound.

  4. #244
    Ploughman1963
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    Re: Ford New Holland 8340 SLE help thread

    I ran a live from the battery to the PTO switch and sent the driver with another spare blue relay just in case. Hasnt missed a beat all day so will investigate further when we have more time - busy hedgecutting whilst we have frost in the ground

    Thanks all

  5. #245
    tiptop
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    Re: Ford New Holland 8340 SLE help thread

    well it must be a faulty starter motor, not all new stuff work as it should new or not, id get another starter and try cos if battery / batterys are good and no wires getting hot then cant be much else,

  6. #246
    Rme639
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    Re: Ford New Holland 8340 SLE help thread

    I waS moving 8340 in yard when it stoped,, a fuel pipe goin in to the fuel filter hAd came off. Filed up filter wi diesel n pumped up lift pump but stil not start. Any tips welome

  7. #247
    agrimax
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    Re: Ford New Holland 8340 SLE help thread

    After bleeding the filter at the primer,did you slacken off the injector pipes and crank it over?

  8. #248
    Rme639
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    Re: Ford New Holland 8340 SLE help thread

    I didnt. Shall do that tomorw. Do u mean at the injectors themselfs?

  9. #249
    agrimax
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    Re: Ford New Holland 8340 SLE help thread

    Yes.You can try loosening no.1 at the fan end and crank.Normally would be enough but if not, slacken 1 to 4 and crank until fuel is present.Without looking at my own,I think 5 and 6 are hard to get at because of the air filter.One is normally enough.Don't forget to tighten it again when she's running.

  10. #250
    essexpete
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    Re: Ford New Holland 8340 SLE help thread

    The first time I changed the fuel filter on ours the front tank was empty and I did not shut of the tap near the filter. I had a difficult job priming up to the filter with the hand pump and resorted to pulling it through with a small hand pump designed for pulling oil out of a diptick hole.

  11. #251
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    Re: Ford New Holland 8340 SLE help thread

    Sorry to resurrect this yet again. I still have the intermittent bleep as though there is low brake fluid. Have now noticed that sitting on and off the seat appear to have an effect on problem. Do the circuits to seat pump and h/b warning light have any common link or earth? I suppose the there could be a wire chaffed under the thick mat somewhere?
    Peter

  12. #252
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by essexpete View Post
    Sorry to resurrect this yet again. I still have the intermittent bleep as though there is low brake fluid. Have now noticed that sitting on and off the seat appear to have an effect on problem. Do the circuits to seat pump and h/b warning light have any common link or earth? I suppose the there could be a wire chaffed under the thick mat somewhere?
    Peter

    Did the 40 series have a seat pressure switch?? I can't recall if the 60 series did, the TM's do. Prongy might know? If the 40 series loom to the handbrake runs under or near to the floor where the seat is mounted it could be a pinched wire possibly.


    ff

  13. #253
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    Re: Ford New Holland 8340 SLE help thread

    Apparently no press switch so I guess I have to take out the poxy seat.

  14. #254
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    Re: Ford New Holland 8340 SLE help thread

    After realising that rocking the cab seemed to affect the problem had the floor out to see if any wires chaffed under there. Could not find any thing and while sitting on the seat had another fiddle with the connector near the handbrake. School boy error, thought I had eliminated the connector it but that is where the problem lay. The electrics do look very William H_R on these tractors.

  15. #255
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by essexpete View Post
    After realising that rocking the cab seemed to affect the problem had the floor out to see if any wires chaffed under there. Could not find any thing and while sitting on the seat had another fiddle with the connector near the handbrake. School boy error, thought I had eliminated the connector it but that is where the problem lay. The electrics do look very William H_R on these tractors.
    Well at least its been cleaned out under the mat now then! Not sure what type of connector was the problem, but many now are streets ahead of what was being used back when your 40 series was drawn up, but often its a connector/connection to blame.

    well done


    ff

  16. #256
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    Re: Ford New Holland 8340 SLE help thread

    hi got a 1994 7740 sl with a hyd problem it will tip a trailer fine but lift is slow. it has twin assister rams, and will lift 4 furrow , 3m combi but very slow any ideas what could be the problem?

  17. #257
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by 7740 pilot View Post
    hi got a 1994 7740 sl with a hyd problem it will tip a trailer fine but lift is slow. it has twin assister rams, and will lift 4 furrow , 3m combi but very slow any ideas what could be the problem?

    Only dabbled with 8340SLE's here, but having had a look on the CNH parts site I see that the 7740 has options for both the CCLS load sensing pump and a twin gear pump with engine mounted auxiliary pump. Your symptoms sound like the 10 series. Do you have the gear pumps on the back end and the engine mounted pump? if you do there will be a 3 spool valve on top of the hyd lift cover? My money will be on the main pump on the rear axle is worn, this supplies the lift linkage whereas the engine mounted pump will supply the spools. The spool valve block combines the oil flow in some situations, but it also controls the pressure of the remote spool valves, hence the spools will be ok but the lift arms poor.

    Sounds like you will need a new pump

    ff

  18. #258
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by Footsfitter View Post
    Only dabbled with 8340SLE's here, but having had a look on the CNH parts site I see that the 7740 has options for both the CCLS load sensing pump and a twin gear pump with engine mounted auxiliary pump. Your symptoms sound like the 10 series. Do you have the gear pumps on the back end and the engine mounted pump? if you do there will be a 3 spool valve on top of the hyd lift cover? My money will be on the main pump on the rear axle is worn, this supplies the lift linkage whereas the engine mounted pump will supply the spools. The spool valve block combines the oil flow in some situations, but it also controls the pressure of the remote spool valves, hence the spools will be ok but the lift arms poor.

    Sounds like you will need a new pump

    ff
    thanks FF

    yes engine mounted pump and gear pump on the side of the trans. rite is there any other way of testing it other than the "lift is slow" any pressures? also is it much of a job to change?

  19. #259
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    Re: Ford New Holland 8340 SLE help thread

    Have a look here at the sparex site where there are two pictures of said pump

    http://v2.gb.sparex.com/ItemDetails/...esultCriteria=

    Does the outside view look like yours?? If thats the one (never seen or worked on one!) then its the 40 series version of the 10 series pump, a standard gear pump for the hydraulics and a smaller piggy back pump for the low pressure hydraulics in the gearbox.

    The usual problem will be the gears run in plain bearings/bushes which wear and the gear "mills" away the alloy pump housing making a nice big escape route for the oil to slip by................hence the lift pressure dropping.

    I'd guess its the same as the 10 series and there may be an adaptor required to tap into the pipework between this pump and the combining valve, with this in place if you have access to a flow meter its a simple matter to test the pressure the pump makes off load, then when the pressure is applied (you restrict the oil flow with a needle valve) when they are bad you can get the pressure but with zero flow, hence no lift!! this is where a simple pressure gauge isn't quite as good to diagnose with.

    I don't know what the pump pressure should be for the 7740, but I bet if you stick a gauge in the spools and test it there, then disconnect one assister ram hose and stick the gauge in there you will get a lot less pressure on the assister ram.

    You can visually diagnose the pump if you take it off and strip it down. When you have removed the internal gears, look at the play between their shafts and the bushes in the figure 8 shaped alloy blocks, then have a look inside the alloy pump housing, you will see the gears have machined a slot on the suction side where the oil pressure has pushed the gears as their bearings wear into the housing where the teeth "mill" the slot. If you can hook a finger nail in it then the pump is really only scrap.

    Usually the best place for a replacement is whitehouse hydraulics where they are normally stock for these sort of things. Fitting it will be oil out (unless nearly new, replace it with fresh), remove pipework, remove pump, fit new pump along with filter and a new one on the engine pump too.

    ff

  20. #260
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    Re: Ford New Holland 8340 SLE help thread

    ok thanks ff that's helped a lot i will have ago at it tomorrow if i get time
    thanks again for your help its very much appreciated and will let you know what i find

    sid

  21. #261
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    Re: Ford New Holland 8340 SLE help thread

    Back to this old junk again!! 8240 SLE that is.
    When first started from cold,gears 1-4 select fine.Lever foward to 5 and the dash stays at 4 but the box goes to 8 and the buzzer sounds with a code displayed.Forget what it is at the minute. Clutch down,back to 4.Back foward to fifth with clutch down and wait 5 -20 secs and it goes to 5.It has been doing this for some time now and usually only does it after sitting cold.Once 5 is engaged once,it works fine all day.The f/r synchro is about knackered --again-- but I don't think thats relevant to the other issue. Anyone came across this before? Would like to know what is causing the selection issue when cold, before opening the box to replace the synchro hub,as it could be more sensible to get shot of the whole thing as is.

  22. #262
    Senior Member prongy's Avatar
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by agrimax View Post
    Back to this old junk again!! 8240 SLE that is.
    When first started from cold,gears 1-4 select fine.Lever foward to 5 and the dash stays at 4 but the box goes to 8 and the buzzer sounds with a code displayed.Forget what it is at the minute. Clutch down,back to 4.Back foward to fifth with clutch down and wait 5 -20 secs and it goes to 5.It has been doing this for some time now and usually only does it after sitting cold.Once 5 is engaged once,it works fine all day.The f/r synchro is about knackered --again-- but I don't think thats relevant to the other issue. Anyone came across this before? Would like to know what is causing the selection issue when cold, before opening the box to replace the synchro hub,as it could be more sensible to get shot of the whole thing as is.
    Sounds like a sticking status switch. If you can get the code it might confirm. Top of the box, under the fllor plate. Either side of the safety start switch. If the processor doesn't knw you have changed from 4th it won't engage 5th. Hence going to top. Might work with a clean up otherwise shouldn't be too expensive and easy to fit.

  23. #263
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    Re: Ford New Holland 8340 SLE help thread

    Hi Prongy.The code is E14. I see that is 1-5 and 5-8 switches both on. Is that likely to be the gear switches at fault or the status switch? Also difficult to get N on the dash now,for starting but if I pull the f/r lever back beyond reverse,N comes up and it will start! Have checked out the neutral start switch and it is fine.Also noted that with the small cover off the top off the box,when moving the f/r lever,instead of just the sliding collar moving,the whole synchro hub is trying to go back or foward. Would this suggest a worn or missing thrust washer to the rear of the hub? Forgot to say that it is a prequad model btw.Ta.

  24. #264
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    Re: Ford New Holland 8340 SLE help thread

    Got an 8340 with loader. It has started, when cold to make a nasty droney/wine noise from the back end when i lift or tilt the loader first thing, it is very slow too, but when it has warmed up it is fine again, but maybe a bit slower than it used to be. just started doing it last few day's

    The oil is up to level and the usual 10-30 universal type used...could it just need a filter? wasn't changed that long ago, 8 months ish..and not over used compared to some.

  25. #265
    Senior Member prongy's Avatar
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by agrimax View Post
    Hi Prongy.The code is E14. I see that is 1-5 and 5-8 switches both on. Is that likely to be the gear switches at fault or the status switch? Also difficult to get N on the dash now,for starting but if I pull the f/r lever back beyond reverse,N comes up and it will start! Have checked out the neutral start switch and it is fine.Also noted that with the small cover off the top off the box,when moving the f/r lever,instead of just the sliding collar moving,the whole synchro hub is trying to go back or foward. Would this suggest a worn or missing thrust washer to the rear of the hub? Forgot to say that it is a prequad model btw.Ta.
    Gear switches?
    Can only be the status switches. Processor doesn't know what's going on so won't let you do anything to break the box. N is not showing because switch is sticking/faulty in 1-4 or 5-8 or both.
    Never been in a pre quad but assume (always bad to do) that they have the same polymide washers as quad mods do. A valid reason to shout loudly at people driving whilst holding the gear levers as the pressure wears them away.

  26. #266
    Senior Member prongy's Avatar
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by ovinebov1ne View Post
    Got an 8340 with loader. It has started, when cold to make a nasty droney/wine noise from the back end when i lift or tilt the loader first thing, it is very slow too, but when it has warmed up it is fine again, but maybe a bit slower than it used to be. just started doing it last few day's

    The oil is up to level and the usual 10-30 universal type used...could it just need a filter? wasn't changed that long ago, 8 months ish..and not over used compared to some.
    Have you checked the filters are tight? Sounds like an air leak and the pump is cavitating on start up.
    If they are tight, try a bit more oil in the back. If the problem is on the suction side of the pump the extra oil will immerse the pipe fully. Give you a direction to look in.

  27. #267
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    Re: Ford New Holland 8340 SLE help thread

    Thanks Prongy.Removed the status switches and both tested ok on the bench with a bulb. Put them in again and things seem ok. So,didn't actually change or do anything!! Won't know for sure if it's ok til the morning. Have played with the neutral switch before and could find nothing wrong with it.Pushing the ball out and in made bulb go off and on while bench testing. Decided to skim a tiny amount off the switch body on the lathe ,to allow it to screw slightly further into the selector housing.That cured the N problem---until I nipped the switch up tight.. Outer part wrung off.New switch fitted and now working as it should.Old switch must have had worn contacts after all.
    Just the major crunching to sort out now.....or get rid of the damned thing!

  28. #268
    Senior Member prongy's Avatar
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by agrimax View Post
    Thanks Prongy.Removed the status switches and both tested ok on the bench with a bulb. Put them in again and things seem ok. So,didn't actually change or do anything!! Won't know for sure if it's ok til the morning. Have played with the neutral switch before and could find nothing wrong with it.Pushing the ball out and in made bulb go off and on while bench testing. Decided to skim a tiny amount off the switch body on the lathe ,to allow it to screw slightly further into the selector housing.That cured the N problem---until I nipped the switch up tight.. Outer part wrung off.New switch fitted and now working as it should.Old switch must have had worn contacts after all.
    Just the major crunching to sort out now.....or get rid of the damned thing!
    Could have been some crud in the detent of the selector rail? Stopping the ball on the switch dropping into the rail to allow her to start?

  29. #269
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by prongy View Post
    Have you checked the filters are tight? Sounds like an air leak and the pump is cavitating on start up.
    If they are tight, try a bit more oil in the back. If the problem is on the suction side of the pump the extra oil will immerse the pipe fully. Give you a direction to look in.
    Thanks for that, i filled it up with a bit more oil just over the max on the stick, it has improved it its not as noisy but still making some noise, and a bit quicker on moving, have mechanic coming out tomorrow as loader cable has gone so will get him to look, hes bringing a filter just in case.
    thank you for your help

  30. #270
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    Re: Ford New Holland 8340 SLE help thread

    Quote Originally Posted by ovinebov1ne View Post
    Thanks for that, i filled it up with a bit more oil just over the max on the stick, it has improved it its not as noisy but still making some noise, and a bit quicker on moving, have mechanic coming out tomorrow as loader cable has gone so will get him to look, hes bringing a filter just in case.
    thank you for your help
    Did the mechanic find something? I have a 7840 SLE with Trima front loader, and I have the same agonizing sound when operating the front loader when oil/weather is cold.

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