Help! Can't get injector pump primed

[Jerry/MT]

Re: Help! Can\'t get injector pump primed

Ok our haying partners have a Case/IH 585, yesterday one of them finished tedding and noticed the tractor felt slugish so stopped it.

She asked me to take a look at it and it was out of fuel (saddle type tank with a bad transfer line so it looks 1/2 full on the filler side)

So I put some fuel in it and ended up replacing the fuel filters, blowing out the line to the tank etc to get fuel to run out the last drain.

I cracked all the lines to the injectors at the injectors and cranked away but nothing would come out! It has a Bosch pump and I don't see a priming pump lever to save cranking.

Please help!
Ken

You always start by openingthe tank valve and then opening the bleed screw on the filters) to get all the air out of the filter(s). When no more bubbles come out of the bleeder screw, just straight fuel, close it. then bleed the pump. Same thing; straight fuel, no bubbles. Then you crack the injectors and crank untill you have fuel there and then close them. I do it one at a time rather than all at the same time but that's your choice. The deal is to get 99.9% of the air out of the lines before you close them off.

 

[slowzuki]

Re: Help! Can\'t get injector pump primed

If you remove the supply line from the tank to the filter block at the banjo fitting (its a loop with a bolt through it) and no fuel comes out when the rear tank is full, the line from the tank is clogged. The fast way is to put compressed air back through the line to the tank.

BEFORE that, check the fuel level. The tank is a saddle shape with a transfer line between the two bottom sumps. This transfers line is almost always clogged. The suction is not on the same side as the filler and level sender, so the suction side can be empty, while looking in the filler neck, there seems to be lots of fuel.

Next is the fuel shut off valve at the bottom of the tank, someone may have closed it. I can't remember which way is open, but half way will let fuel come the banjo fitting at the filters quite well. Then you can quickly determine off or on.

 

[Jayfish]

Re: Help! Can\'t get injector pump primed

Ok so once that is all good and fuel is flowing out of front banjo on filters then is there anything else that need to be done to the actual injector pump, as far as bleeding air in the pump, not at the injectors cause I have done all that, Im just use to a primer pump pumping fuel all the way to the injector pump. Thanks

 

[Jerry/MT]

Re: Help! Can\'t get injector pump primed

If you remove the supply line from the tank to the filter block at the banjo fitting (its a loop with a bolt through it) and no fuel comes out when the rear tank is full, the line from the tank is clogged. The fast way is to put compressed air back through the line to the tank.

BEFORE that, check the fuel level. The tank is a saddle shape with a transfer line between the two bottom sumps. This transfers line is almost always clogged. The suction is not on the same side as the filler and level sender, so the suction side can be empty, while looking in the filler neck, there seems to be lots of fuel.

Next is the fuel shut off valve at the bottom of the tank, someone may have closed it. I can't remember which way is open, but half way will let fuel come the banjo fitting at the filters quite well. Then you can quickly determine off or on.

The problem with blowing back o the supply line to the filter is you blow the stuff that caused the blockage back into the fuel tank. The tank really needs to be draineed and the crud cleaned out or it's just going to keep happening and usually right when you'r doing something critical (Murphy's law).

 

[Jayfish]

Re: Help! Can\'t get injector pump primed

Well I figured it out lines had some major buildup of some kind of tar or something. It was clogged even though the other day I was getting air through line - so now i am getting good fuel to filters and to pump but I still can't get anything out of the pump - I took off lines on rear of pump and crank. - nothing - the shut off on tractor is off so it's not that. Think whatever was in the lines ruined the pump too. I took off side plats and the shaft is spinning so it's not stripped or something - So now I am in process of removing pump. What a pain. Thanks all for the help

 

[slowzuki]

Re: Help! Can\'t get injector pump primed

Jayfish! Before you remove the pump get a manual!!!!!!! You can cause major problems if you don't follow the proper procedure of locking shafts etc.

Even if you have the throttle wide open, at cranking speed, very little fuel comes out of the pump. When you say you took the lines off the pump, you mean the injector lines?

 

[Jayfish]

Re: Help! Can\'t get injector pump primed

I Took lines off at back of injector pump. And when crank nothing comes out not a drip. I have started taking it off but have stopped at unbolting from gear on front on pump , I took the panel off front cover and can see the 3 bolts and another center bolt. I have not un did those. I am pretty sure whatever was in the fuels system clogged up the pump or messed up the vanes maybe. I am going to get a book for it. I know you have to keep them in time with motor I was hoping the pump had a keyway on shaft that way you can't get it out of time but I don't know if it does. So that's where I am at.

 

[banjodunn]

G'day don't undo the centre bolt or you will be is strife you need to undo the 3 bolts . When you say the stop control was off you do mean in the run position right? Good idea to get a book for it this may show you something we may have missed, let us know how you get on.



Jon

 

[Jayfish]

Yeah the lever is in run position - I'm pretty sure whatever was in the lines contaminated the pump and plugged a check valve or something. I am getting a manual for it and then I think I might have a go at the pump too. What's the worst that can happen now. I work with precision stuff alot since I'm a full time machinist so I think I can handle the tear down. If not then I will send it off or just buy one. Thanks all. I'll keep you all informed.

 

[banjodunn]

G'day not saying you can't do it but to set up an inj pump req it putting on a bench and calibrating the output, it has to be equal or you will get one cyl running harder/slacker than the rest. It is a job best left to the experts there is a guy on here called dieseltech and he offers alot of advice and from what I understand a postal service recoing your inj pump, might be worthwhile digging him up.


Jon