John deere 30series injectors

[ashmore]

We have a JD 7530. And after hearing of a few local that have had to be majorly rebuilt after injector faults have wrecked the engine, I'm trying to decide if we should bite the bullet and get them seen to.
By all accounts the injectors turn into flame throwers and burn the top of the pistons, which end up going through the cylinder head and turbo etc.
Can common rail injectors be tested?
Is it worth talking to a specialist diesel firm? Is it possible to refurbish mine? I have priced up JD reman injectors at £344.17, and they'll need to be reprogramed. Which, to me, is a big expense. So I want to be sure. The tractor has done 7500k hours. And I will be honest, it does sound noisy when cold. But we want to keep it for at least another 5 yrs. Thanks all.

 

[Farmer Bob]

Replaced the injectors on ours a year ago. Constant running rough and power derating even in light work before it was done. Really notice a difference in performance and glad we got it done. Hope to keep it for a while too. Expensive repair, but if it needs done it needs done in my opinion.

 

[Mark C]

30 series sound rough when cold as they overfuel until up to temperature. We had a 7530 and had the EGR deleted and a mild remap by derv doctor. It ran a lot cooler and no cold knocking at startup after that. .
I just bought a used 6920s and it had a thorough health check at the dealer. On the dyno it was throwing up an error code and too much fuel was leaking off the common rail, diagnosis , worn injectors. Would be with getting it checked out.

 

[SteveO]

Injector rebuild cost 120€ excl. VAT in Croatia. Get them repaired, I have done 50 and all of them were fine and changed the noise a lot even when cold.

 

[Serup]

I have two us build 7030 series tractors.
they are at 8000 and 9000 hours now. Both had injectors within the last 6 month. The both had codes at continous full load for some time. Rail pressure if i remember correct. It’s because they leak too much, so the pump can’t keep the requested pressure. The one at 9000 hours has thrown codes for a few years at shorter and shorter intervals. It was smoking white at the end and i was told it could burn the piston, and change the repair cost dramatically. If you don’t have any codes, i would continue using it.

 

[Bloders]

can you do a leak off test?
Seems as though that will indicate their condition?

 

[Farmer_Joe]

im not sure you need them coding, ive an audi that ive got second hand injectors for, the codes are fine tuning from rebuilds/new to help the ecu, so if you fit new injectors 'idealy' for optimum running you tell the ecu these codes.

i can fit new injectors and not code them no issue, it could be different on the jd but i suspect its the same.

if you done fair hours with no shadow of a doubt i would get them sorted, far better than burned pistons and white smoke (my audi is giving white smoke smelling of deRv on tickover HENCE ME CHANGING THEM), if left for ages in car engines it will do the same and burn pistons.

 

[Serup]

can you do a leak off test?
Seems as though that will indicate their condition?

My dealer said they did that. They had a max amount it could leak to be within spec, and they where all over.
What they really did for all the money they wanted, i don’t know. But they are error-free now.

 

[Bloders]

My dealer said they did that. They had a max amount it could leak to be within spec, and they where all over.
What they really did for all the money they wanted, i don’t know. But they are error-free now.

Do you think the injectors will last the tractor in your possession?
Probably not if they are already out of spec. Therefore your going to have to replace them.
I then take the approach that if i am more than half way through the life of the tractor, may as replace them sooner than later?

 

[Serup]

Do you think the injectors will last the tractor in your possession?
Probably not if they are already out of spec. Therefore your going to have to replace them.
I then take the approach that if i am more than half way through the life of the tractor, may as replace them sooner than later?

I had them changed on my tractors, because of the codes and the possible consequences of not doing it.
I wouldn't change them before the tractor gives any codes. It will give "low rail pressure" codes under full load, way before they stop working.

 

[kiwi pom]

We have a JD 7530. And after hearing of a few local that have had to be majorly rebuilt after injector faults have wrecked the engine, I'm trying to decide if we should bite the bullet and get them seen to.
By all accounts the injectors turn into flame throwers and burn the top of the pistons, which end up going through the cylinder head and turbo etc.
Can common rail injectors be tested?
Is it worth talking to a specialist diesel firm? Is it possible to refurbish mine? I have priced up JD reman injectors at £344.17, and they'll need to be reprogramed. Which, to me, is a big expense. So I want to be sure. The tractor has done 7500k hours. And I will be honest, it does sound noisy when cold. But we want to keep it for at least another 5 yrs. Thanks all.

If you're going to keep it and you suspect problems have the work done. What's your local dealers reputation or do you know of a good mechanic who regularly works on these engines? It might need more than just the injectors on the other hand they might not be a problem.
If the rest of it's in good condition, going through the engine would probably be a good investment. Find a good mechanic.