Oliver 88 Injection Pump

[88dieselboy]

I recently purchased my first tractor, which is an Oliver 88 Diesel. It does not run, and I think that it has issues with the injection pump because no fuel comes out after the pump. One thing that I noticed that is odd on the pump is a bolt loaded with a bunch of nuts (SEE IMAGE). Any ideas why this would be or next steps for trouble shooting?

 

[scootergmc]

I hope you did your homework on those Bosch PSB pumps prior to purchasing it. I don't know what that array of nuts is, but if that tractor didn't run for a long time and someone tried to start it, chances are good the plunger was stuck and it's now broken and the pump is a paperweight. If complete heads are available they're generally $800+ dollars. The plungers are machined to the head. If you didn't know about this beforehand, don't feel too bad, many people don't and end up in your (hopefully not) shoes. But maybe you got lucky. You could try disassembling the pump yourself or take it to someone you trust.

 

[Oliver owner]

I recently purchased my first tractor, which is an Oliver 88 Diesel. It does not run, and I think that it has issues with the injection pump because no fuel comes out after the pump. One thing that I noticed that is odd on the pump is a bolt loaded with a bunch of nuts (SEE IMAGE). Any ideas why this would be or next steps for trouble shooting?

Looks like someone put a bolt in there that is way too long and used nuts as spacers? These pumps are not too hard to take apart. There are other older threads on here about timing and removal. Could you give a little more detail about what you mean by no fuel coming out after the pump?

 

[88dieselboy]

I hope you did your homework on those Bosch PSB pumps prior to purchasing it. I don't know what that array of nuts is, but if that tractor didn't run for a long time and someone tried to start it, chances are good the plunger was stuck and it's now broken and the pump is a paperweight. If complete heads are available they're generally $800+ dollars. The plungers are machined to the head. If you didn't know about this beforehand, don't feel too bad, many people don't and end up in your (hopefully not) shoes. But maybe you got lucky. You could try disassembling the pump yourself or take it to someone you trust.

Hi scootergmc, thanks for the reply!

The tractor has been sitting in a shed for 12 years, but I bought it cheap enough that I am OK with putting some money into it. I have been having trouble finding any resources online about the American-Bosch PSB. How hard is swapping the head and is this all they generally need? I see several PSB-6A pumps from M35A2 military vehicles for sale on ebay if these are compatible.

 

[88dieselboy]

Looks like someone put a bolt in there that is way too long and used nuts as spacers? These pumps are not too hard to take apart. There are other older threads on here about timing and removal. Could you give a little more detail about what you mean by no fuel coming out after the pump?

You are probably right, maybe they lost the bolt and that's all that they had on hand.

I can crack the line going into the pump and see fuel coming out, but nothing after the pump head. Fuel doesn't leave the pump.

 

[Oliver owner]

Hi scootergmc, thanks for the reply!

The tractor has been sitting in a shed for 12 years, but I bought it cheap enough that I am OK with putting some money into it. I have been having trouble finding any resources online about the American-Bosch PSB. How hard is swapping the head and is this all they generally need? I see several PSB-6A pumps from M35A2 military vehicles for sale on ebay if these are compatible.

Jensales has a manual for the psb pumps.
Oliver66farmboy on YouTube has an older video about resealing a psb4 which is basically the same. I have all part #s for the orings to reseal them.

I think the military pumps have different fuel output rates. Dieseltech will correct me if I’m wrong.

 

[88dieselboy]

Jensales has a manual for the psb pumps.
Oliver66farmboy on YouTube has an older video about resealing a psb4 which is basically the same. I have all part #s for the orings to reseal them.

I think the military pumps have different fuel output rates. Dieseltech will correct me if I’m wrong.

Thanks Oliver Owner,

Jensales has two options, but the Allis-Chalmers one looks like it has more info if it's cross compatible. I will probably purchase one of these if it's possible to diagnose it myself. From what I have read from prior forums, this may be recoverable if the plunger is not broken. I found a forum explaining the removal/installation process on a super 66 if its the same for an 88.

 

[GermantownGreen]

Thanks Oliver Owner,

Jensales has two options, but the Allis-Chalmers one looks like it has more info if it's cross compatible. I will probably purchase one of these if it's possible to diagnose it myself. From what I have read from prior forums, this may be recoverable if the plunger is not broken. I found a forum explaining the removal/installation process on a super 66 if its the same for an 88.

Here's the shop that rebuilt our 880 pump.
Send it to them. It's worth your time, they're top notch. Very great quality.
GG Wes

 

[Oliver owner]

Thanks Oliver Owner,

Jensales has two options, but the Allis-Chalmers one looks like it has more info if it's cross compatible. I will probably purchase one of these if it's possible to diagnose it myself. From what I have read from prior forums, this may be recoverable if the plunger is not broken. I found a forum explaining the removal/installation process on a super 66 if its the same for an 88.

The process is the same. I have the allis-chalmers one. You don’t have to pull the pump off to remove the hydraulic head. I would just remove the head to see if the plunger is broke.

 

[JOCCO]

Ther is a guy on here, Diesel tech, He does pumps. You really need to be careful turning any old diesel over. (stuck pump). Some older diesel stuff is hard to get and expensive.

 

[GermantownGreen]

Ther is a guy on here, Diesel tech, He does pumps. You really need to be careful turning any old diesel over. (stuck pump). Some older diesel stuff is hard to get and expensive.

That right there is why I sent mine to Mylex. They had the guts to redo it top to bottom.
GG

 

[scootergmc]

That right there is why I sent mine to Mylex. They had the guts to redo it top to bottom.
GG

They had a head and plunger? Or did it not need one? They had the injectors I needed one time when nobody else did...

 

[GermantownGreen]

They had a head and plunger? Or did it not need one? They had the injectors I needed one time when nobody else did...

Didn't ask. Just paid the bill and they were great to deal with.
Too many people on here wanting to tear one of these ancient pumps apart, send it to a shop that is what they're for, do you go pulling your own teeth out, no you go to the dentist!
Just my thoughts... GG

 

[scootergmc]

Didn't ask. Just paid the bill and they were great to deal with.
Too many people on here wanting to tear one of these ancient pumps apart, send it to a shop that is what they're for, do you go pulling your own teeth out, no you go to the dentist!
Just my thoughts... GG

You said they had the guts to redo from top to bottom, but you don't know what it did/didn't need. Aside from their service, whether it needs a head and plunger is the biggest factor with the PSB pumps. Those parts are obsolete. Everything else can be sourced fairly easily. Your bill would've been in the four digits undoubtedly if it needed one and they had a set.

Now your position of whether the pumps should be serviced by the average joe, of course they can, but to each their own. I choose others as well, primarily because of experience and the necessary tools to get them tuned correctly.

 

[oliverkid]

You said they had the guts to redo from top to bottom, but you don't know what it did/didn't need. Aside from their service, whether it needs a head and plunger is the biggest factor with the PSB pumps. Those parts are obsolete. Everything else can be sourced fairly easily. Your bill would've been in the four digits undoubtedly if it needed one and they had a set.

Now your position of whether the pumps should be serviced by the average joe, of course they can, but to each their own. I choose others as well, primarily because of experience and the necessary tools to get them tuned correctly.

Last figure I heard was in the neighborhood of $3500 just to have a new plunger and metering sleeve made to match the head. And that was several years ago.

 

[scootergmc]

Last figure I heard was in the neighborhood of $3500 just to have a new plunger and metering sleeve made to match the head. And that was several years ago.

I've never actually known anyone who had a plunger and sleeve machined. That would be rough to have to fork that over.

 

[GermantownGreen]

I've never actually known anyone who had a plunger and sleeve machined. That would be rough to have to fork that over.

Yes the pump is almost worth more than the whole tractor. GG