Oliver 77 diesel

[Stanley996]

Hello. I am trying to get my Oliver 77 diesel to run. I’m getting fuel to the drip lines but it’s not going through the injector lines. Any help would be appreciated.

 

[Gambles]

“trying to get my diesel tractor to run….)
Quick question: How long has it sat?

 

[Stanley996]

“trying to get my diesel tractor to run….)
Quick question: How long has it sat?

I bought it a 4 years ago and the engine was stuck.

 

[scootergmc]

Did you check the injection pump?

 

[Stanley996]

Did you check the injection pump?

Did you check the injection pump?

The gear inside it turns what else would I need to check.

 

[Gambles]

The gear inside it turns what else would I need to check.

Injector pumps can seize when a diesel tractor sets, sometimes in as little as a year.
Replacement parts for some pumps are unavailable.
That's why I asked how long it as sat without running.

 

[rrlund]

Me thinks you broke the plunger.

 

[Stanley996]

Me thinks you broke the plunger.

Where’s the plunger located?

 

[trackrat]

Those pumps are very hard to get serviced they are almost no parts for them, I have three of them none will run, don't know what I will do about them. plunger is internal in pump

 

[Stanley996]

Those pumps are very hard to get serviced they are almost no parts for them, I have three of them none will run, don't know what I will do about them. plunger is internal in pump

Is there anyway to check the plunger while it’s still in the tractor

 

[Gambles]

Is there anyway to check the plunger while it’s still in the tractor

There’s a guy on these forums who goes by: Dieseltech. He rebuilds injector pumps. My advice would be to get the year if your tractor, tell him the brand of your injector pump and send him a private message.

 

[Oliver owner]

Is there anyway to check the plunger while it’s still in the tractor

I was just working with another guy on here diagnosing the same thing.

https://forums.yesterdaystractors.com/direct-messages/psb6a-follow-up.5882/#convMessage-19892

 

[Stanley996]

I was just working with another guy on here diagnosing the same thing.

https://forums.yesterdaystractors.com/direct-messages/psb6a-follow-up.5882/#convMessage-19892

It doesn’t show me anything when I click the message.

 

[scootergmc]

He tried linking his private messages... here is the original thread that it probably references. If you search PSB pumps on this site you'll get more responses with similar information.

Thread 'Oliver 88 Injection Pump'

May 18, 2026

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?

• 88dieselboy
• Replies: 16
• Forum: Oliver, Cletrac, Co-op and Cockshutt

• 

 

[Stanley996]

He tried linking his private messages... here is the original thread that it probably references. If you search PSB pumps on this site you'll get more responses with similar information.

Thread 'Oliver 88 Injection Pump'

May 18, 2026

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?

• 88dieselboy
• Replies: 16
• Forum: Oliver, Cletrac, Co-op and Cockshutt

• 

Thank you.

 

[Oliver owner]

Thank you.

Apparently I can’t share PMs. I’ll write an explanation of how to check for a broken plunger tomorrow after work.

 

[Stanley996]

Apparently I can’t share PMs. I’ll write an explanation of how to check for a broken plunger tomorrow after work.

Thanks but I think the plunger is fine. I’m getting fuel now in injector one but not sure how it should spray out. It seems it just flows out of it

 

[Oliver owner]

Thanks but I think the plunger is fine. I’m getting fuel now in injector one but not sure how it should spray out. It seems it just flows out of it

Do you have the injectors out? Or do you have the lines off the hydraulic head on the pump. It should pulse out of each port in the head with a little bit of pressure. Not a constant flow

 

[Stanley996]

Do you have the injectors out? Or do you have the lines off the hydraulic head on the pump. It should pulse out of each port in the head with a little bit of pressure. Not a constant flow

I actually swapped the hydraulic head and I’m getting fuel out of 4 of the ports now. I’m just not getting any out of the bottom one and the one to the right of it.