Oliver 88 diesel

[A . M. Aitkins]

Hello all, I have an Oliver 88 with a 770 diesel engine in it and I'm having a hard time starting it. When I try to start it the starter turns the motor fast enough that it should start. It seems like it's not getting fuel. could it be low pressure on the injector pump? The only way to start it is to pull start it. once it's running everything works great except I can't lower the throttle below 1/4 throttle. Is there anything I can do to get the pressure up on the injector pump. it's a roosa master. Thanks for any help

 

[Dieseltech]

Hello all, I have an Oliver 88 with a 770 diesel engine in it and I'm having a hard time starting it. When I try to start it the starter turns the motor fast enough that it should start. It seems like it's not getting fuel. could it be low pressure on the injector pump? The only way to start it is to pull start it. once it's running everything works great except I can't lower the throttle below 1/4 throttle. Is there anything I can do to get the pressure up on the injector pump. it's a roosa master. Thanks for any help

Sounds like the injection pump hydraulic head is worn badly, hard starting when hot is the first sign.

 

[A . M. Aitkins]

Sounds like the injection pump hydraulic head is worn badly, hard starting when hot is the first sign.

It won't start on it's own wether it's hot or cold. When I pull it through it starts almost imidetly.

 

[Dieseltech]

It won't start on it's own wether it's hot or cold. When I pull it through it starts almost imidetly.

Cranking speed needs to be at least 200 RPM by the starter. What you describe is a SEVERELY worn head/rotor assembly when you can't get engine to recover below 1/4 throttle. Pull starting spins engine faster than the starter can.

 

[A . M. Aitkins]

Can I still run the tractor in the current condition of the injector pump? Or would it be best to let it sit. Thanks

 

[Dieseltech]

Can I still run the tractor in the current condition of the injector pump? Or would it be best to let it sit. Thanks

If it will start, run it. Won't hurt it anymore than it is now. Might get where it won't start at all though as head/rotor wear gets worse.

 

[A . M. Aitkins]

If it will start, run it. Won't hurt it anymore than it is now. Might get where it won't start at all though as head/rotor wear gets worse.

Ok thanks for all the help. I really appreciate it.
thanks

 

[Olliejunkie]

Hello all, I have an Oliver 88 with a 770 diesel engine in it and I'm having a hard time starting it. When I try to start it the starter turns the motor fast enough that it should start. It seems like it's not getting fuel. could it be low pressure on the injector pump? The only way to start it is to pull start it. once it's running everything works great except I can't lower the throttle below 1/4 throttle. Is there anything I can do to get the pressure up on the injector pump. it's a roosa master. Thanks for any help

Diesel tech is most likely right about worn head. Some people have had luck putting a high torque starter on.