New here. Need help with jd 755 (engine and injection pump) pics

[thepumpguysc]

I think your WAY OFF on the rebuild estimate.. {to hi}
Why not throw it in a box & send it to SC.??
U got nothing to lose but 14.00. {shipping}

 

[Cw021382]

Strange thing, that middle tappet was up. When I removed the middle dv retainer it popped back out. The rack is stuck. Im either going to have the pump rebuilt or buy the donor engine. I’m not going to mess with this one myself. I was just researching options.

I may just ship it to you. What’s your address? I’ll be busy wiring the new barn today and I’ll think it over. Thanks.

 

[thepumpguysc]

I'll send it to u in an email..

sent..

 

[toyotractor]

Greetings All:

I came across this dated post which has provided some great in-depth information via photos of the insides of a 755-injector pump.

My 755 injector pump has VERY!! slight fuel seepage out of one of the pumps fittings. This fitting is 1 of 3 (a 3-cylinder pump) where one end of it screws into the pump housing the other end attaches to the high-pressure fuel line going to the injector.

The fuel is seeping out where the fitting screws into the pump housing.

Getting any specific information on this pump is most challenging.

I see in the photos listed by Cw021382 posted here there is what looks like a simple O-ring on the threaded portion body that screws into the pump housing. I assume this O-ring needs replacing.

Before I take the fitting out, I am wondering if this is simple job to replace the O-ring. As in remove the fitting, replace the O-ring and reinstall.

This post writes about removing the plungers from the seals and causing damage. I assume if careful one will not disturb the plunger/seal.

The tractor runs fine now and has been for a long time even with this seeping issue. I don't want issues by trying to fix it and causing damage by turning a minor issue into something larger.

Thanks.

 

[thepumpguysc]

There’s a thin copper gskt called the delivery valve gasket AND an oring called the holder oring..
U might get away with just TORQUING THE HOLDER TO 35 ftlbs.. good luck