71 D6C 10K 5884 serial. D333C. Injector help

The capsule type injectors really can't be fixed, just replace with a new one. If you want to diagnose it down to a gnat's a$$, you can swap the " bad" injector with a "good"one and see if the knock follows the bad one or stays with the cylinder and injection pump.

Safest place would be the nearest Caterpillar dealer. If you have a parts book or the part number for the injector "valve" as CAT calls them, you can do an online search and get lots of hits with cross over numbers if any exist and places offering that part for sale. You will find the part number for a service group that includes the nozzle and two seals that fit around the hold down nut and under the fuel line nut to keep out dust and water etc. Or you can get the actual part numbers for the nozzle and seals separately.

I have been using global parts zone I think it's called for a couple years now. Sorry I don't have a parts book to look yours up for you.

You generally need a 1" socket and a breaker bar or torque wrench is good to remove the hold down nut........(torque to 125 #ft when replacing ......no more ....or you may damage the new nozzle)

A 3/4" open end wrench is required to remove the line, bleed the air out etc.

[quote="ccjersey"]Safest place would be the nearest Caterpillar dealer. If you have a parts book or the part number for the injector "valve" as CAT calls them, you can do an online search and get lots of hits with cross over numbers if any exist and places offering that part for sale. You will find the part number for a service group that includes the nozzle and two seals that fit around the hold down nut and under the fuel line nut to keep out dust and water etc. Or you can get the actual part numbers for the nozzle and seals separately.

I have been using global parts zone I think it's called for a couple years now. Sorry I don't have a parts book to look yours up for you.

You generally need a 1" socket and a breaker bar or torque wrench is good to remove the hold down nut........(torque to 125 #ft when replacing ......no more ....or you may damage the new nozzle)

A 3/4" open end wrench is required to remove the line, bleed the air out etc.[/quote]

I have the correct parts book just not the correct service manual. I appreciate the help. Ill go down monday and give it a go.
It would be awesome if there was a mechanic that knew these machines in East Texas around the Tyler area.

Valve service group is a 7S9891 or 8N8796
Nozzle only is a 7S8722 or 8N4694