injector pump leak

[Jim Nye]

My MF 180 started to leak fuel from the throttle shaft on top of the injector pump. How difficult of a job is it to remove the governor cover? I need to replace the o-rings on the shaft. I read somewhere about a spring and its orientation, Is there anything I need to be aware of before I remove the cover? All I have is a exploded picture of the pump. Anyone have instructions for the repair? Big Dean did on his aol hometown site but it is gone...Need some help here. Thanks,Jim

 

[peltsi]

(quoted from post at 19:47:39 03/06/09) My MF 180 started to leak fuel from the throttle shaft on top of the injector pump. How difficult of a job is it to remove the governor cover? I need to replace the o-rings on the shaft. I read somewhere about a spring and its orientation, Is there anything I need to be aware of before I remove the cover? All I have is a exploded picture of the pump. Anyone have instructions for the repair? Big Dean did on his aol hometown site but it is gone...Need some help here. Thanks,Jim

Hi, the first thing is to clean the area around the cover throughly. Then, undo the 2 nuts on the top, and carefully lift the cover just enough too see what's underneath. Make notes, on which holes the spring is mounted, there are 3 on either end and it needs to be mounted back on the same holes. After you get the cover off, it's a simple matter of pushing the shafts out.

I'd also replace the top cover gasket while doing the o-rings.

Good luck with it.

 

[DH in Carolina]

The main thing to do is to clean and clean again as you do not wand any dirt to fall into the injector pump. Also don't let the idle spring fall into the pump while unhooking the bigger spring from rhe lower tombstone. Not a bad job but you will need a pair of needle nose pliers. There are two o-rings on each shaft. There was a guy on Ebay selling the o-rings and gasket for around $9.00. DH

 

[DH in Carolina]

Do a Ebay search for item # 220364365147. Instructions come with kit.

 

[TomTex]

Is your pump a CAV? If it is a CAV, I have been there done that. The CAV is prone to leaking around the throttle shaft and the cut-off shaft. First you will need to get 2 or 3 cans of engine cleaner. Clean, clean, and clean again the whole area. After each spraying, hose off, let dry and do it again. Cleaner the better, if you drop a ball of grease/dirt into the top while the cover is off - big trouble, one piece of crud dropped into the bottom of the pump will cost you about $600-700. Now using a paper towel, start looking for your leak; it will show up real easy on the dry, clean paper towel.
1. MOST important thing is to have some paper and pencil BEFORE you take off the cover.
2. Remove shut-off linkage and throttle linkage.
3. Remove screws or nuts holding lid on.
4. DO NOT just lift up the top. Lift it just a little, very carefully so you can peek under it. A spring is attached from the lid to the bottom part of the pump. One end of spring is hooked on a wide post looking like a tombstone. The tombstone has several holes in it. Write down which hole the spring is hooked in before you remove it. The other end is through one of the holes in the flattened end of the control rod. Again write down the hole it is in before you remove it. This step is VERY IMPORTANT. If the spring is not reassembled to EXACTLY the same holes on both ends, the tractor will never run right again. The same pump can be used on different model tractors with the only difference being how the spring is hooked. My MF dealer mechanic can tell the proper holes by using the 3 numbers on the CAV. Now remove the spring, and lift off the lid.
5. Write down the model/year of tractor, and the model of the CAV pump and serial number. There are 3 different numbers on my CAV pump.
6. Take the cover with you and head to MF dealer and purchase a new gasket and four (4) tiny o-rings that fit around the throttle shaft and the shut-off shaft. Each shaft has 2 o-rings. If the o-rings are not leaking now, they soon will so replace all of them. Total cost of gasket and 4 o-rings is about $5 or $6.
7. You will need a little patience and two extra hands to get the spring attached on both ends and the new gasket fitted. I did this complete procedure on my MF 690 and now it has NO LEAKS.
Tom

 

[peltsi]

Coming back to this thread made me thinking... this forum could really use a FAQ section, as there are a few subjects that constantly seem to pop up, including this injector pump leak, 2 stage clutch adjustment etc... any thoughts?