4500 diesel pump

[berky]

The CAV injector pump on my 3 cylinder (201ci DIESEL)has a slight leak from the throttle shaft on top of the unit. Is there anything that can be done to fix this or does the pump need to come apart?

 

[v240tic]

Had the same problem on my '83 4110. Got this kit from ebay
http://cgi.ebay.com/ebaymotors/CAV-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Now the pump is nice and dry, previously there was a steady dripping of diesel.
Changed the seals without removing the pump from the engine. The top cover has to come of. I cleaned the area, cleaned again, and then another time for good measure, as you don't want any debris falling into the pump ($$$). There are a couple of springs inside, and the linkage for the fuel shutoff, you want to make sure they get reassembled correctly, or you could have a runaway engine on your hands. There are also a couple of parts that could fall into the pump if you drop them when disconnecting the springs.

 

[berky]

thanks, I will get one on order.

 

[Tom-NorthCenTX]

Here is an old copy of my previows post on this topic. Tom

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

 

[berky]

v240tic

Got the kit, installed it and it took care of the issues.
thanks

 

[v240tic]

Nice to hear that it solved your problem. I guess I will have to get around to fitting the kit to my other tractor (a MF 135), as it aslo seems to be suffering from a serious case of incontinence.