Diesel leak on injection pump

Hello.
I have a Toyota Hiace pop-up camper 1992 that I imported from Japan. It is automatic and has a 3L engine (2.8 liters) diesel.

I have a leak of diese of l fuel that seems to come from the injection pump.
Is there anyone who has ever had or experienced this problem!
What is the solution to fix it?

tabernac.... I have the same problem and have researched. There are a few good links here if you search it.

http://www.toyotasurf.asn.au/techsite/fuelpump.htm

If it's just the governor seal which is likely (can be taken off with an allan wrench, 4 bolts in total). The seal is about 12 dollars with post from BC to Quebec. Call Rocky Mountain Imports at 1-800-921-4JDM

There is also an o-ring kit best got from the UK if its more than just the one seal. The o-rings are quite generic and could be found from napa or lordco or a plumbing store?...but the gov seal is unique!

I just ordered both, but won't get to fixing it for a month. Here are the links for the o-ring kit from UK.... if need i may have extra o-ring kit early FEB.

http://www.ebay.co.uk/itm/TOYOTA-HI-ACE-2-4TD-ALTERNATOR-A2710-/190614434715?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c6181739b

Apparently using bio fuel can also cause leaks there....returning to normal fuel sometimes stops the problem without seal renewal

arrg...I have not been using biodiesel. There are a lot of problems with fuel injection pumps on townaces and Hiaces here right now. Is this the norm for a 20 year old engine? I did not start my van for a month. Had to charge the battery and prime the fuel filter. it started and then the next day did not and I heard a sucking of air sound I assume was coming from the breached seal. It's going to take me a while to work all this out...\ and get to fixing it.