SIMMS/MINIMEC/CAV PUMP Removal for Case David Brown Tractors.
Certain models of Case David Brown Tractors can have a Simms/Minimec or CAV pump. We have seen some of these with the Bosch PES*A Style pump on them also. The model 1210 is one of these, the aftermarket service manuals we have found will not even acknowledge that this model has a Bosch pump there is no after market service manual that I have found that will give you any detailed instructions on how to remove these.
If the tractor has one of the above pumps there should be a small removable plate behind the radiator on the front of the timing gear cover opposite of the injector pump. For units without a removable plate follow the instructions on the *70 Series Tractors.
Remove this cover, if it has a Simms or Bosch there will be one nut. It will take a 11/16 or a ¾ inch socket to remove this. If it has a CAV rotary pump there will be 3 small bolts that will take a ½ inch socket to remove.
ON THESE STYLE PUMPS THERE IS NO INTERNAL TIMING OF THE INJECTION PUMP. The gear can not be moved with out first removing the whole timing gear cover, therefore it should not get out of time. The pump will only fit to the gear one way, and is aligned by a key way in the Bosch and Simms, and a dowel pin in the rotary CAV.
On the Simms and Bosch pumps the drive shaft is tapered and the gear will not just fall off when the nut is removed, you will need a small puller to thread into the gear. If the gear is not equipped with holes for a puller first remove the lock washer and then thread the nut back onto the pump drive shaft leaving it flush with the end of the threads, then take a aluminum punch or something of soft material and strike the nut. One quick jar should release the gear from the shaft.