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The injection pump timing gear must be fitted correctly in order that the injection pump timing is correct for the Standard 23C engine.
The process of how to do this is shown in our MF35 (23C) Engine Rebuild DVD.
One thing to be aware of is that the measurement (45 degrees anti-clockwise from the master spline) is not definitive, but approximate. Another difficulty here is that the gear rotates as it slides in and meshes with the intermediate gear. It is the fully meshed poistion of the gear when the 45 degree line should be close to vertical.
After fitting the injection pump it may be found that the ‘G’ mark will not line up with the circlip as it should. If this is the case it would then be necessary to rotate the injection pump timing gear by one tooth (in either direction) and refit.