4.2. Bottom clearance adjustment(Fuel Injection Timing) 1. The Fuel Injection Timing of MP-pump is made by means of adjusting the bottom clearance of the Cam ie. adjustment of the Bottom clearance gauge Pre-stroke of the plunger , as follows. 2. The adjustment of the clearance shall be made at cam-top position in order to get the reliable and easier method. Therefore herein after we will mention that “The adjustment of the bottoms clearance (of the Cam)”. 3. First of all , put the JIG of the bottom clearance measurement on the standard gauge(W/”A”- measurement). Then set the O-point of the dial gauge. 4.
Next adjust the clearance by shims into the standard after measuring the bottom clearance A* with JIG (Dial gauge)(Refer Dial gauge to the attached sheet)*Measurement between upper surface of A the Barrel and upper surface of the plunger at Cam bottom position Bottom clearance gaug Barrel A Plunger Shim 44