TM  10-3930-638-24&P 4-3.   FUEL   SYSTEM   MAINTENANCE   (cont) b. Fuel Injection Pump (cont). STEP LOCATION ITEM ACTION REMARKS REASSEMBLY  (cont) 31 Metering a. Shim (61) Position On  metering  valve  (53) valve (53) NOTE Metering valve is furnished in two sizes: A and B. If original valve has a ring groove cut just below shouldered top crown, order size B for replacement; otherwise order size A. b.  Metering  valve Install On metering valve (53) as shown; use soft arm (55) hammer 32 Housing,  top a. Spring (62) Install On  metering  valve  (53) b.  Metering  valve Install  in  its Depress and rotate several times to ensure (53), shim (61), bore freedom of movement. If valve sticks, lap metering valve it with clean diesel fuel arm  (55)  and spring (62) 4-121