NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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0019 00-8 Change 1 Curve. (s) Loosen fasteners and remove cover. Remove two cotter pins, and loosen the two slotted nuts enough to permit adjusting ring rotation (Figure 4). NOTE Do not turn the adjusting ring more than 1/16 in. (1.5240 mm) during any one adjustment. (t) Rotate the adjusting ring (Figure 4) 1/16 in. (1.5240mm) toward the rear of the bench (retard position) if the advance assembly advanced too soon. Move the adjusting ring 1/16 in. (1.5240mm) in the opposite direction (advance position) toward operator, if the advance assembly advanced too late. Tighten the slotted nuts, install cover and repeat (c) through (n), above. When advance readings are within the prescribed limits, the advance assembly may be removed from the bench as outlined in (p) above. Secure the adjusting ring slotted nuts with cotter pins. 220 AUTOMATIC INJECTION ADVANCE ASSEMBLY OVERHAUL—Continued 0019 00 TESTING – Continued NOTE The advance assembly should be retarded slightly if the advance varies more than 2 degrees at 300 rpm when the oil pressure drain button is depressed. This variance indicates the mechanical retard stop is not in phase with the hydraulic valve. (r) Push speed control stop switch to disengage eddy current clutch. Turn counter, motor, and motor starter off. Figure 5. Fuel Injector Advance Unit Performance - 2815 NMWR 9-