TM 10-4610-215-24TM 08580A–24/2(19) Remove crankshaft (18) from pump block (22).(20) Remove worm wheel (19) from crankshaft (18).(21) Remove Woodruff key (20) from crankshaft (18).(22) Remove bearing (21) from crankshaft (18).c. DisassemblyofDriveGearCasing. (Figure 3-28) (USMC)CAUTIONThe chemical feed block/head assembly is a delicate piece ofequipment. It can be damaged if dirt or grease gets into themechanism. Make sure work area is clean.(1) Remove pump motor from pump assembly in accordance with paragraph 2-48.(2) Remove pump block head assembly in accordance with paragraph 3-30.(3) Remove pump head assembly in accordance with paragraph 3-32.NOTEWrap pump head assembly in a clean lint free cloth.(4) Remove feed pump stroke control in accordance with paragraph 3-33.(5) Turn worm gear (4) counterclockwise and remove from pump block (3).(6) Remove C-clips (5) and (6) from worm gear (4).(7) Remove ball bearing (7) from worm gear (4).(8) Remove diaphragm (8), push plate (9), and splash protection plate (10).(9) Remove diaphragm drive (11) and gasket (12).(10) Remove spring (13), C-clip (14), grooved ring (15), and Woodruff key (16) from thrust rod (17).(11) Remove eccentric shaft (18) from pump block (3).(12) Remove worm wheel (19) and Woodruff key (20) from shaft (18).(13) Remove ball bearing (21) from shaft (18).3-122
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