Time of discharge, 9_b_ Tool kit, 10_a_, 77_a_ Training, 15, 30_a_ Trigger, 14_b_, 26_a_, 49, 52, 63, 76 Trigger rod description, 76_a_ lubrication, 49 maintenance, 52_l_, 76_d_ Trigger screw, 76 Trigger spring, 52_k_, 63_d_, 76 - U - Underbrush, 22_b_ Uses of flame throwers, 3 - V - Valve-adjusting wrench source, 48_a_ use, 75_d_ Valve, pressure-tank, 75 Valve-diaphragm assembly, 10, 48_b_, 56_c_, 58_a_, 74, 75 Valve flexible shaft adjustment, 66_d_ description, 66_a_ installation, 66_c_ lubrication, 49 removal, 66_b_ Valve grip action, 14_c_, 74_a_ description, 74_a_ effects of dirt, 42 installation, 74_c_ leaks, 58_a_ lubrication, 49, 56_d_, 74_d_ maintenance, 74_d_ removal, 74_b_ Valve-grip spring, 74 Valve lever description, 74_a_ installation, 74_c_ lubrication, 49 operation, 14_c_, 62, 74_a_ play, 52_e_ removal, 74_b_ Valve needle adjustment, 52_e_, 75_d_ cleaning, 52, 55_d_ description, 75_a_ installation, 75_c_ leaks, 58 removal, 75_b_, 75_e_