Fuel hose description, 70_a_ installation, 70_c_, 73_c_, 75 length, 9_d_ maintenance, 40_j_, 52, 73_d_ removal, 40_j_, 70_b_, 73_b_, 75 replacement, 5_b_, 48_b_, 58, 70, 73 stiffening of, 21 Fuel oils, 35, 36, 40 Fuel tanks angle when firing, 24_b_ cleaning, 53_a_, 53_b_ description, 5_a_, 68_a_ fuel level, 53_b_, 68_a_ inspection, 53_a_ installation, 68_b_ maintenance, 68_c_ removal, 68_b_ Fuel valve adjustment, 61_a_ cleaning, 56_f_, 61_d_ description, 5_b_, 74_a_, 75_a_ effects of dirt, 42 failure to close, 62 installation, 61_a_, 74_c_, 75_c_ leaks, 56, 58 lubrication, 49 operation, 14_c_, 26_b_, 61_a_, 74_a_, 75_a_ removal, 74_b_, 75_b_ testing, 56_c_ Funnel, 35-37 - G - Gage, fuel-tank testing, 48_b_, 56_b_, 67_d_ Gage, pressure testing, 48_b_, 53_d_, 56_b_, 67_d_ Gasoline, in fuels, 34-40, 43, 44 Gloves, 20_g_ Grease, 49 Grip safety, 14_c_, 49, 56_d_, 62, 74 Grip support, 74