Table   1-1.   Time   Standards   (Cont) MAC  chart Removal   and   replacement group  no. Timing  gear  and  cover Cylinder   head   and   valve   operating   mechanism Rocker   arm   shaft   assembly Rocker  arm  assembly Pushrod Cylinder   head   assembly Valves  intake  and  exhaust Springs   valve Seats  intake  and  exhaust  valves Guides,  valve Head   cylinder Lifters,  valve 21 25 26 27 28 Camshaft Piston   and   rings Piston   pin Connecting   rod Rod   bearings Piston   rings Piston Crankshaft Base   group Skid  base Winterization   kit   (fuel   burning) Control   box   assembly Light    assembly Circuit    breaker Power   switch Heater   assembly Valve   assembly,   regulator Terminal   board Switch,   limit Switch,   flame coolant   pump   and   motor   assembly Relief   valve Motor   assembly Motor Burner   chamber Heat   exchanger Heater   kit,   winterization   (electric) Coolant  pump  and  motor  assembly Pump Relief   valve Mot or Control  box Wiring  harness Transformers Relay Semi   conductors Circuit    breaker Power   switch Fuse   holder Light  assembly Wheel  mounting  kit Load  bank Load   reject   relay Terminal   board Diodes Man  hours 5.9 - -- - - - 0.9 0.6 - - - 5.9 5.4 6.1 6.1 4.0 14.8 14.6 - -- 11.8 11.8 11.8 11.9 11.2 16.5 40.0 - -- - -- 0.5 0.5 0.5 0.7 0.6 0.3 0.4 0.4 0.9 0.5 0:2 1.4 1.6 1:6 2.0 1.6 - -- 0.5 0.2 0.5 - -- 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5 8.0 1.0 - -- 0.5 1-7