MOTOR GP-GEAR 1756633 - Caterpillar

(3) Rack setting (setting for limiting the maximum engine output) (a) Hold the speed control lever at the position for the indicated output and speed (specified for purpose of governor adjustment). (b) Under this condition, check to be sure that the engine is running in a steady state.(c) With the engine running in a steady condition, adjust the full-load stopper bolt, as follows: (d) Reposition the full-load stopper bolt by tightening or loosening (to push or pull out the fuel control rack through the levers) in order to find out just where the engine produces the rated output.(e) Having positioned the stopper bolt properly (for the rated output), back it off slowly while observing the speed (which will be above the rated speed). Stop backing it off just when the speed begins to fall from the rated level. Secure the stopper bolt (rack set bolt) in that position with its lock nut.(f) At that time, the speed control lever should be at the maximum speed side.(g) Turning the full-load stopper bolt clockwise will increase the injection quantity (engine output), and vice verse.(4) Governor setting (setting for limiting the maximum engine speed) (a) Hold the speed control lever at the indicated maximum speed position while applying full load to the engine.(b) Set the governor set bolt (maximum speed set bolt) at the indicated speed position.(5) Determining the speed regulation (speed droop) [1] Speed regulation upon removing load (a) Run the engine with the speed control lever set for the rated condition of load and speed.(b) With the control lever held there, remove the load to bring the engine into no-load condition. Do not move the speed control lever.(c) The speed will increase once and decrease, as shown and settle at a new steady state level. Read the highest speed (N2) occurring in this transition and the speed (N3) after settling, and the time (t1) from the moment of removing the load at initial speed (N1) to the speed settling at the new level (N3).[2] Speed regulation upon applying load With the engine running in no-load condition subsequent to the condition mentioned in (b), [1], 5 above, and with the speed control lever left in the same position as above, put the prescribed load instantaneously on the engine: the speed will decrease once and increase, as shown, and settle at a new steady state level. Read the lowest speed (N5) occurring in this transition and the speed (N6) after settling, and the time (t2) from N4 to N6.[3] Computing the speed regulation From the values obtained in [1] and [2], above, compute the speed regulation for each load change. A total of four percent values of speed regulation are to be determined by using the indicated formulas.If the computed values are at variance with the prescribed values, "governor notch adjustment" must be made to eliminate the variance.(6) Speed regulation adjustment (governor notch adjustment) (a) This adjustment is to be made by turning the adjusting screw for swivel lever to increase