OPERATIONAL PERFORMANCE TEST / Component Test T4-5-25 Adjustment Item Adjustment Procedure Remarks 3. Pilot Pressure Characteristics Q Pi Loosen lock nut (5) and turn ad- justing screw (6). Rotating adjusting screw (6) 1/4 a turn clockwise decreases the flow rate by 13.2 cm3/rev. (0.71 in3/rev). : 30 mm : 29.4 N⋅m (3 kgf⋅m, 21.7 lbf⋅ft) 1) Do not turn adjusting screw (6) more than one turn. 2) When adjusting screw (6) is turned clockwise, the maximum flow rate will also be decreased. In order to maintain the maximum flow rate unchanged, turn adjusting screw (4) counterclockwise twice as much as adjusting screw (6) is turned.
This ratio of 2 (adjusting screw (4) counterclockwise turn) to 1 (adjust- ing screw (6) clockwise turn) is to counterbalance. 3) Securely tighten lock nut (5) after adjustment. 4. P-Q Control (Torque Adjustment) Q A Pd Q B Pd A: Loosen lock nut (7) and turn adjusting screw (8). Rotating adjusting screw (8) 1/4 a turn clockwise increases the flow rate by 15.3 cm3/rev. (0.93 in3/rev.). B: Loosen lock nut (9) and turn adjusting screw (10). Rotating adjusting screw (10) 1/4 a turn clockwise increases the flow rate by 3.60 cm3/rev. (0.22 in3/rev). 1) Do not turn the adjusting screws more than one turn. 2) Rotate the adjusting screws watch- ing the engine performance.
3) Securely tighten lock nut (7) or (9) after adjustment.