TESTING AND ADJUSTING TESTING AND ADJUSTING FOR FUEL INJECTION TIMING 4. Remove snap ring (6) of the rocker arm shaft on the No. 1 cylinder side, and then remove rocker arm (7) of the No. 1 air intake valve. a Remove the valve stem cap, too. 8. Install dial gauge F2 on the valve stem of No. 1 air intake valve (11) and set it to the 0 point. a Since the No. 1 cylinder is at the compres- sion top dead center, set this point as the 0 point. 9. Rotate the crankshaft about 45° in reverse. 10. Rotate the crankshaft forward slowly so that dial gauge F2 will indicate fuel injection timing dimen- sion (a).
a When adjusting the crankshaft to fuel injec- tion timing dimension (a), be sure to rotate it forward so that the adjustment will not be affected by the backlash of the drive gear. (If the crankshaft passes the adjustment dimen- sion, return it sufficiently, and then adjust it again forward.) a Fuel injection timing dimension (a) and fuel injection timing 5. Using spring pusher F1 , remove valve cotter (8) of the No. 1 air intake valve. 6. Loosen spring pusher F1 and remove seat (9) and spring (10). 7. While No. 1 air intake valve (11) is in contact with the top of piston (12), turn the valve stem with the hand to press No. 1 air intake valve (11) against the piston.
a Since the piston stroke will be measured at the valve stem top, check that the valve bot- tom is in contact with the piston top securely. 11. Disconnect all of connected fuel injection tubes (12), if there are any. 20-114 PC130-7 (1) Fuel injection timin dimension (a) g mm 0.42 ± 0.08 Fuel injection timin (Reference) g ° 6 ± 0.75