Make sure that a 1.1 mm (0.04 in.) diameter drill will go through the nozzle hole (A) (1.2 mm (0.05 in.) diameter).
Insert the other end of a 0.9 mm (0.04 in.) drill into the oil intake (1.0 mm (0.04 in.) diameter). Make sure the check ball (B) moves smoothly and has a stroke of approximately 4.0 mm (0.16 in.).
Check the oil jet operation with an air nozzle. It should take at least 310 kPa (3.2 kgf/cm
2
, 46 psi) to unseat the check ball.
NOTE: Replace the oil jet assembly if the nozzle is damaged or bent.
Carefully install the oil jet. The mounting torque is critical.