YAMAHA AUTOLUBE PUMP
2-3 Handling the Oil Pump The oil pump is a precision-machined assembly. Make no attempt to disassemble it. When you remove the oil pump from the engine, protect it from dust, dirt, etc., a. after reinstalling it, bleed and adjust the pump correct, keep the pump free from trouble.
The oil pump is similar in both construction and operation to other Autolube systems. The only difference is the employment of a 5.5 diameter plunger because of larger consumption of oil by a 100 —175 c.c. sing. cylinder engine.
2-3-A. Checking Minimum Pump Stroke 11 Checking a. Fully close the accelerator grip. b. Turn the oil pump starter plate in the direction of the arrow marked on the Plate. Then measure the gap between the adjusting Pulley and the adjust-ing Plate. Keep the gap as wide as Possible by observing it with the eye.
c. Insert a feeler gauge (0.15 mm.) into the gap
When the gap allows it to enter Stroke is correct.
When the gal) does not allow . . Stroke is insufficient.
a. Remove the adjusting plate lock nut, and then remove the adjusting plate.
b. Install a 0.1 mrn. adjusting shim where the adjusting plate was.
c. Reinstall the adjusting plate lock nut, and measure minimum stroke. When the gap allows a 0.20 min. feeler gauge to enter but does not allow a 0.25 mm, the stroke is correctly adjust.
Stroke nominal clearance 0.20 to 0.25 mm.