Komatsu — 3.6 Inspecting the Fuel Injection Valve Injection Pressure and Spray Pattern

3. Inspection and Adiustement (3) Nozzle valve sliding test Wash the nozzle valve in clean fuel oil. Place the nozzle body vertically and insert the nozzle into the body to about l/3 of its length. The valve is normal if it smoothly falls by its own weight into the body. In peel, and immerse it in clean diesel oil or case of a new nozzle, remove the seal the like to clean the inner and outer sur- faces and to thoroughly remove rust-pre- ventive oil before using the nozzle. Note that a new nozzle is coated with rust-pre- ventive oil and is pasted with the seal peel to shut off outer air.

Nozzle valve sliding check by gravity (4) Nozzle punch mark r Y DLL A - 150 P 244J0 v_- T-T 1 L (Design code Size : size P lnjdon angle : size S L Nozzle insertion angle Code A: angled No code: no angle Type: DLL (semi-long type) YANMAR Punch mark 3-7