Yanmar 4LHA-HTP Operation Manual page 402

Chapter 3 Fuel Injection Equipment
9. Pump Reassembly, Adjustment and Inspection
Fig. 4
(
V
Fig. 6
(J
b) Plunger control sleeve movement
Move the control sleeve 4 mm in an axial
direction either side of the cut-off port. Ro-
tate control sleeve and repeat. The control
sleeve must slide smoothly in any position.
4. Timer Movement Inspection
Position the plunger in the bottom dead center
position. Push the timer piston from the retard
side and observe timer movement. The timer
must move smoothly. The force required for
this movement should not exceed the speci-
fied value (Max1N(0.1 kgf))
5. Visual Inspection of Timer Lock
Pin
Visually check that the timer connection lock
pin [(25) in Fig. 25] is set correctly. Ensure a
new clip (26) is installed at every service.
3-1-45
4LHA Series