Yanmar 3TNV82A-B Service Manual page 202

ENGINE
(1) (2)
Figure 6-86
12. Hold the adjusting screw (Figure 6-86, (4))
while tightening the valve adjusting screw lock
nut (Figure 6-86, (5)). Recheck the clearance.
13. Apply oil to the contact surface between the
adjusting screw and push rod.
14. Rotate the crankshaft to measure and adjust
the set of valves. Continue until all valves are
measured and adjusted.
6-70
(3)
(4)
(5)
0001918
Measuring and Adjusting Valve Clearance
TNV DI Service Manual