Makita EM4251 Service Manual Page 31

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P28 / 45
(3) Install rocker arm assembly. When doing
so, align push rod point with the ball groove
of rocker arm assembly. When installing
rocker shaft, be sure of applying a sufficient
amount of oil in rocker shaft.
5 - 3 - 10 Cam gear cover
5 - 3 - 11 Valve clearance adjustment
Installing cam gear cover
Before installing cam gear cover, be sure
of applying oil on cam lifter-sliding surface.
Fasten cam gear cover with screw M5 x 14
(3 pcs.)
Loosen nut and adjust valve clearance with
adjusting screw with an Allen key.
The valve clearance has to be adjusted at the
compression upper dead center.
After the adjustment, tighten the nut firmly.
The tightening torque for
screw M5 x 14 : 4 - 5.5 N.m
(40 - 55 Kg.cm)
(2.9 - 4.0 ft.lb.)
The tightening torque for
adjusting screw : 5 -6.5 N.m
(50 - 65 Kg.cm)
(3.6 - 4.7 ft.lb.)
Adjusting screw
Ball groove
Push rod
Cam lifter
Fig. 5 - 37
Cam gear cover
Fig. 5 - 38
Thickness gauge
Fig. 5 - 39
Adjusting screw
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