Yanmar 3YM30 Sevice Manual page 39

b) Measure valve clearance
Insert a 0.2 mm thickness gage between the
rocker arm and valve cap, and adjust the valve
clearance. Tighten the adjusting bolt.
Standard valve clearance (mm)
0.15-0.25
c) Apply oil to the contact surface between
adjusting screw and push rod.
d) Adjusting other cylinders
Turn the crankshaft 240
adjustment for the No.3 cylinder. Then adjust
the No.2 cylinder in this order.
The cylinder to be adjusted first does not have to
be the No.1 cylinder.
cylinder where the piston is the nearest to the top dead center after turning, and make adjustment
for other cylinders in the order of ignition by turning the crankshaft 240
(6) Check and adjust the remote control operation
The various control levers on the engine side are connected to the remote control lever by the remote
control cable. The cable will become stretched and the attachments loose after long hours of use
causing deviation. It is dangerous to control operation under these conditions, and the remote control
cable must be checked and adjusted periodically.
1) Adjusting the throttle remote control cable
Check to see that the control lever on the engine
side moves to the high speed stop position and low
speed stop position when the remote control lever
is moved to H (high speed) and L (low speed)
respectively.
When there is deviation, loosen the clamp for the
remote control cable on the engine side and
adjust.
Adjust the high speed stop position first and then
adjust the low speed idling by the adjustment bolt
on the remote control lever.
2) Adjusting the clutch remote control cable
Check that the shift lever moves to the correct
position, when the remote control handle is put in
NEUTRAL, FORWARD and REVERSE position.
Use the NEUTRAL position as the standard for
adjustment. When there is deviation, loosen the
clamp for the remote control cable and adjust the
shift lever position
then and make
°
Select and adjust the
Never adjust the high speed limiting bolt. This will void warranty.
24
2. Inspection and adjustment
(Valve clearance adjustment)
each time.
°
High speed
Remote
limiting bolt
control
cable
Clamp
Control
lever
Cable
joint
REVERSE
Shift lever
Fuel
injection
pump
Low speed
limiting bolt
Clamp
Clutch remote
control cable
NEUTRAL
FORWARD