Honeywell HW4000 - Portable Generator NOT, Руководство по обслуживанию

Страница: 31 / 52

Honeywell Portable Generator Service Manual www.honeywellgenerators.com 7-7
VALVE CLEARANCE
6.
Slide off spark arrestor clamp.
7.
Using a screwdriver, loosen and remove retaining
screw on park arrestor screen cap (B); pull off cap.
8.
Pull out spark arrestor screen (C).
9. Inspect spark arrestor screen.
„
If screen is damaged or excessively worn, replace
with new screen.
„
If screen is in good condition, clean using wire
brush and then reinstall.
10. Reinstall remaining spark arrestor components.
„
Spark arrestor cap
„
Retaining screw
„
Clamp and screw
„ Spark arrestor enclosure panel
7.5 VALVE CLEARANCE
1. Remove the cylinder head cover and carefully remove
the gasket for re-use.
2.
Remove the spark plug to reduce engine compres-
sion resistance.
3. Turn the engine crankshaft using the recoil starter,
positioning engine at top, dead center, of the com-
pression stroke. This can be verified by the piston
position in the cylinder.
4. Insert a feeler gauge between the rocker arm and
valve spring to measure valve clearance.
5. Hold the rocker arm pivot and loosen the lock nut (see
B in illustration).
6. Turn the rocker arm pivot (see C in illustration) to
obtain specified clearance.
FIGURE 7-14: Clean Screen
Valve clearance inspection and adjustment must be per-
formed with the engine cold.
FIGURE 7-15: Lock Nut Location
Standard valve clearance
IN.
0.15±0.02 mm
(0.006 ± 0.001 in)
EX.
0.20±0.02 mm
(0.008 ± 0.001 in)
TABLE 7-4.
Standard Valve Clearance
A—ROCKER ARM
B—LOCK NUT
10-14 N•m
•
To increase valve clearance,
screw pivot nut out.
•
To decrease valve clearance,
screw pivot nut in.
C—PIVOT
LOCK NUT
A
B
C
CAUTION