Hirth F-23, Operator'S Manual

Page: 28 / 34

28
Maintenance
Intervals in hrs. 5
h
r
10
hr 12
hr 25
hr 50
hrs 75
hrs 100
hrs 125
hrs 150
hrs 175
hrs 200
hrs 225
hrs 250
hrs 275
hrs
300
hrs 325
hrs 350
hrs
24 replace carbon
brushes of
electric starter x
25 check starter
gear of engine
for wear x
26 check fuel filter x x x x x x x x x x x x
27 replace fuel filter x x x
28 clean air filter(oil
if applicable) x x x x x x x x x x x x x x
29 replace air filter x
30 check
carburetors
&readjust if
necessary x x x x x
31 rebuild carbs x x x
32 clean carbs &
check for leaks x x x x
33 check carb jet
needle for wear,
replace if
necessary x
34 replace needle jet
and jet needle x x x
35 rebuild fuel
pump x x x
36 replace fuel line x x x
37 lubricate control
cables x x x x x x x x x x x x x x x
38 check fuel
hoses/pulse line
for leaks x x x x x x x x x x x x x x x
39 check
engine&accessor
y mounting
supports x x x x x x x x x x x x x x x
40 decarbonize
cylinder head,
piston crown and
exhaust port x x x
41 decarbonize
piston rings &
ring grooves x x x
42 check pistons for
wear x x x
43 check gap of
piston rings x x x
44 check cylinder
for cracks x x x
45 check cylinder
head for cracks x x x
46 check piston pin
& bearing for
pitting x x x
47 check axial
clearance of
connecting rod x x x