Hirth F-23 - Maintenance Schedule and Intervals

27
MAINTENANCE
INTERVALS
(STATED HRS)
5
hr
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
375
hrs
1
replace oil in
gearbox
x
x
x
x
x
2
re-torque
gearbox bolts
x
x
x
x
x
x
x
X
X
3
check oil level in
gearbox
x
x
x
x
x
x
x
x
x
4
check centrifugal
clutch for wear
x
x
x
x
x
x
x
5
check dampner
in gearbox for
wear
x
x
x
x
x
x
x
6
re-torque all
external
fasteners,(nut,bol
t,screw,etc)
x
x
x
x
x
x
x
x
7
remove exhaust
manifold and
check for carbon
build up on
piston rings
x
x
x
8
clean spark plugs
x
9
replace spark
plugs
x
x
x
x
x
x
x
10
check fit and
serviceability of
spark plug caps
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
11
check ignition
timing
x
x
x
12
grease cable of
recoil starter
x
x
x
13
check electrical
connections for
tight connection
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
14
check wires for
abraded spots
and loose wires
at connectors
x
x
x
x
x
x
x
15
tension cooling
fan belt
x
x
x
x
x
x
x
16
check cooling fan
belt
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
17
replace cooling
fan belt
x
x
x
18
check wear & fit
of cooling fan
bearings
x
x
x
19
check air guide
for cracks
x
x
x
x
x
x
x
20
check exhaust
system for cracks
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
21
re-torque
exhaust manifold
bolts
x
x
x
x
x
x
x
x
x
22
check exhaust
gasket
x
x
x
x
x
x
x
23
check & grease
bendix on
electric starter
x