Stihl 140, Руководство по ремонту

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- Unscrew high-pressure hose,
remove shroud if necessary
(see 5.1).
•
Unscrew high-pressure hose
connection with size 30 fork
wrench.
- Replace O-ring in high-pressure
port.
•
Pull injector out of safety
control block housing with hook
5910 890 2900.
Engage hook in two holes in
injector housing.
•
Drive injector nozzle (1) out of
injector housing with a pin
(dia. 2 mm).
•
Replace O-rings in injector.
- Examine injector nozzle and
housing; replace if necessary.
- Clean valve seat in safety control
block housing.
Reassemble parts in reverse order.
- Thoroughly grease injector and
O-rings before refitting them
(special grease 0781 145 3516).
- Screw high-pressure hose
connection in as far as possible
with new sealing ring.
- Remove safety control block
(see 6.1).
- Remove injector (see 6.4).
•
Pull spring (1) and piston (2) out
of safety control block housing
(use pliers if necessary).
•
Replace O-ring (3) on piston.
- Clean valve seat in safety control
block housing.
Reassemble parts in reverse order.
- Insert piston in housing with
O-ring facing inwards.
- Ensure that piston and spring
are seated correctly.
Refit injector and safety control
block.
621RA012 BL
621RA017 BL
1
621RA022 BL
1
2
3
6.4 Injector 6.5 Non-return valve
12 RE 140 K, 160 K