Stihl 140, Руководство по ремонту

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To replace the safety control block
housing:
Remove
- control piston
(see 6.2),
- injector (see 6.4),
- non-return valve (see 6.5) and
- detergent metering valve
(see 6.6).
Reassemble parts in reverse order
and ensure that O-rings are fitted.
•
Carefully insert adjusting
screw (1) into opening (2) in
microswitch.
- Turn in fastening screws and
tighten down crosswise with a
torque of 7 Nm.
- Then set the working and cutout
pressure (see 6.3) and refit the
lead seal on the safety control
block.
- Remove shroud (see 5.1).
•
Carefully prise off U-bar (1) with
a screwdriver if necessary and
pull it out.
•
Draw control piston (2) out of
safety control block housing.
•
O-rings (1, 2) on control piston
must always be replaced.
- Examine control piston for signs
of damage and replace
completely if necessary. Ensure
that correct control piston is fitted
(spare parts list).
•
Draw valve body out of
safety control block with hook
5910 890 2900. Remove ball
and valve-seat insert from safety
control block.
•
Replace O-ring (1) in valve body.
- Examine valve body, ball and
valve-seat insert; replace if ne-
cessary.
- Clean valve seat in safety control
block.
Reassemble parts in reverse order.
Note: Thinly coat valve-seat
insert, valve body and O-ring with
special grease for high-pressure
cleaners 0781 145 3516 before
fitting them.
- Fit control piston and secure with
U-bar.
•
Then set pressure control
system
(see 6.3).
6.2 Removing / installing the
control piston
621RA013 BL
1
2
621RA014 BL
1
2
10 RE 140 K, 160 K