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4.2 Valve replacement
Replacing the valve parts
Remove screws (26, 56) to release the handle
(23).
Loosen snap rings (22, 25) and remove the
valve (16 - 21, 49 - 55), clean the parts, inspect
for wear and install again in the reverse order.
Always replace the valve (16 - 21, 49 - 55) complete
together with snap rings (22, 25).
4.3 Piston changing
Replacing the piston parts
The assembly kit must be available for this repair.
See also Annex A "Annex" (p. 32).
Remove the blades (36) (see Chapter 4.1.1
"Changing the blades" (p. 26))
Remove the bracket (27-35).
Loosen the cylinder barrel (13) from the guide
(1) using the hook wrench (right-hand thread).
Unbolt the housing (1) and push piston rod (7)
with piston (10) in the direction of the guide (1).
Caution:
The cylinders (1, 13) must be secured with Loctite
542!
Install piston (10) only with mounting cone and
expander sleeve - removal is possible only after
heating to 150° C.
Screw the cylinder barrel into guide (1) and
secure with Loctite 542.
Clean all parts, inspect parts 2, 3, 8, 10 and 12
for wear and assemble in the reverse order.
Inspect part 4 from time to time (it is subject to
very little wear).
Grease all sliding points and blades (36) with EFA
Special Grease (see Chapter 6.1.3 "Lubricants and
hydraulic oil" (p. 29).
4.4 Hydraulic power pack
At least once a year, drain the oil filling, inspect for
soiling and replace if necessary. (See also Annex
3.1.3 "Hydraulic power pack" (p. 24) and separate
operating manual for the hydraulic power pack).
Schmid & Wezel
D 75433 Maulbronn
4.5 Adjustment of the spring bal-
ancer
The fine adjustment of the spring balancer is effect-
ed via the PLUS/MINUS screw on its housing (see
Fig. 4).
Figure 4: Spring balancer
Turn the screw in MINUS direction until the saw
is hanging freely in equilibrium (with the spring
balancer) at working height.
If the saw cannot be pulled out, the spring balancer
is jammed and a readjustment is necessary:
Turn the screw in PLUS direction until the saw
can be pulled out and start the fine adjustment
again (see above).
5. Maintenance
Malfunctions may occur during operation, but these
are generally relatively simple to remedy. Table 1:
"Troubleshooting" lists these malfunctions with pos-
sible causes and resulting potential remedies.
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