EFA EFA Z27, Operating Instructions, Maintenance Instructions, Spare Part List

Page: 6 / 14

Schmid & Wezel
D-75433 Maulbronn Seite / Page
4/ 12
Ausführung / Execution
05.2004
in Annex A.4 "Exploded diagram, Z27/ Z27S" (pg.
11)
4.1 Changing Blades
4.1.1 Changing the blades
„
Close the blades (36)
„
Switch off the hydraulic power pack and depres-
surise the system by actuating the two-hand
safety circuit once (see Annex 3.2.1 "Switching
on" (pg. 3))
„
Disconnect the cutter (see Chapter 3.1.3 "Con-
necting and disconnecting the cutter" (pg. 3))
„
Disassemble the taper sleeve (47) and force out
both bolts (44, 46) paying attention to a clean
contact of the fork (45).
„
Remove the hex. nut (42) with locking washer
(41) and threaded bolt (38).
Before assembling the cutter, clean the removed
parts, inspect them for wear and replace, if neces-
sary.
Grease all sliding points with EFA special grease.
4.1.2 Checking the blade clearance
In order to avoid breakage, the blades must always
be adjusted without clearance but with free move-
ment. The adjustment is made using the locking
washer (41) and hex. nut (42).
4.1.3 Blade installation
Before reassembling the cutter, clean the removed
parts, inspect them for wear and replace, if neces-
sary. Grease all sliding points with EFA special
grease.
Before securing in the forks (45), adjust the blades
(36) via the locking washer (41) and the self-locking
hex. nuts (42) so that they are clearance-free but
can move freely.
4.2 Valve Replacement
Replacing the valve parts
„
Remove screw (26) to release the handle (23).
„
Remove the snap ring (22) and pull out the
valve (17 - 21), clean the removed parts,
inspect them for wear and install again in the
reverse order.
Always replace the valve (17 - 21) together with the
snap ring (22).
4.3 Changing Pistons
Replacing the piston parts
The assembly kit must be available for this repair.
See also Annex A.2 "List of spare and wear parts"
(pg. 8).
„
Remove the blades (36) (see Chapter 4.1.1
"Changing the blades" (pg. 4)).
„
Disassemble the cutter body (27).
„
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 the parts, check Pos. 2, 3, 10 and 11
for signs of wear and reassemble in reverse
order.
Grease all sliding points and blades (36) with EFA
special grease .
4.4 Hydraulic Power Unit
At least once a year, drain the oil filling, inspect for
soiling and replace if necessary. (See also Annex
3.1.2 "Hydraulic power unit" (pg. 3) and separate
operating manual for the hydraulic power unit).
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. 1).
Figure 1:Spring balancer
„
Turn the screw in MINUS direction until the cut-
ter is hanging freely in equilibrium (with the
spring balancer) at working height.