Asco joucomatic 448 Serie Puesta En Marcha Y Consejos De Utilización página 11

GB OPERATING INSTRUCTIONS FOR STBB CYLINDER WITH
For fitting and removal of the guide system the complete cylinder unit
should be removed from the machine or plant.
Dismantling of the Guide Carriage
1. Depressurize the cylinder lines and switch off all electrical power
supply.
2. Remove all parts mounted externally on the guide carriage (16).
3. Unscrew drive block (20) from piston of cylinder so that the guide
carriage can be moved.
4. Loosen screws (10) in wiper cover (11).
5. For diameters 40 and 50 only: remove one end cap of the cylinder.
6. Slide the complete guide carriage off the double rail (1).
7. Remove the wiper covers (11) with felts (12) and wipers (13) from
both ends of the guide carriage (16).
8. Loosen and remove the screws (14) and separate the pair of roller
shoes (15) from the guide carriage (16).
Dismantling of the Brake
1. Remove the screws (6) and remove the plates (7) and springs (8)
from the guide carriage.
2. To remove the brake piston (22), apply compressed air to its air
connection and blow it out (do not use sharp tools on the piston!).
!
Danger: hold the brake piston while blowing it out!
3. Remove the screws (24) and remove the brake lining (23) and O-
ring (9) from the brake piston (22).
4. Inspect the parts – replace any damaged or worn parts, e.g. the O-
ring (9) and the brake lining (23).
Dismantling of the Double Rail
1. Remove the cap plugs (5).
2. Remove the screws (4) and washers (3) and take the double rail (1)
off the cylinder.
3. If necessary: remove the end caps of the cylinder and push the
clamping profile out of the slot in the cylinder profile.
Reassembly of the Double Rail
1. Inspect the double rail (1) and replace it if necessary.
2. Clean all the parts.
3. If necessary: remove the end caps of the cylinder and push the
clamping profile into the slot in the cylinder profile.
4. Fit the double rail (1) and clamping profile (2) onto the cylinder with
the screws (4) and washers (3) (note the maximum torque),
centring the rails on the cylinder profile. The groove (X) on the side
of the double rail (1) must be on the piston side. The bearing surface
ACTIVE BRAKE
(Y) of the double rail (1), which is on the
same side as the groove (X), must be
positioned against the dovetail profile of
the cylinder profile.
5. Insert new cap plugs (5) flush with or slightly
below the surface of the double rail (1).
Reassembly of the Brake
1. Clean all the parts, the inside of the brake piston
chamber and the brake air connection.
2. Fit the brake lining (23) to the brake piston (22). Apply a locking
medium (Loctite low-strength is recommended) to the screws (24)
and tighten them.
3. Grease the walls of the brake piston chamber and the groove in the
brake piston lightly with guide grease.
!
Note: The brake lining must be grease-free.
4. Locate the O-ring (9) in the brake piston (22) and grease the O-ring
lightly.
5. Fit the brake piston (22) into the guide carriage (16).
6. Fit the springs (8) and plates (7). Apply a locking medium to the
screws (6) and tighten them (Loctite low-strength is recommended).
Reassembly of the Guide Carriage
1. Inspect the components: the pair of roller shoes (15), wiper (13) and
felt (12) and replace any damaged or worn parts.
2. Clean all the parts.
3. For adjustment of the roller shoes there is a fixed side and an
adjustment side. The roller shoe on the fixed side (15b) is secured
firmly to the underside of the guide carriage (16) with the screws
(14).
4. Place the three washers (17) in the roller shoe (15a) on the
adjustment side and fit it against the guide carriage (16) with the
screws (14). Tighten the screws (14) until the roller shoe lies fully
on the guide carriage but can still be moved.
5. Slide the complete guide carriage (16) carefully onto the guide rail
(1) with the side with the adjusting screw (19) towards the piston.
6. Adjust the roller shoes (15) with the set screw (19). The roller shoes
must be adjusted in the unloaded condition and there should be no
play at the loosest point on the double rail (1). At the tightest point
on the double rail the resistance to movement must not exceed the
maximum value.
The correct and maximum resistance to movement are as follows:
Ø cylinder (mm) Ø25
correct 1 N
maximum 6 N
7. First tighten the screws (14) with the specified torque and afterwards
tighten the both set screws(25) with the specified torque.
8. Fit the wiper covers (11), felts (12) and wipers (13) with the screws
(10).
9. Position the guide carriage (16) centrally over the piston of the
cylinder and secure the drive blocks (21) with the washers (18) and
screws (20).
Note: The drive blocks (21) must be fitted against the guide
carriage (16) with no play !!! See the correct torque in the table !!!
10.Refit the end caps, if applicable.
Lubrication
The roller guide is lifetime-lubricated.
Torques for Screws
Pos Ø25 Ø32
4 3 Nm 10 Nm
6 3 Nm 3 Nm
10 1,2 Nm 1,2 Nm
14 5,5 Nm 10 Nm
20 9 Nm 14,5 Nm
24 0,8-1 Nm 0,8-1 Nm
25 0,5 Nm 0,5 Nm
(Ø25 to 50 mm)
Ø32 Ø40 Ø50
1,5 N 2 N 3 N
9 N 10 N 12 N
Ø40 Ø50
10 Nm 10 Nm
3 Nm 3 Nm
1,2 Nm 1,2 Nm
10 Nm 20 Nm
14,5 Nm 14,5 Nm
0,8-1 Nm 0,8-1 Nm
0,5 Nm 0,5 Nm
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