Asco Joucomatic 448 Serie Puesta En Marcha Y Consejos De Utilización página 12

GB OPERATING INSTRUCTIONS FOR STB 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 and brake lines and switch off all
electrical power supply.
2. Remove all parts mounted externally on the guide carriage (15).
3. Unscrew drive block (20) from piston of cylinder, so that the guide
carriage can be moved.
4. For the diameters 40 and 50 only: unscrew one end cap of the
cylinder.
5. Loosen the screws (10) on the wiper cover (11).
6. Slide the complete guide carriage off the guide rail.
7. Unscrew the wiper cover (11) from both ends of the guide
carriage (15).
8. Inspect the parts – replace damaged or worn parts such as:
wiper (13), slide profile (14) and felt (12) (service kit).
Dismantling of the Brake
1. Remove screws (5) and remove the plates (6) and springs (7) from
the guide carriage.
2. To remove the brake piston (21), apply compressed air to its air
connection and blow it out (do not use sharp tools on the piston!).
!
Hold the brake piston while blowing it out!
3. Remove screws (23) and remove the brake lining (22) from the
brake piston (21) and the O-ring (8).
4. Inspect the parts – replace damaged or worn parts such as: O-
ring (8) and brake lining (22).
Dismantling and Reassembly of the Guide Rail
1. Remove the screws (4) with their washers (3). Remove the guide
rail (1) and clamping rail (2) from the cylinder profile.
2. Clean all the parts.
3. Centre the guide rail on the cylinder profile.
4. Secure the guide rail (1) and clamping rail (2) with the screws (4)
and their washers (3) (use the specified torque).
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 (22) to the brake piston (21). Apply a locking
medium (Loctite low-strength is recommended) to the screws (23)
and tighten them.
10
ACTIVE BRAKE
3. Grease the walls of the brake piston chamber and the groove in
the brake piston lightly with guide grease.
!
The brake lining must be grease-free.
4. Locate the O-ring (8) in the brake piston (21) and grease the O-
ring lightly.
5. Fit the brake piston (21) into the guide carriage (15).
6. Fit the springs (7) and plates (6). Apply a locking medium to the
screws (5) and tighten them.
Reassembly of the Guide Carriage
1. Clean all the parts.
2. Grease the felts (12) with guide grease.
3. Lay the wipers (13) and felts (12) in the wiper covers.
The sealing lip of the wiper must be outwards (see drawing).
4. Back off the adjusting screws (18) in the guide carriage.
5. Lay in the support strip (9) on the same side as the adjusting
screws.
6. Place 2 slide profiles (14) per side in the guide carriage.
The edges of the slide profiles in which grooves are cut (to allow
grease from the grease nipples to get to the guide rail) must touch
each other.
7. Screw on the two wiper covers (11) loosely with the screws (10).
Remounting the Reassembled Guide Carriage on the Guide Rail
1. Push the complete guide carriage assembly carefully onto the guide
rail with the side with the adjusting screws towards the piston.
2. If necessary move the felt wiper carefully into its correct position
with a screwdriver.
Adjustment of Play
1. Tighten the self-locking adjusting screws (18), individually from
the middle working outwards, with the specified torque. If non-self-
locking screws are used (18), use a screw locking system (Loctite
low-strength is recommended) and tighten the screws from the
middle working outwards until the guide carriage can no longer be
moved by hand.
2. Tap the sides of the guide carriage (15) gently with a rubber hammer
until the slide profiles (14) have settled into position and then tighten
all the adjusting screws (18) again (see above).
3. Loosen all the adjusting screws (18) about 1/4 to 1/2 turn
individually from the middle working outwards.
When correctly adjusted the guide carriage should be easily
movable by hand but with no play.
4. Tighten the screws (10) in the wiper cover (11) with the prescribed
torque.
Lubrication
1. All unused threaded holes in the guide carriage (15) must be
plugged with set screws (16) to prevent escape of lubricant. The
grease nipples on both sides of the guide carriage (15) should be
filled with guide grease until a thin film of grease can be seen on
the guide rail when the guide carriage is moved by hand.
Final Assembly
1. Position the guide carriage centrally over the cylinder piston and
secure the drive blocks (20) with the washers (17) and screws
(19).
Note: The drive blocks (20) must be fitted against the guide
carriage with no play (15) !!! See the table for the correct
torque !!!
2. Refit the end cap of the cylinder, if applicable.
Torques for Screws
Item Ø25 Ø32
4 3 Nm 3 Nm
5 3 Nm 3 Nm
10 5.5 Nm 5.5 Nm
3.5-4 Nm 3.5-4 Nm
18
(only self-locking screws)
19 9 Nm 14.5 Nm
23 0.8-1 Nm 0.8-1 Nm
(Ø25 to 50 mm)
Ø40 Ø50
10 Nm 10 Nm
3 Nm 3 Nm
5.5 Nm 5.5 Nm
3.5-4 Nm 3.5-4 Nm
14.5 Nm 14.5 Nm
0.8-1 Nm 0.8-1 Nm