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

GB OPERATING INSTRUCTIONS FOR CYLINDER STBB 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 plate (22).
3. Unscrew the screws (20) with their washers (21), backing off each
screw a little at a time, so that the plate (22) does not tip and jam when
it is removed from the guide carriage (23).
4. Remove the plate (22) from the guide carriage (23).
5. Unscrew the drive block (27) from the piston of the cylinder so that
the guide carriage can be moved.
6. Loosen the screws (7) in the wiper cover (8).
7. For the diameters 40 and 50 only: remove one end capof the cylinder.
8. Slide the complete guide carriage (23) off the double rail (1).
9. Remove the wiper covers (8) with the felts (6) and wipers (9) from
both ends of the guide carriage (23).
10.Loosen and remove the screws (10) and separate the pair of roller
shoes (19) from the guide carriage (23).
Dismantling of the Brake
1. Remove the saucer springs (17) and pressure plates (18) and press
the brake piston (14) out of the guide carriage (23) from the brake
lining side.
2. Remove the screw (11) and remove the brake lining (12) and guide pin
(16) from the brake piston (14), and also the O-rings (13) and (15).
3. Inspect the parts – replace any damaged or worn parts such as the
O-rings (13) and (15) and brake lining (12).
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
10
PASSIVE BRAKE
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 (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. Centre the guide pin (16) on the brake piston with the help of the
pressure plate (18) and fit the brake lining (12) onto the brake piston
(14). Apply a locking medium to the screw (11) (Loctite low-strength
is recommended) and tighten it.
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-rings (13) and (15) in the brake piston (14) and grease
the O-rings lightly.
5. Fit the brake piston (14) into the guide carriage (23).
Reassembly of the Guide Carriage
1. Inspect the parts: the pair of roller shoes (19), wiper (9) and felt (6)
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 (19b) is secured
firmly to the underside of the guide carriage (23) with the screws (10).
4. Place the three washers (28) in the roller shoe (19a) on the
adjustment side and fit it against the guide carriage (23) with the
screws (10). Tighten the screws (10) until the roller shoe lies fully on
the guide carriage but can still be moved.
5. Slide the complete guide carriage (23) carefully onto the guide rail (1)
with the side with the adjusting screw (24) towards the piston of the
cylinder.
6. Adjust the roller shoes (19) with the set screw (24). 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 (10) with the specified torque and afterwards
tighten the both set screws(29) with the specified torque.
8. Fit the wiper covers (8), felts (6) and wipers (9) with the screws (7).
Lubrication
The roller guide is lifetime-lubricated.
Final Assembly
1. Position the guide carriage (23) centrally over the pistonof the cylinder
and secure the drive blocks (27) with the washers (25) and screws (26).
Note: The drive blocks (27) must be fitted against the guide
carriage (23) with no play !!! See the correct torque in the table !!!
2. Push the saucer springs (17) and
pressure plates (18) onto the guide pin.
Note: See the diagram for the correct
arrangement of the saucer springs
and pressure plates. According to
the brake type the numbers of saucer
springs (17) and pressure plates
(18) are different.
3. Lay the plate (22) on the pressure
plates (18).
4. Tighten the screws (20) with their washers (21) gradually and evenly
until the plate (22) lies flat on the guide carriage (23).
5. Refit the end caps of the cylinder, if applicable.
Torques for Screws
Pos Ø25 Ø32
4 3 Nm 10 Nm
7 1,2 Nm 1,2 Nm
10 5,5 Nm 10 Nm
11 0,8-1 Nm 0,8-1 Nm
20 5,5 Nm 10 Nm
26 9 Nm 14,5 Nm
29 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
1,2 Nm 1,2 Nm
10 Nm 20 Nm
0,8-1 Nm 0,8-1 Nm
10 Nm 10 Nm
14,5 Nm 14,5 Nm
0,5 Nm 0,5 Nm