Festo DFST-32 G2 Series, Operating Instructions, Page: 4 / 4

9.2 Lubrication
• After every cleaning grease the following components with LUB-KC1
è www.festo.com/spareparts:
15 Bolt of the stop roller
16 Bolt of the toggle lever
4 Piston rod
3 Guide rod for protection against
rotation
17 Grease thrust bolt on the front side
Fig. 15 Lubrication points
• With DFST-...-L with lever locking mechanism: also grease all bearing points
of the moving parts.
9.3 Fault Clearance
Malfunction Possible cause Remedy
Wear on one side of
the guide rod Transported material
impacts diagonally on
the toggle lever Align stopper cylinder in the direction of trans-
port, transported material must meet the toggle
lever vertically.
Cushioning incorrectly
set Correct cushioning
Conveyor speed too
high Reduce velocity
Hard impact on the
toggle lever
Shock absorber faulty Replace shock absorber
(
è spare parts catalogue, www.festo.com)
Tubing connection
error Check blanking plug
Check tubing connection Piston rod in initial
position despite pres-
surisation
Reduced flow rate
through elbow con-
nectors Avoid elbow connectors
Cushioning incorrectly
set Correct cushioning Toggle lever does not
reach end position
Transported material
load (push-through
force) too low – Increase load
– Increase coefficient of friction between con-
veyor and material
– Increase slope of conveyor
Tab. 4 Fault Clearance
9.4 Repair
WARNING!
Risk of injury caused by ejected components.
Springs under tension and compressed air eject the piston cap outwards when
demounting the retaining ring.
•
Never release the retaining ring on the bottom of the product.
• Open the product only by unscrewing the fitting between the flange cover and
cylinder barrel.
S Retaining ring
Fig. 16 Do not release retaining ring
Replacing the Shock Absorber
18 Retaining screw stop
19 Stop
7 Thrust bolt
10 Knurled nut
20 Shock absorber
Fig. 17 Replace shock absorber
1. Loosen the detent for the knurled nut 5 .
2. Loosen the retaining screws aH from the stop and remove the stop aI .
3. Remove the knurled nut aJ with the thrust bolt 7 .
4. Replace shock absorber bJ .
5. Attach knurled nut aJ with thrust bolt 7 .
6. Attach the stop aI and screw in the retaining screws aH .
7. Tighten the detent for the knurled nut 5 . Tightening torque 1.5 Nm.
10 Disposal
Dispose of the product and packaging at the end of its useful life through environ-
mentally friendly recycling in accordance with applicable regulations.
11 Technical Data
Size 32
Constructive design Piston rod with toggle lever
Mode of operation – Double-acting with spring (extending)
– With lever locking mechanism
Mounting position Vertical
Operating medium Compressed air to ISO 8573-1:2010 [7:–:–]
Operating pressure range [MPa] 0.2 … 1
[psi] 29 … 145
[bar] 2 … 10
Pneumatic connection G1/8
Reset force
Reset force of the toggle
lever (max.) [N] 4
Reset spring of the piston rod
(min.) [N] 20
Cushioning
Cylinder Elastic cushioning rings/plates, at both ends
Toggle lever Adjustable shock absorber
Ambient temperature [°C] +5 … +60
Materials
Cover, housing Aluminium
Piston rod High-alloy stainless steel
Attachments Cast steel, nickel-plated
Screws Steel
Rollers POM, steel (with DFST-...-S)
Seals NBR
Weight [g] 750
Tab. 5 Technical Data