Festo DHTG - Dismantling and repairs; Replacing the integrated shock absorber

DHTG
14 Festo – DHTG – 2018-02e English
 Replace the shock absorber when it shows one of the following signs of wear, or every 10 million
strokes at the latest.
 Check whether lubrication/testing must be carried out more frequently.
This may be necessary in case of:
– High temperatures
– Excessive dirt
– Fat solvent fluids or fumes in the vicinity.
9 Dismantling and repairs
 Recommendation: Return the product to our repair service for overhaul.
The necessary fine adjustments and tests will then be taken into account.
 Information about spare parts and aids can be found at: www.festo.com/spareparts
 Switch off the power supplies:
– Operating voltage
– Compressed air
 Exhaust the system and the product.
Replacing the integrated shock absorber:
1. Unscrew the flow-control screw aJ.
2. Unscrew the fastening screws (M) on the sub-base.
3. Using pliers, remove the retaining ring on the shock absorber.
4. Replace the shock absorber.
5. Fit the individual parts again in reverse sequence (tightening torque è Tab. 16).
(M)
aJ
Fig. 13
Tightening torque
Size 65 90 140 220
Flow control screw aJ [Nm] 1.5 1.5 5.5 5.5
Fastening screws (M) [Nm] 2.9 2.9 9.9 9.9
Tab. 16