Festo DGC G Series, Инструкции по ремонту

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16 / 48 Festo 07DGC-Ga_en
Repair steps 4
This chapter describes how to completely dismantle the linear drives and the individual components or sub-assemblies
within self-contained sub-chapters. The linear drive does not need to be completely dismantled for every fault in order to
replace faulty components. The complete dismantling process described here is designed to provide a complete overview
of the components and how they are accessed in case they need to be replaced. The cause of a defect must therefore
always be determined before starting a repair.
Note
The repair should preferably be carried out on a stable and flat work surface with storage for small parts.
Before dismantling the linear drive, it is imperative that the cause of the failure is investigated to prevent, for example,
repeated and premature failure. A linear drive which has been used as intended will not normally exhibit any premature
signs of failure.
This is not necessary in the case of non-premature failure (fatigue time). However, the condition of the slide (wear on
the slide elements, the slide guide setting for sizes DGC-8 and DGC-12, e.g. noticeable bearing clearance, faulty sliding
performance and increased sliding noises etc.), the piston with all components in the cylinder barrel (e.g. piston seals,
sealing band, cover band, buffer) and all sealing rings should also always be assessed. If in doubt, it is recommended to
replace all the components mentioned so as to rule out reciprocal effects during later operation.
If the linear drive suffers premature failure, the operating conditions should be examined more closely.
The following possibilities should be considered, among others:
Overloading •
In case of overloading the application parameters (mass, speed, operating pressure, operation medium) should be
adjusted accordingly.
Ambient conditions/material resistance
•
Check whether the ambient temperature is within the permissible range.
Check the chemical and physical ambient conditions for hazardous substances, such as dust, abrasive particles, cool-
ing lubricants, solvents, ozone, radiation, water-soluble greases and oils, etc.
The following chapters describe how to dismantle the different sizes of the linear drives:
Linear drives DGC-8/12-…-G (see • chapter 4.1).
Linear drives DGC-18/25/32/40-…-G (see • chapter 4.2).
Linear drives DGC-50/63-…-G (see • chapter 4.3).