www.graessner.de
gmb / BA DynaGear_EN
Page 19 of 22
11. Inspection and maintenance
11.1 General notes
All maintenance and service work may only be carried out by qualified personnel.
See "Safety Instructions 3.2"
The gear unit must always be shut down for maintenance and repair work.
The drive unit must be secured against unintentional start-up (key switch, lock) and an information sign must be
attached indicating that work is being carried out on the gear unit.
Warning
:
High risk of injury due to unintentional start-up of the drive!
Before commencing any maintenance work, secure gear unit against any start-up!
Warning
:
High risk of injury from dismantling transmission parts (couplings, jointed shafts,
belts, etc.) while torsional forces are still acting on the gear shafts!
Secure gear shafts against torsional forces and disassemble transmission
elements.
11.2 Service intervals
Non-compliance with the maintenance intervals can cause severe damage to the gearbox and the plant.
Therefore, it must be ensured that these maintenance intervals are observed.
Measures
Service intervals
Remarks
Check running noise for any changes
daily
Check gear unit for leakage
daily
Check oil level
monthly
Carry out first oil change
500 operating hours after commissioning
Chapter 11.3
Carry out additional oil changes
mineral oil filling
Every 24 months or 10000 operating
hours
Chapter 11.3
Carry out additional oil changes
synthetic oils
Every 4 years or 20000 operating hours
Chapter 11.3
Check gear unit condition
Every 2 years
Chapter 11.4
11.3 Oil service life
The oil service life at 80°C average oil temperature in the gear unit without serious changes in the oil qualities is
specified by the oil manufacturers as a minimum value:
•
For mineral oils, biodegradable oils, and physiologically harmless oils: 2 years or 10,000 operating hours
•
For synthetic oils (polyalphaolefins and polyglycols): 4 years or 20,000 operating hours
Note on oil service life
The actual oil service life may be longer, and at operating temperatures above 80°C also lower.
Here, the rule applies that a temperature increase of 10°C approximately halves the service life of the oil.
