nord 6052902/0213, Руководство с инструкциями по установке

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Industrial gear units – Manual with installation instructions
76 B 1050 en-3921
5.2 Service and maintenance work
5.2.1 Visual inspection for leaks
The gear unit must be checked for leaks. Attention should be paid to escaping gear oil and traces of
oil on the exterior or underneath the gear unit. In particular, the radial shaft seals, cover caps, screw
fittings, hoses and housing joints should be checked.
Information
Radial shaft seals are components with a limited life and are subject to wear and ageing. The service
life of radial shaft seals depends on various ambient conditions. Temperature, light (especially UV
light), ozone and other gases and liquids affect the ageing process of radial shaft seals. Some of
these influences may change the physical or chemical properties of the radial shaft seals and result in
a significant reduction of their service life. Foreign matter (e.g. dust, sludge, sand, metallic particles)
and excess temperature (excessive speed or external heating) accelerate the wear of the sealing lip.
These sealing lips are made of an elastomer material and are lubricated with a special grease at the
factory. This reduces the wear due to their function and ensures a long service life. An oil film in the
region of the rubbing sealing lip is therefore normal and is not due to leakage (see chapter 7.7
"Leakage and leak-tightness").
NOTICE
Damage to the radial shaft seals through unsuitable cleaning agents
Unsuitable cleaning agents may damage the radial shaft seals, which may then cause an increased
risk of leaks.
• Do not clean the gear unit with cleaning agents which contain acetone or benzol.
• Avoid contact with hydraulic oils.
If leaks are suspected, the gear unit should be cleaned, the oil level checked and checked again for
leaks after approx. 24 hours. If a leak is confirmed (dripped oil), the gear unit must be repaired
immediately. Please contact the NORD service department.
5.2.2 Check for running noises
If the gear unit produces unusual running noises or vibrations, this could indicate damage to the gear
unit. In this case the gear unit must be repaired immediately. Please contact the NORD Service
department.
5.2.3 Check fan and spaces between the ribs (Maxxdrie XT) (Option: FAN-A, FAN-R)
Keep the inlet and outlet on the fan cover and the fan wheel free from dirt.
Fan operation increases the probability of dirt and dust deposits in the spaces between the cooling
webs of a ribbed gear unit housing (Maxxdrive XT). This will reduce the thermal dissipation
performance of the housing. As a consequence, the gear unit is no longer cooled sufficiently. Clean
the spaces between the ribs.
Pay attention to the information from Section 4.6 "Gear unit cooling with fan (Option: FAN-A, FAN-R)".
prior to commissioning again.