nord 6052902/0213, Руководство с инструкциями по установке, Страница: 62 / 128

Industrial gear units – Manual with installation instructions
62 B 1050 en-3921
The connecting flange between the industrial gear unit and the auxiliary gear unit is always equipped
with a pressure venting device. This device, as well as the pressure venting device on the industrial
gear unit (only for ATEX-certified gear units) must be unlocked as shown in Figure 30.
Legend
1: Vent screw
2: Transport securing device
Locked Unlocked
Figure 30: Activation of the pressure vent
4.3 Taconite seal/Labyrinth seal
This sealing combination consists of a radial shaft sealing ring and a grease-filled dust seal (labyrinth
seal). This type of seal is recommended for especially dusty environments.
If Taconite seals are installed, check there is a grease-filled gap between the bearing cover plates.
Re-greasing is carried out via the conical grease nipple. Observe the re-greasing intervals (see
maintenance table).
Legend
1: Bearing cover 1
2: Grease-filled gap
3: Conical grease nipple
4: Bearing cover 2
Figure 31: Checking a Taconite seal
As standard, the grease nipple is located directly on the bearing cover.
In the case of covers or IEC cylinders, lubrication lines are installed on the gear unit to enable easy re-
lubrication. In this case, obtain the lubrication positions from the specific dimension sheet for the order.
Information
For reliable operation, labyrinth seals require a stationary, horizontal installation position without dirty
water or high levels of dust.
Overfilling the gear unit and/or a large amount of foam may result in leakage.