Prinoth BISON Operating And Maintenance Manual page 243

Snow groomer BISON
1. Park the vehicle on a level surface at operating temperature.
2. Wait at least 10 min before measurement so that the oil can set.
3. Turn the drum so that the oil drain plug (3) is at the lowest point.
4. Clean the surroundings of the oil filler screw (1), oil level screw (2) and oil drain plug (3).
5. Remove oil fill screw (1) and oil level screw (2).
6. Place a suitable collecting container under the oil drain plug (3).
7. Carefully remove the oil drain plug (3) and drain off the oil.
8. Once the oil has drained, screw the oil drain plug (3) back in with a new sealing ring and tight-
en.
9. Slowly fill the gearbox with the specified gear oil via the filler opening made accessible by the
oil fill screw (1). The oil level must reach the threaded hole in the oil level screw (2), but must
never be above it.
10. Insert the oil level screw (2) and oil fill screw (1) again.
11. Check that all screws are firmly seated.
■ Changing gear oil using the winch cooling pump
Pos. Name
1
2
1. Park the vehicle on a level surface at operating temperature.
2. Turn the drum until the oil drainage pipe is at the lowest point. Remove the plug and drain the
oil.
3. Open the gear oil suction filter and check for particles. Contact Prinoth customer service if you
find any large, coarse metallic particles in the filter.
4. Drain all the oil, including the oil from the adjoining pressure hoses.
5. Clean the suction filter as specified and then reinstall it.
6. Disconnect the pressure hose (protruding from the cooler) from the gearbox.
7. Insert the transparent intake hose (2) into a canister containing new gear oil.
8. Turn the ball valve (1) in reverse; see figure.
BISON 908930245 - 30367
Figure 136: Winch cooling pump
Ball valve
Intake hose
15 - AUTOMATIC Winch
Operating and Maintenance Manual
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