KAESER KOMPRESSOREN SX, Service Manual, Page: 67 / 122

Replace the drive belts
The drive motor must be moved in its bracket to change the belts. Use the appropriate tool and support
the motor during belt changing.
Fig. 20 Changing the belt
1
Fixing screw
2
Pivot point fixing screw
3
Tensioning nut
4
Markings
5
Tensioning device
1. Loosen the tensioning nut
3
by ca. 10 mm.
2. Remove the fixing screws
1
.
3. Loosen the pivot point fixing screw
2
only sufficiently to allow the motor to shift to the side.
4. Move the motor to the side and fix it in position with a screw
1
.
5. Place the new belts over the pulleys.
6. Ensure that all fixing scres
1
are loosened.
7. Tighten the belts by means of the tensioning nut
3
until the markings
4
coincide.
8. Tighten one fixing screw
1
to hold the motor in place then tighten the rest
1
and
2
.
Result The drive belts are sufficiently tensioned.
It is not necessary to retension the belts.
10.9 Checking the cooling oil level
The oil level can be checked safely through the viewing window. The oil indicator should be fully filled
with oil when the machine is at standstill. The correct oil level cannot be seen.
The ideal situation is with the oil level around the optimum mark when the machine is running.
Operating state Minimum oil level Maximum oil level
LOAD
Tab. 45 Permissible cooling oil level under LOAD
Precondition The machine has been running at least 5 minutes under LOAD.
10 Maintenance
10.9 Checking the cooling oil level
9_6919 04 E
Service Manual Screw Compressor
SX SIGMA CONTROL BASIC
57