Operating instructions
Inspection and servicing
12
104485 • 03/03
5.10 Checking and adjusting the V-
belt
Checking V-belt tension
1
5
F
Fig. 6: Checking V-belt tension
!
Apply a perpendicular force between 25 N
and 35 N in point 1 using a dynamometer.
!
In doing so, the belt must give approx.
5mm.
Changing V-belt tension
!
Loosen lock nut at adjusting screw 19.
!
Adjust V-belt tension using a second nut.
5.11 Notes on systems equipped
with water cooling system
In water-cooled screw compressors, the oil/air
cooler is replaced by a plate heat exchanger,
and the air-to-air cooler is replaced by a tube
bundle heat exchanger. You can use fresh
water as cooling water. It is recommended to
install a sand and a dirt filter before the cool-
ing water preliminary flow.
5.12 Tighten the screw connections.
After first commissioning, check and –
if required – retighten all screws.
!
Tighten all screw connections in regular
intervals.
!
In doing so, observe the torque (cf. table 3:
Torques).
Screw Maximum
torque
M 8
25 Nm
M 10
50 Nm
M 12
85 Nm
Tab. 3: Torques
5.13 Checking electric terminals
!
Check and – if required – tighten all elec-
tric terminals regularly.
5.14 Relubricating/replacing
motor
mounting
!
Relubricate or replace the motor mounting
as specified by the manufacturer (refer to
the name plate of the motor).
5.15 Cleaning dust preliminary filter.
!
Pull dust preliminary filter 31 (see fig. 1:
Component overview) out of holder.
!
Blow compressed air through the
dust
preliminary filter
until dust and deposits
have disappeared.
