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15. PREVENTIVE MAINTENANCE
1. PROCEDURES BEFORE BEGINNING MAINTENANCE.
ATTENTION
There are hot surfaces inside the compressor cabinet after its stop.
A. Disconnect the compressor and make sure the tank has no pressure (wait for five minutes).
B. Disconnect the compressor from the power supply (disconnecting switch) and make sure the compressor cannot be inadvertently turned
on.
For compressors with remote command the used in group, you must put up a sign "In Service", on the start switch.
C. Open the valve between the compressed air system and the compressor.
2. PROCEDURES AFTER MAINTENANCE
A. Open the valve between the compressed air system and the compressor.
B. Connect the compressor to the power supply (disconnecting switch) and make sure the compressor can be turned on without causing
any accidents.
C. Start the compressor.
3. PROCEDURE TO ADJUST THE TENSION OF THE BELT
The tension of the belt must be checked weekly.
In case the tension is not within the specification of Table 17.1, the procedure below must be performed in order to adjust the tension of the
compressor belt properly:
A. See item 1 - Procedures before beginning maintenance.
B. Loose the bolts 1 (4 units).
C. Tighten the bolts 2 alternately so as to keep the air end lined up until the belt presents the proper tension as per table 17.1
D. If the tension of the belt is correct, tighten bolts 1; otherwise, repeat the previous steps.
Notes:
• With the compressor operating at maximum pressure, if the belt describes and arc on the driven pulley as if it were trying to get out of
the grooves, the tension is incorrect.
• At the ideal tension, the belt touches all the traction arc of the driven pulley (right side).
• To measure the force, use a tensiometer, which must be purchased at a SCHULZ AUTHORIZED DEALER.
• When the tension of the belt is not correct, there is overheating and typical noise indicating the belt is slipping.
Load
X
Model
(Kgf)
N (Newton)
(cm)
Min. Max. Min. Max.
Scroll
3,0
4,5
29,4
44,1
0,5
FIGURA 17.1 - BELT TENSION
TABLE 17.1 - BELT TENSION
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