• Place the pulley back in position following guidelines
explained in § 4.3.
• Engage the tension setting screw on the tension axis
hole
• Engage belts and set tension as describe in § 4.3
4.6 Safety valve - Check valve inspection
Check adjustment of the safety valve :
Remove the check valve and make sure that the valve
operates freely.
The procedure to check the setting value is the following :
• If the package is not equipped with a discharge pres-
sure gauge, install a pressure sensor on point shown
on the sketch below.
• To prevent any damage to the tank during the relief
valve setting pressure check, disconnect the pack-
age outlet from the tank inlet.
• Connect the package outlet to a line including a clo-
sing valve.
• Open fully the closing valve.
• Start the truck engine and engage the compressor.
• Gradually close the valve to the point where the relief
valve opens, do not allow overpressure to the com-
pressor.
• Read the pressure value. This value is the crack
pressure.
• Fully close the valve, do not allow overpressure to
the compressor.
• Read the pressure value. This value is the full flow
pressure.
• Open the closing valve fully, disengage compressor
and stop engine.
The full flow setting pressure should be compliant with the
values given in § 1.3.3 maximum discharge pressure.
4.7 Mounting procedure for the transmission
pulley axis
Remove all scratch and burr from the aluminum bushing
Remove all scratch and burr from the aluminum bushing
from the keyway.
Press the roller bearing onto the shaft, on the pulley side.
Fill in the roller bearing with grease.
Remove the side protection of the ball bearing, and fill in
it with grease.
Pressure port
for relief valve
setting check
14/21
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