Troubleshooting - Bosch CGT8-65W Operating/Safety Instructions Manual

This section provides a list of the more frequently encountered malfunctions, their causes and correc-
tive actions. The operator or maintenance personnel can perform some corrective actions, and others
may require the assistance of a qualified Bosch technician or your dealer.
PrOBleM
Excessive air tank
pressure – safety
valve pops off
Air leaks
Air leaks in air tank or
at air tank welds
Air leaks between
head and valve plate
Air leaks from safety
valve
Knocking noise
Pressure reading on
the regulated pres-
sure gauge drops
when an accessory
is used

TROUBLE SHOOTING
SyMPTOMS
• Pressure switch does not
shut of motor when com-
pressor reaches cut-out
pressure
• Pressure switch cut-out
too high
• Tube fittings are not tight
enough
• Defective air tank
• Leaking seals
• Defective safety valve
• Defective safety valve
• Pump oil is low
• Carbon build-up in pump
• Regulator is not adjusted
correctly for accessory
being used
reSOlUTION
• Set the On/Off switch to Off, if the unit
does not shut off contact a Bosch fac-
tory service center or a Bosch authorized
service center
• Contact a Bosch factory service center or a
Bosch authorized service center
• Tighten fittings where air can be heard
escaping. Check fittings with soapy water
solution. Do not overtighten.
• Air tank must be replaced. Do not repair
the leak
• Warning: Risk of bursting. Do not drill into,
weld or otherwise modify air tank or it will
weaken. The air tank can rupture or ex-
plode.
• Contact a Bosch factory service center or a
Bosch authorized service center
• Operate safety valve manually by pulling on
ring. If valve still leaks, it must be replaced.
• Operate safety valve manually by pulling on
ring. If valve still leaks, it must be replaced.
• Add 30W non detergent oil to pump.
• Contact a Bosch factory service center or a
Bosch authorized service center
• It is normal for some pressure drop to oc-
cur when an accessory is used, adjust the
regulator.
• note: Adjust the regulated pressure under
flow conditions while accessory is being
used.