12
PrOBleM SyMPTOMS reSOlUTION
Excessive air tank
pressure – safety
valve pops off
Pressure switch does not
shut of motor when com-
pressor reaches cut-out
pressure
Pressure switch cut-out
too high
•
•
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
•
•
Air leaks Tube ttings are not tight
enough
•Tighten ttings where air can be heard
escaping. Check ttings with soapy water
solution. Do not overtighten.
•
Air leaks in air tank or
at air tank welds
Defective air tank• 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.
•
•
Air leaks between
head and valve plate
Leaking seals• Contact a Bosch factory service center or a
Bosch authorized service center
•
Air leaks from safety
valve
Defective safety valve•Operate safety valve manually by pulling on
ring. If valve still leaks, it must be replaced.
•
Knocking noise Defective safety valve
Pump oil is low
Carbon build-up in pump
•
•
•
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
•
•
•
Pressure reading on
the regulated pres-
sure gauge drops
when an accessory
is used
Regulator is not adjusted
correctly for accessory
being used
• It is normal for some pressure drop to oc-
cur when an accessory is used, adjust the
regulator.
note: Adjust the regulated pressure under
ow conditions while accessory is being
used.
•
•
TROUBLE SHOOTING
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 qualied Bosch technician or your dealer.