After-Sales Service And Customer Assistance - Bosch Professional GSN 90-21 RK Manual Original

OBJ_DOKU-25827-001.fm Page 21 Friday, March 25, 2011 10:01 AM
Problem
The nails are discharged very slowly and
with too little pressure.
The nails are driven in too deep.
The nails are not driven in deep enough. The rated pressure of the compressed-air supply is
The pneumatic tool skips nails or has a
too large cycle feed.
Frequent jamming of nails in the shot
duct.
The driven nails are bent.
Contrary to working with normal operat-
ing speed, the nails are not driven in
deep enough at higher operating speed.
Accessories
For more information on the complete quality accessories program,
please refer to the Internet under www.bosch-pt.com or contact your
specialist shop.
Bosch Power Tools
Cause
The rated pressure of the compressed-air supply is
too low.
The driver blade is damaged.
The sealing ring of the piston is worn or damaged.
The buffer is worn.
The length and diameter of supply-air hose 13 do not
correspond with the data of this pneumatic tool.
The supply-air hose 13 is bent/creased.
The rated pressure of the compressed-air supply is
too high.
The depth stop is set too deep.
The buffer is worn.
too low.
The depth stop is set too high.
The length and diameter of supply-air hose 13 do not
correspond with the data of this pneumatic tool.
The supply-air hose 13 is bent/creased.
The fasteners being used are not permitted.
The magazine 8 is not operating correctly.
The spring of the magazine slider is too week or de-
fective.
The sealing ring of the piston is worn or damaged.
The fasteners being used are not permitted.
The driver blade is damaged.
The interior diameter of the supply-air hose is too
low.
The compressor is not suitable for fast operating
speeds.

After-sales Service and Customer Assistance

Our after-sales service responds to your questions concerning mainte-
nance and repair of your product as well as spare parts. Exploded views
and information on spare parts can also be found under:
English | 21
Corrective Measure
– Increase the compressed-air supply. 8 bar may
not be exceeded.
– Use only the lubricants recommended by Bosch.
(See "Lubricating the Pneumatic Tool", page 20)
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Use a supply-air hose with the correct dimensions.
(See "Technical Data", page 17)
– Correct the bend/crease in the supply-air hose.
– Reduce the compressed-air supply. 5 bar may not
be fallen below.
– Adjust the depth stop to the desired depth.
(See "Adjusting the Depth Stop", page 19)
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Increase the compressed-air supply. 8 bar may
not be exceeded.
– Adjust the depth stop to the desired depth.
(See "Adjusting the Depth Stop", page 19)
– Use a supply-air hose with the correct dimensions.
(See "Technical Data", page 17)
– Correct the bend/crease in the supply-air hose.
– Use only original accessories.
Only the fasteners (nails, staples, etc.) specified
in table "Technical Data" may be used.
– Clean and lubricate the magazine slider 7 as re-
quired and make sure that the magazine 8 is not
dirty/soiled.
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Use only original accessories.
Only the fasteners (nails, staples, etc.) specified
in table "Technical Data" may be used.
– Contact an authorised service agent for Bosch
power tools.
– Contact an authorised service agent for Bosch
power tools.
Have the component replaced there.
– Use a supply-air hose with the correct dimensions.
(See "Technical Data", page 17)
– Use a compressor that is sufficiently dimensioned
for the number of connected pneumatic tools and
the operating speed.
1 609 929 Y30 | (25.3.11)