Correction Of Malfunctions - Bosch GSN 90-21 RK Original Instructions Manual

OBJ_BUCH-1037-001.book Page 29 Tuesday, December 8, 2009 1:03 PM

Correction of Malfunctions

Problem
The pneumatic tool is ready for
operation but no nails are dis-
charged.
The nails are discharged very
slowly and with too little pres-
sure.
The nails are driven in too deep. The rated pressure of the compressed-
Bosch Power Tools
Cause
A nail is jammed in the shot duct.
The magazine slider is 7 defective.
The spring of the magazine slider is too
week or defective.
The fasteners being used are not
permitted.
The magazine 8 is empty.
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.
air supply is too high.
The depth stop is set too deep.
The buffer is worn.
English | 29
Corrective Measure
– Clear the jam.
(See "Clearing Jams", page 26)
– Clean and lubricate the magazine slider
7 as required 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.
– Use only original accessories.
Only the fasteners (nails, staples, etc.)
specified in table "Technical Data" may
be used.
– Refill the magazine.
(See "Loading the Magazine", page 24)
– Increase the compressed-air supply.
8 bar may not be exceeded.
– Use only the lubricants recommended
by Bosch.
(See "Lubricating the Pneumatic Tool",
page 27)
– 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 23)
– Correct the bend/crease in the supply-
air hose.
– Reduce the compressed-air supply.
4 bar may not be fallen below.
– Adjust the depth stop to the desired
depth.
(See "Adjusting the Depth Stop",
page 26)
– Contact an authorised service agent for
Bosch power tools.
Have the component replaced there.
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