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Cylinder [17] does not return.
Swollen Cylinder O-ring [16] (Use of
unsuitable oil causes swelling. Advise the
customer to use Shell Tonna Oil T32.)
Deformed Cylinder [17] or Cylinder Guide [22].
Yielded or broken Cylinder Spring [20].
Defective Head Cap and Gasket Set [10]
(worn rubber portion or broken)
Broken Gaskets (C) (F) [8] [6]
Loose Hex. Socket Hd. Bolt (W/Flange)
M6 x 45 [1]
Broken Exhaust Cover [4]
Loose Hex. Socket Hd. Bolt (W/SP. Washer)
M6 x 25 [3]
Broken Gasket (B) [5]
Damaged seal surfaces of Body Ass'y [26]
and Exhaust Cover [4]
Damaged Cylinder O-ring [18] or O-ring of
Cylinder Guide [22] (worn, deformed or
broken)
Defective Body Ass'y [26] (worn, corroded or
deformed)
Defective Urethane Ball (C) D7.14 [56]
(damaged or deformed)
Defective ball sheet surface of Trigger Valve
Bushing [58] (damaged, deformed or worn)
Defective Valve Packing [55] (damaged,
deformed or broken)
Soiled or damaged valve packing sheet
surface of Body Ass'y [26]
Incursion of foreign materials
Defective Gaskets (C) (F) [8] [6] (damaged or
yielded)
Deformed or broken Gasket (G) [23]
Defective O-ring [13] or Cylinder O-ring [14]
of the Cylinder Plate [15] (worn, deformed or
broken)
Defective Cylinder O-ring [16] (worn,
deformed or broken
Loose Hex. Socket Hd. Bolt M5 x 18 [40]
Broken Gasket (D) [38]
Defective seal surface of the Body Ass'y [26]
or Cap [39]
Defective Exhaust Valve
[9] (worn, deformed, or
broken)
Exhaust vent
Air leak part
Cause
When trigger valve/safety valve are OFF
When trigger valve/
safety valve are ON
Inspection priorities:
In the table below, possible causes of air leakage and their repair procedures are marked in accordance with the
likelihood of possible failure.
(1) First priority items are marked with an asterisk ( ).
(2) Second priority items (seal portions) are marked with a double circle ( ).
(3) Remaining items are marked with a single circle ( ). (See Parts List and exploded assembly diagram for part
name and location.)
Deformed Nose [33]
Loose Nylock Hex. Socket
Hd. Bolt M8 x 22 [32]
When trigger valve ON/
safety valve OFF
A
Exhaust cover
B
Nose
C
Nose
D
Trigger valve
E
Safety valve
F
Cap
G
Air will leak slightly from
the lower portion due to
construction.
Defective Plunger O-ring
[60] (worn, defomred or
broken)
Defective outside
O-ring [52] of Trigger
Valve Bushing [58]
Broken or cracked
Piston Bumper (B) [28]
Deformed Piston [12]
Deformed Nose [33]
Defective outside O-ring
[52] of the Valve Bushing
[51] (worn, deformed or
broken)
Defective plunger O-ring
[49] (worn, deformed or
broken)
Defective Plunger Spring
[48] (deformed or broken)
Defective safety Valve
Bushing [51] (deflected,
deformed or broken)
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