SMC Networks RSDQx12 series, Operation Manual

Page: 11 / 14

- 10 -
Please do not remove the grease applied to the piston rod end of the built-in shock absorber and periodically check the
condition of the grease.
10. Maintenance Service
10-1. Maintenance of cylinder
①
When cylinder fails to function due to air leakage or breakage of the shock absorber, replace the seal kit and
the shock absorber. Refer to the tables below, and Component Parts table, for orderable part numbers.
②
φ
12 bore seal kit replacement: Remove two rod cover mounting screws shown in Figure 5. Pull piston rod
assembly and rod cover assembly out of cylinder tube. After replacing seals, insert piston rod assembly and
rod cover assembly in to cylinder tube. Apply glue for screw to rod cover mounting screws and reinsert in to
cylinder assembly.
Tightening torque is 0.63N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 3mm
φ
16 to 50 bore seal kit replacement: Remove hexagon socket head set screw in cylinder tube near rod end
port. Getntly secure the flats of the cylinder tube in a vice with rod cover positioned up. Hold the flats of the
rod cover with a spanner or adjustable wrench and turn counter-clockwise to loosen and remove the rod cover.
After replacing seals, tighten rod cover to cylinder tube to a point 2 to 3 degrees more than the original position.
Apply glue for screw, to hexagon socket head set screw, then fix the rod cover by reinserting and retightening
set screw.
φ
16
:
Tightening torque is 12 N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 18mm.
φ
20
:
Tightening torque is 15.3 N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 22mm.
φ
32
:
Tightening torque is 33.1 N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 32mm.
φ
40
:
Tightening torque is 39.3 N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 41mm.
φ
50
:
Tightening torque is 41.4 N
・
m
±
10(%). Tool
：
Hexagon wrench: Width across flats 50mm
10-2. Replacement procedure of shock absorber
①
Loosen the hexagon socket head set screw (M3) at the piston rod by approximately one turn, and push
down the lever. (See Fig. 11)
Tool
：
Hexagon wrench: Width across flats 1.5mm
②
While pushing down the lever, remove the shock absorber and replace it with a new shock absorber.
Tighten the hexagon socket head set screw (M3 x 0.5) of the piston rod. (See Fig. 12)
Stop tightening around 1/4 turn after the set screw comes into contact with the shock absorber.
If the hexagon socket head set screw is tightened too much, operation failure of the shock absorber can
result.
Tightening torque: 0.29N
・
m
Tool
：
Hexagon wrench: Width across flats 1.5mm
③
After replacing the shock absorber, apply grease to the piston rod end of the shock absorber.(See Fig.13)
Replacement part: Shock absorber
Bore size Part no.
32 RB1007-X225
40
・
50 RB1407-X552
Fig. 11
Lever
Push down
Hexagon socket head set screw