Tomoe T-DYNAMO 7E, Instruction Manual, Page: 26 / 32

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(4) Insert the connecting pin ㉚ into the yoke ③ and
fix with the sunk plug ㉛ . Apply Loctite to the sunk
plug. [Fig. 31]
Loctite ： Henkel Corporation Loctite 242 or 243
(5) Replace all the O-rings mounted on the piston ⑤ .
[Fig. 33]
(6) Apply grease (lithium soap-base, consistency
No.2) to the groove of the piston ⑤ and the piston
packing ㉔ . Please use the application amount
shown in [Table 10].
(7) Install the piston packing ㉔ and the wear ring ⑰
to the piston ⑤.
(8) Before inserting the piston ⑤ ASSY into the
case , apply grease (lithium soap-base, consis-
tency No.2) to the sliding area of the piston ⑤ , the
inner surface of the case ① , and the bearing outer
surface.
Apply grease (MOLYKOTE G paste grease) to the
yoke U groove. Please use the application amount
shown in [Table 11].
(9) Place the case ① and the piston ⑤ in the direc-
tion shown in [Fig. 33]. Be careful of the direction
because assembly direction of the piston is
different between pressure-opening (7G) and
pressure-closing (7F) of single-acting type cylin-
ders. Make sure that parts are installed in the
direction shown in [Fig. 33] when the cylinder is
seen from the top. [Fig. 32][Fig. 33]
(10) Insert the pistons ⑤ into the right and left sides of
the case ① .
Align the parallel pins ㉜ right and left on the
pistons ⑤ with the U grooves on the yoke ③ .
Then insert the shaft while turning the shaft in the
direction of the arrow.
After assembly, turn the shaft to ensure the free
movement of the piston. [Fig. 33]
• Insert the connecting pin ㉚ after making sure that the
pin hole of the yoke ③ and the pin hole of the shaft ②
are aligned.
• Insert the connecting pin ㉚ into the tapped hole of the
yoke ③ . [Fig. 31]
Assembly direction of the piston ⑤ ASSY for pressure-
opening single-acting type cylinder is different from that
of pressure-closing. Assembly with wrong direction
causes defective operation, such as reverse
opening/closing operation of the valve.
Align the parallel pin ㉜ that is the part of the piston
with the U-shaped notch on the yoke. Match with the
shaft rotation and push it in.
Yoke ③
Sunk plug ㉛
Yoke ③
Connecting pin ㉚
Sunk plug ㉛
[Fig. 31]
[Fig. 32]
[Fig. 33]
Table 11 Grease application amount (Piston, Yoke, Case, Bearing)
Piston installation orientation of double-acting type cylinder
and pressure-opening single-acting type cylinder (7G)
Piston installation orientation of pressure-closing
single-acting type cylinder (7F)
Turn in the
arrow direction!
Parallel pin ㉜
Piston ⑤
Piston
packing ㉔
Wear ring ⑰
Parallel pin ㉜
Yoke ③
Case ①
Piston ⑤
Application amount
T35
T85 T200 T380 T750
T85S T200S T380S T750S
Piston 5 2g x 2 pcs 2g x 2 pcs 3g x 2 pcs 5g x 2 pcs 7.5g x 2 pcs
Yoke U groove 3 1g x 2 pcs 2g x 2 pcs 2g x 2 pcs 3g x 2 pcs 5g x 2 pcs
1 Double 5g
Double 10g Double 15g Double 20g Double 30g
Single 15g Single 20g Single 35g Single 45g
13,14 1g x 2 pcs 2g x 2 pcs 2g x 2 pcs 3g x 2 pcs 3g x 2 pcs
Fig. 32 shows the figure when this product is seen from the top
5-3 Assembly procedure
Assembly procedure
(1) Prior to the reassembly, each element should be
thoroughly cleaned and checked to make sure
that no dirt or damage is noticed. [Fig. 27]
(2) Replace all the consumables (O-rings, packings,
bearings, etc.) even if they appear intact.
(3) The sliding parts of the O-rings, packings, bear-
ings, etc. should be applied with grease.
(4) For assembly of single-acting type cylinders, refer
to 5-4 Single-acting type cylinder side cover
assembly procedure.
(5) Remove liquid gasket adhered to the base plate
and the case completely.
(1) Replace all the O-rings mounted on the shaft ② .
[Fig. 28]
When replacing the O-rings, apply grease (lithium
soap-base, consistency No.2) to two O-ring
grooves on the shaft ② . Please use the applica-
tion amount shown in [Table 10].
(2) Apply grease (lithium soap-base, consistency
No.2) to O-rings ㉕ and ㉖ , the shaft ② and the
inner and outer surfaces of the bearings. Please
use the application amount shown in [Table 10].
[Fig. 29]
(3) Insert the shaft ② in the direction of the arrow
while holding the yoke ③ and the bearings in the
case. Rotate and insert the shaft slowly. [Fig. 30]
There is a mounting direction for the yoke ③ .
Assemble the unit so that the face stamped with
"UP" mark of the yoke faces to the upper side of
the cylinder.
Note) If "F" mark is stamped on the yoke instead
of "UP" mark, assemble the unit so that the
face stamped with "F" mark faces to the
bottom of the cylinder.
There is a mounting direction for the yoke ③ .
Assembly of the unit the yoke whose direction is
wrong will cause defective operation due to insuffi-
cient output torque.
Do not hit the shaft when inserting the shaft.
Otherwise the case may be damaged.
If the shaft is not inserted smoothly, any part may
interfere.
If the shaft is inserted forcibly, the O-rings may be
broken, resulting in air leakage or defective operation.
[Fig. 27]
[Fig. 28]
[Fig. 29]
[Fig. 30]
O-ring ㉕
Grease application area
O-ring ㉖
Bearing ⑬
Yoke ③
Bearing ⑬
[except T35]
Case ①
Shaft ②
Bearing ⑬
Bearing ⑯
Yoke ③
Bearing ⑭
[T35]
Application amount
T35
T85 T200 T380 T750
T85S T200S T380S T750S
Table 10 Grease application amount (Bearing, Shaft)
O-rings should fit in the grooves.
Grease should be applied to the O-rings.
Application
area
Shaft
O-ring groove
Bearing inner
surface
Bearing inner
surface
Shaft
Bearing inner
surface
Part
number
2 0.5g 1g 1g 2g 2g
13,14,16 Total 2g ― ― ― ―
13 ― Total 2g Total 2g Total 3g Total 5g
2 3g 4g 5g 7.5g 15g
15 0.5g 0.5g 0.5g 1g 1g
Application
area
Case inner
surface
Bearing outer
surface
Part
number
CAUTION
CAUTION
CAUTION
CAUTION