YAMADA Global Series, Maintenance Manual

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8
■ P_ Type
▪ Apply grease to the center rod, and insert it into the main
body.
▪ PT type (PTFE Diaphragm model): Put the backup
diaphragm before PTFE diaphragm, and O ring after PTFE
diaphragm. (cf. Fig.5.11)
▪ Keep the convex side to the outside for diaphragm and
backup diaphragm.
▪ Tighten the center disk.
▪ Assemble the out chamber. Bolts should not be fully
tightened at this point.
▪ Place the pump on flat surface, stand the pump upright and
tighten all the bolts fully.
Tightening torque for center rod and out chamber
Center rod Out chamber
PS 177 in-lbf {20 N-m} 105 in-lbf {12 N-m}
PT 177 in-lbf {20 N-m} 89 in-lbf {10 N
･
m}
＜
NOTE
＞
▪ Make sure there is no dust on the seal surface in order to
prevent seal damaged.
▪ Replace the PTFE O ring by new one.
▪ Tighten the bolts that balance should be equal from both side
on diagonal line with even torque.
6. Guide bush
6.1 Removal
■ A_, S_ Type
▪ Remove the diaphragm and center rod etc. (see [5.1
Removal]).
▪ Remove the guide bushing with Cap and disk remover
(Special tool: 771132) [Fig. 6.1]
■
P_ Type
▪ Remove the diaphragm and center rod etc. (see [5.1
Removal]).
▪ Remove the tapping screw fixing the guide bush stopper and
remove the guide bush A, guide bush B and O ring. [Fig.6.2]
Fig.6.1
Fig.6.2
Fig.5.11