YAMADA DP-20F/P, Руководство по обслуживанию

Страница: 8 / 16

5
Fig.4.7
Fig.4.8
▪ Hold the diaphragm and turn the bushing in the direction of
the arrow to separate it from the diaphragm. [Fig.4.6]
4.2 Inspection
▪ Diaphragm
Replace the diaphragm if it is worn out or damaged.
Always replace both diaphragms at the same time.
Guideline of diaphragm life
6 million cycles
▪ Center rod [Fig.4.7]
Measure the diameter, and if it is not within the
permissible range, replace the center rod.
Permissible range of center rod diameter
DP-20F/P Ø 17.92 - Ø 17.98 mm
DP-25F/P, DP-25F/C Ø 23.92 - Ø 23.98 mm
DP-38F/P, DP-38F/C Ø 29.87 - Ø 29.95 mm
▪ Body [Fig.4.8]
Measure the inside diameter, and if it is not within the
permissible range, replace the body.
▪ Packing, Wiper
Replace the packing and wiper if they are worn out or
damaged.
▪ Bushing
Replace the bushing if the thread is damaged.
4.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
▪ Soak the wipers in lubricant oil and fit them in the pump body.
▪ Apply grease to the packings and fit them in the pump body.
(Refer to P.11 instruction for applying lubrication)
▪ Attach the bushings to the diaphragm securely.
▪ Turn the diaphragm assembly with hands until it stops to
complete the body assembly.
Tightening torque for horizontal tie rods
DP-20F/P 9 N•m
DP-25F/P, DP-25F/C 10 N•m
DP-38F/P, DP-38F/C 15 N•m
Permissible range of body dimension
DP-20F/P Ø 18.03 - Ø 18.11 mm
DP-25F/P, DP-25F/C Ø 24.03 - Ø 24.11 mm
DP-38F/P, DP-38F/C Ø 30.03 - Ø 30.10 mm
Fig.4.6
Fig.4.9