16
(6) Front casing (No.3-1)
If there is abrasion or corrosion inside, replace it.
(7) O-ring (No.2-4, 3-3, 3-5, 4-4, 6-3)
If there is harden, less elastic or crack, replace it.
4. Consumable parts change
(1) Front casing set (2) Rear casing set (including O-ring) (3) Impeller set
Disassembly / Assembly
YD-20Y6GV1 / 20A6GV1
The magnet force which is used in a pump is powerful, be careful of it during disassembly or
assembly. As well make sure to close the suction and discharge valves during them.
1. Disassembly
(1) Drain the liquid remaining inside the pump and wash the interior thoroughly.
(2) Remove 8 hex socket head cap screws (M6) and remove the front casing. (Do not disassemble
the front casing set to maintain the proper function.)
(3) Pull the impeller out to forward. Do not scratch them with care.
(4) When putting sharps such as scraper between the rear casing and rear motor bracket and lifting
the rear casing, the rear casing is pull out to forward.
2. Assembly
Assembly is in the reverse order of disassembly. Clean the sliding parts and O-rings thoroughly with
no entering dust or scratch. As well tighten the bolts evenly.
(1) Install the rear casing with the shaft and the rear thrust ring to the motor with bracket with the
outer magnet.
(2) Install the O-ring to the rear casing assemble with the front casing.
(3) Tighten 8 hex. socket head cap screws (M6) by required torque.
Required torque: 2.5N
・
m
(4) Pipe and prime the liquid (0.6L) fully from the priming cock.
Note:
When disassembly or assembly, it is recommended to replace O-ring. After assembly, remove
the motor fan cover and turn the fan by a hand to check it rotates smoothly.
<Rotation direction check of the motor>
Check that the direction is clockwise as viewed from the motor fan cover at the start. If it is in reverse,
switch two of the three phases in the three-phase power supply.
Exploded view
YD-20Y6GV1 / 20A6GV1
