17
Maintenance / Consumable parts
YD-250* / 400* / 500*GV(F)* series
1. Daily check
(1) Check that there are no vibrations, or any abnormal noises and it works smoothly.
(2) Compare the current value during operation with the rated current value and check that the
operating load is normal. Also, the discharge pressure, capacity and current value is on the level
than ever before.
(3) Check the liquid level in the suction tank. (The empty tank during operation = the pump
damaged)
2. Periodical check
(1) Periodically overhaul is recommended for a smooth operation.
(2) When replace or carrying pumps for repair, drain and wash the pump thoroughly.
3. Consumable parts check
Periodically check the following consumable parts and replace them if necessary.
(1) Mouth ring (P11 No. 17)
Check the wear volume as viewed from the front.
Replace it if the track is bald.
(2) Bearing (No. 19)
Check no crack / damage and the rattle with the shaft increases.
(3) Rear thrust ring (No. 21)
If it is worn to contact with the rear casing, replace it.
(4) Shaft (No. 20)
Check that there is no crack or damage.
(5) Liner ring (No. 7)
Check no crack or damage on the alumina ceramic.
(6) Impeller (No. 18)
If there is abrasion or corrosion on around the impeller, replace it.
(7) Rear casing (No. 22)
Check no abrasion or corrosion inside or outside.
(8) Casing (No. 1, 2)
If there is abrasion or corrosion, replace it.
(9) O-ring, Pacing (No. 12, 13, 28)
If there is harden, less elastic or crack, replace it.
