WARNING
• For your own safety, be sure to read these procedures carefully before performing
maintenance on this product. After reading this document, be sure to keep it handy for
future reference.
This maintenance manual covers what you should know about maintenance of the Yamada NDP-P50
series Diaphragm Pumps.
This edition is based on the standards for the July 2020 production run. Remember, the specifications are
always subject to change; therefore, some of the information in this edition may not apply to new
specifications.
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Warnings and Cautions
For safe use of this product, be sure to note the following: In this document, warnings and cautions are
indicated by symbols. These symbols are for those who will operate this product and for those who will be
nearby, for safe operation and for prevention of personal injury and property damage. The following
warning and caution symbols have the meanings described below. Be sure to remember their meanings.
If you ignore the warning described and operate the product in
an improper manner, there is danger of serious bodily injury or
death.
If you ignore the caution described and operate the product in an
improper manner. There is danger of personal injury or property
damage.
Furthermore, to indicate the type of danger and damage, the following symbols are also used along with
those mentioned above:
This symbol indicates a DON'T, and will be accompanied by an explanation on something
you must not do.
This symbol indicates a DO, and will be accompanied by instructions on something you
must do in a certain situation.
WARNING
• Before starting maintenance work, cut off the feed air and clean the pump. If air pressure or
residue remain in the pump, there is danger of explosion, or possible poisoning resulting
in serious injury or death if chemicals adhere to the skin or are accidentally swallowed.
(For details on cleaning the pump, refer to Chapter 6 of the Operation Manual.)
• When replacing parts, be sure to use the recommended genuine parts or Equivalents. Use of
other parts may cause a malfunction of the product.
(Refer to Parts list the separate sheets.)
CAUTION
• When it is instructed that special tools must be used, be sure to use the specified tools.
Otherwise, the pump may be damaged.
• Refer to “10.1 Specifications” in the Operation Manual. Also, remember that the pump is
heavy, and extreme care must be taken when lifting it.
• Stainless steel bolts and nuts are used to fix the casing. Use anti-seize lubricant when
screwing these.
WARNING
:
CAUTION
: