0
S-76-9-E
First Rotor
6.2 Meter Body Assembly
Precautions Before Assembly:
Wash clean oval rotors, inner walls of rotor shaft bearings, measuring chamber and inlet/
outlet ports thoroughly to remove dirt, sand and other contaminants completely.
() Rotor installation
Installation is correct with the signal generating
magnet embedded side facing the front cover.
The first rotor (match mark “
●
”)
installs
on
the
upper shaft when the flow direction is from
right to left.
The second rotor (match mark “
● ●
”)
installs
on the lower shaft. Install the rotors carefully
with match marks as shown in the inset.
NOTES
. (
※
): Match marks are stamped only on product
code “LSF
□□
C
□−□□
”(metal rotors).
. Match marks do not appear on rotors of material
K (special resin) or P (PPS resin, PEEK resin).
Verify proper gear engagement at step () below.
Second Rotor
“IN”
Metal Stamped
Flow Direction
Match Marks (
※
)
Minor Axis
Major Axis
(2) Confirming the rotor engagement
Hand rotate the rotors at least one complete revolution to see that they are correctly engaged.
(3) Front cover installation
Firstly, install the O-ring in place. If the O-ring is damaged or swollen by the metered fluid, it may
not seat properly in the front cover groove. If this is the case, replace it with a new one.
Install four pan head screws and tighten them uniformly until the front cover is firmly secured to
the meter body.
(4) Checking smooth rotation
Check smooth rotation of the rotors and proper output pulse counting with the connected
receiving instrument by allowing air or water into the meter.
CAUTION
Rotation check should be conducted within a range of slow rotor rotation.
Allowing the rotors to spin too fast will lead to burn or other damage to the components.
