Maintenance 11
4.1 Disassembly of Pulse meter (Refer Exploded View) If required to gain access to the meter terminals and
pulse output board, undo the 4 cap screws (10), remove the terminal cover (9) carefully to avoid putting strain on
the terminal connections. The pulse output board (6) can now be accessed and removed if necessary (screws 7).
If required to gain access to the oval geared rotors undo the 8 body screws (5), carefully pry the meter body apart
avoiding misplacing or damaging the O-ring (3) and rotors (2).
4.2 Dissassembly of meters fitted with an Instrument If the meter is fitted with an integral instrument the
instrument display assembly must be removed if required to gain access to the instrument terminal connections,
instrument battery or pulse output board. This is achieved by undoing the bezel screws and separating the display
assembly from its base. Do not stress or damage the wires that connect the display assembly to the meter output.
Take care not to misplace or damage O-ring(s).The pulse output board can now be accessed. To remove the pulse
output board, first undo the screws that fix the instrument base to the flowmeter.
12 Maintenance
(refer to exploded view)
Item Description
OM025 OM040 OM050
1 B ody assembly with rotor shafts
Part No.
aluminum 1401096 1401094 1401092
stainless steel 1401097 1401093
2 Rotor assembly set
aluminum rotors + bearings
1424071 1424111 1424099
stainless steel rotors + bearings 1424092 1424125 1524011
3
Body O-ring
(size BS153) (size BS245) (size BS253)
teflon 13031533 13032453 13032533
4 Meter cap
aluminum with M20 conduit entry 1302047 1302160 1302088
aluminum with 1/2" NPT conduit entry 1302164 1302161 1302167
stainless with M20 conduit entry 1302165 1302166 1306025
stainless with 1/2" NPT conduit entry 1302059 1302162 1306029
5 Cap screw
(M6 x 20) (M10 x 25) (M10 x 25)
stainless & aluminum bodies 130816103 130810104 130810104
6
Pulse output board
standard pulse board 1412033 1412055 1412034
quadrature pulse board 1412039 1412040 1412040
7 Output board screw
M3 x 4 slot head 130803101
8
Terminal cover O-ring
suit std. stainless cover
10 Terminal cover screw
M5 x 16 130805101
11 Flange portion O-ring
(size BS123) (size BS136) (size BS140)
viton 13031231 13031361 13031401
teflon 13031233 13031363 13031403
12 Flange portion screw
(M8 x 25) (M10 x 30) (M10 x 30)
socket head 130808103 130810104 130810105
13 Flange portion
refer diagram opposite
Recommended spare parts :
Item 2 rotor assembly set
Item 3 body O-ring
Item 6 pulse output board
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