User's Manual

MTU Instruction
for Sprague Model 175 Gas Meters
CAUTION!
Be careful not to cross-thread
the magnet wheel when
installing it on the meter drive
shaft. Cross-threading can
cause misalignment of the
magnet wheel which in turn
can cause binding or erratic
performance.
Step 4 – Start the two 10-24 x 3/8”
machine screws into the index mounting
holes. Thread each screw in
approximately one full turn.
Step 5 – Attach the sensor to the meter
by positioning the keyhole-shaped slots of
the sensor bracket over the index
mounting screws as shown here. Route
the sensor wire through the slot at the
bottom right-hand corner of the sensor
bracket and back to the left under the
magnet wheel so that it does not interfere
with the magnet wheel or the index gears.
Step 6 – Replace the index by hooking
the two tabs on the index behind the
heads of the index mounting screws.
Insure that the drive foot on the index will
be driven by the pin on the magnet wheel
as it rotates. Several styles of indexes
and index drive mechanisms may be
encountered. Use the photos below as a
guide. Note that on indexes with a slotted
drive foot, it is intended that the pin on the
magnet wheel engages the slot on the
drive foot.
Brass Index with Slotted Drive Foot
Brass Index with Offset Drive Foot
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