Installation Instructions

MTU Instruction
for Sprague Model 175 Gas Meters
Tools Required
To mount the MTU to these meters, you
will need the following tools and
equipment:
• Small, diagonal plastic cutting
pliers
• 7/16″ boxwrench
• Safety goggles
• #1 and #2 Phillips screwdrivers
• #1 and #2 Slotted screwdrivers
See Publication 471-2000, General
Installation and Wiring Guidelines for a
complete list of recommended tools and
supplies for MTU Installation.
Installation Procedure
Installing the Sensor Assembly
Before installing the Sensor Assembly,
anti-tamper, safety, and security
hardware must be removed from the clear
register cover.
Step 1 – Remove the clear index cover
from the meter by removing the screw
that holds it. The clear index cover and
the index cover screw will be reused.
Clean and inspect these items and set
them aside until needed. Replace if
damaged.
Step 2 – Remove the index by removing
the two screws that hold it to the meter.
Set the index aside until later. The
screws that held the index to the meter
can be discarded.
Step 3 – Remove the drive foot from the
meter drive shaft by unthreading it
counterclockwise. The drive foot will not
be reused and can be discarded. Then,
thread the magnet wheel clockwise onto
the shaft. Tighten the magnet wheel until
snug to the end of the threads on the
drive shaft.
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