ISSPRO R6853R User Manual
Page 2
Form No. IS904 (6/26/08 RevB) Page 2 of 2
EV-1 Mechanical Temperature Gauge
MECHANICAL TEMPERATURE GAUGES have sealed, vapor pressurized capillary tubing. One end of the tubing
is soldered to the gauge mechanism, while the other end is fitted with an external pipe thread adapter for connection
to a temperature reading source.
Route tubing from back of gauge, through firewall, to pipe plug fitting where a temperature reading may be
obtained. Use suitable protection to prevent abrasive damage to tubing, and avoid excessive rough handling,
twisting, or pulling of tubing, as a kink or rupture will cause leaks and render gauge useless.
Remove pipe plug fitting and adapter nut from temperature gauge fitting. Thread adapter nut into boss. Insert bulb
end of tubing into adapter and secure by threading small nut on tubing into adapter. Be certain that bulb is
sufficiently immersed in coolant or lubricant.
Fasten tubing securely along its route to avoid interference with other engine equipment and to avoid vibration,
which could cause cracking. If tubing is too long, it may be carefully looped and taped to shorten; do not cut.