TM 5-3895-383-24
Test Tools For Cooling System
Tools Needed
8T0470
Thermistor Thermometer Group
1
8T2700
Indicator Group
6V3121
Multitach Group
1
or
1U6602
Tachometer Group
1
9S8140
Cooling System Pressurizing Pump Group
1
8T0470 Thermistor Thermometer Group
8T0470 Thermistor Thermometer Group
The 8T0470 Thermistor Thermometer Group is used in the
diagnosis of overheating (engine hotter than normal or
overcooling engine coder than normal) problems. This group
can be used to check temperatures in several different parts of
the cooing system. The testing procedure is in Special
Instruction, SEHS8446.
8T2700 Blow-by/Air Flow Indicator Group
8T2700 Indicator Group
The 8T2700 Blow-by/Air Flow Indicator Group is used to check
the air flow through the radiator core. The test procedure is in
Special Instruction, SEHS8712.
6V3121 Multitach Group or 1U6602 Tachometer Group (Photo-
Tachometer)
The 6V3121 Multitach Group is used to check the fan speed.
The testing procedure is in Special Instruction, SEHS7807.
6V3121 Multitach Group
The 6V3121 Multitach Group can measure engine speed from
a magnetic pickup on the flywheel housing. It also has the
ability to measure engine speed from visual engine parts in
rotation.
Special Instruction, SEHS7807 is with the 6V3121 Multitach
Group and gives instructions for the test procedure.
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