TM 5-3805-258-24-1
9 5 0 B O P E R A T O R ’ S S T A T I O N
E L E C T R I C A L T R O U B L E S H O O T I NG
Other Methods of Failure
1. Some problems may come only intermittently (come at intervals). These
can be hard to find. Make an identification of some condition that comes at
the same time as a failure of the kickouts to operate correctly, such as:
a. A failure with the machine in a right hand or left hand turn.
b. A failure only in cold or hot weather.
c. A failure that started after someone made repairs to the machine, etc.
Get all the information possible from the operator. Check for loose connec-
tion, including grounds, in intermittent problems.
2. Fuses that blow (fail) with much frequency probably are caused by a
grounded wire, between the fuse and electronic switch box. Find which
kickout switch box blows the fuse, then find the grounded wire with the aid
of the wiring schematic.
Troubleshooting Methods for Kickouts
1. Use the 8S4627 Circuit Tester and the 5P7277 Voltage Tester for testing
circuits. Do not use a VOM (volt-ohm-milliammeter).
2. Do not check the switch assemblies with a VOM, or by any other method
except those shown under “Bench Testing”. There are no other simple tests
to check the switches.
3. Do not use just the operators description of the problems. Operate the
bucket controls to better understand any problems. In relation to the bucket
positioner, make an identification of specific types of problems, for
example:
a. Never kicks out.
b. Kicks out but will not latch up.
c. Kicks out, latches up, but never unlatches.
4. If possible operate a different machine to see the characteristics of a system
that works correctly, before a repair of a bucket positioner.
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