PS
S5.7
5440
000
Version no
T-code
F-code
Section
C-code
Direction Contactor
188
Service Manual
1997-07-15
1. General Information
1. Check armature and movable contacts for freedom of
movement by depressing movable arm with a
screwdriver or small rod.
Check for any restrictions to movement and for return
of parts by action of spring.
2. Inspect contact tips. Look for any worn or eroded
surfaces. Look for evidence of tip welding. Inspect for
evidence of any contaminants on tips (paint, dirt, paper
or cloth material, etc.) which would impair operation.
Do not use sandpaper or file tips. Any damage must
be corrected by tip replacement.
Tips must be replaced before they wear through and
damage copper base.
2. Remove / replace contact tips
1. Disconnect power cables from contactors. Remove
bolts with washers, lockwashers and spacers from
contacts. Move power cables out of the way.
2. Disconnect connecting bus bars from contacts.
3. Disconnect wiring from contactor coil terminals.
4. Remove mounting bolts securing Forward and Reverse
Contactor Assembly to the control panel base plate that
is attached to the truck. Remove assembly from truck.
5. Disassemble the contactors. Loosen cover screws on
both contactors. There are four screws per cover.
Note location of contacts so the new ones may be
installed to the same location as the old ones.
6. Press downward on Cover (15) and completely back out
screws until they are free of the contactor base. Do not
remove cover yet.
NOTE! Before attempting to disassemble a
contactor to install a new contact tip set,
carefully observe location and orientation of
each part.
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