PS S5.7 5450
000 OE35
Version no T-code
F-code Section C-code
1A Speed Contactor
194
Service Manual 1997-10-29
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. Disassembly
1. Disconnect power cables from contactors. Remove
bolts with washers, and lockwashers from contacts.
Move power cables out of the way.
2. Disconnect wiring from contactor coil terminals.
3. Remove mounting bolts securing contactor assembly to
the control panel base plate that is attached to the truck.
Remove assembly from truck.
4. Remove clamps (15), screws (17), and lockwashers
(16).
5. Remove and discard contacts (7).
6. Remove and inspect bus base (6) for cracks and
damage. An insulator found to be cracked or broken
should be replaced with a new one.
7. Remove support sub-assembly (armature, contacts,
etc.). The return spring should come off with the
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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