Simpson 1000 - Page 41

MAINTENANCE
tension against the wheel.
CENTER SHAFT CLIPS
Each roller is assembled on a center shaft. The tube sets
into recesses in the inside wheel faces. The wheels are
fastened on the shaft with a speed-nut clip at each end of
the assembly. If the clips slip out on the center shaft, the
entire assembly will become loose, and there will be added
bearing pressure in the bracket mounting. If this should
happen, tighten the assembly by forcing each clip in a-
gainst the outer wheel face.
SECTION VI
SPECIAL APPLICATIONS
TESTING PILOT LAMPS AND
CHRISTMAS TREE LAMPS
The center of the large 7-pin socket has a receptacle into
which you can insert any lamp which has a miniature base.
Whether the lamp has a screw base or a bayonet base, it
has a center contact on the end of the base, and the other
contact is the shell around the side of the base.
When the lamp is placed in the receptacle, the center con-
tact will connect to the center of the receptacle, and the
shell of the lamp base will contact the metal wall around
the receptacle. The center of the receptacle is connected
to the #1 terminal of the tube socket.
Set toggle switch ''A'' at 0 to connect ground potential of
the tube tester. The metal wall of the receptacle is con-
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