MAINTENANCE
Page 43
C h e c k f o r a n y s i g n s o f r u s t e d o r
corroded
parts.
Check for free movement of all moving
parts and mechanisms.
Lubricate if
necessary with Toshiba
grease.
Grease is conductive.
Do not apply grease to
electrical insulation.
ELECTRICAL JOINTS
Examine all visible terminals and joints
for signs of overheating (Fig. 55). An
overheated
connection
will
appear
discolored.
Be suspicious of any
conducting joint which has a darker
color than other similar joints.
C h e c k a l l b o l t e d c o n n e c t i o n s f o r
tightness.
T h e p r o p e r t o r q u e i s
dependent on the size of the hardware
and the materials used. As a general
guide, use the following table:
Hardware
Size
4 - 6
6-l 8
IO-15
6
20-30
4 0 - 5 0
The above values apply to metal-to-metal
joints, e.g.,
copper-to-copper, etc.
When
torquing a bolt threaded into an insert molded
into a plastic part, use approximately
the
torque shown.
WITHDRAWABLE CONTACTOR CARRIAGE
C h e c k t h e c o n d i t i o n o f t h e s t a b
t e r m i n a l s o n
the
w i t h d r a w a b l e
contactor carriage for any signs of
damage or discoloration (Fig. 56). If
there is any excessive build-up of dirt or
other foreign material, wipe clean and
relubricate with a light coat of Toshiba
grease, making sure that no grease
Fig. 55 Check Electrical Joints
Fig. 56 Checking Stabs On Withdrawable
Contactor Carriage
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