I.B. 32-255-1G
Page 42
Effective 12/02
relubricated. The locations shown in Figure 6-1 should
be lubricated with a drop of mineral oil.
After lubrication, operate the circuit breaker several
times manually and electrically.
Roller bearings are used on the pole shaft, the cam
shaft, the main link and the motor eccentric. These
bearings are packed at the factory with a top grade slow
oxidizing grease which normally should be effective for
many years. They should not be disturbed unless there
is definite evidence of sluggishness, dirt or parts are dis-
mantled for some reason.
If it becomes necessary to disassemble the mechanism,
the bearings and related parts should be thoroughly
cleaned. Remove old grease in a good grease solvent.
Do not use carbon tetrachloride. They should then be
washed in light machine oil until the cleaner is removed.
After the oil has been drawn off, the bearings should
be packed with Cutler-Hammer Grease 53701QB or
equivalent.
Breaker Approximate Upper Lower Marker
Line Mechanism Mounting Mounting Placement
Cabinet Hole Hole Hole
Width (inch)
DHP-VR
20 A1 B2 C2
29 A1 B1 C5
VCPW-ND 20/21 A1 B2 C2
VCP-W
29 A1 B2 C5
33 A2 B2 C6
VCP-WG, 29 A1 B2 C5
VCP-WGR
18 A1 B2 C1
VCP-WR 20 A1 B2 C2
29 A1 B2 C5
W-VAC,
18 A1 B2 C1
W-VACR
25 A1 B1 C4
33 A2 B2 C6
Step 13 -
Evaluate the CloSure
TM”
performance by com-
paring the test tape with the illustrations in Figure 6-18.
If the marking is similar to 6-18A, measure the over
travel “x”: If “x” is greater than or equal to 0.6 inches,
the circuit breaker performance is satisfactory. If “x” is
less than 0.6 inches or if the marking is similar to 6-18B
or 6-18C, immediately contact the Product Integrity
Center for Technical Support at (412) 787-6518.
Step 14 -
Remove the CloSure
TM
Tool. Reassemble the
front cover onto the circuit breaker. Return the circuit
breaker to it’s original configuration and setup.
6-10 LUBRICATION
All parts that require lubrication have been lubricated
during the assembly with molybdenum disulphide
grease (Cutler-Hammer Material No. 53701QB). Over a
period of time, this lubricant may be pushed out of the
way or degrade. Proper lubrication at regular intervals is
essential for maintaining the reliable performance of the
mechanism. Once a year or every 500 operations
whichever comes first, the circuit breaker should be
Figure 6-20 Typical Circuit Breaker Front View with
CloSure
TM
Tool Attached (approximate mechanism
chassis width)
Table 6.4 Closure
TM
Tool Mounting/Testing Locations by
Circuit Breaker Type
Width
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