9.2 Contact Travel and Over-Travel Adjustment (See Figure 7)
With the breaker in the open position:
1. Loosen Locknut (F) on Bolt Stem (E).
2. Remove Pin (B) while applying pressure from the back of the Contact Block. Allow
Contact Block to move slowly to closed position. Caution: finger pinch point.
3. Loosen Pullrod Locknut (D).
4. Turn Pullrod until center of hole for Pin (B) is 1.687” from Contact Block (C). (This step
sets a reference point for the Bell Cranks.)
5. Spin Bolt Stem (E) until Pin (B) can be inserted and then remove Pin (B). (This step
establishes a reference from VI Contact to the bell cranks.)
6. Spin Bolt Stem (E) 6-6.5 full turns (6.5 turns is preferred final travel, but 6 acceptable
prior to contact conditioning) CW. (This step sets the Contact Travel.)
7. Pull from back of Contact Block (C) until Pin (B) can be inserted.
8. Install new X-washer and tighten all hardware. Do not reuse washers.
9. Measure Travel and Over-Travel by opening and closing breaker. Confirm breaker is
within limits. Minor adjustments can be made by turning pushrod (A).
10. Over-Travel Limits (Gap produced at top of Pullrod while closed) are MIN 0.17”, MAX
0.260”.
11. Travel Limits (Difference in measurements between Contact Block in open and closed
position) are 10.5 mm - 12.5 mm (0.413”-0.492”).
Operate breaker a minimum of 200 times to season new contacts, readjust breaker (Step 9).
Page 10
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