Kohler KGP, Manual

Page: 80 / 126

TP-6461 1/08 80 Section 5 Component Replacement, Model KGS/KGP
8. Slide out the pivot pin.
9. Remove the bus stud bolt, compression washer,
and clamp bracket.
10. Remove the movable contact assembly.
11. If replacing the stationary contact, proceed to
step 12. If not replacing the stationary contact,
proceed to the replacement procedure.
12. Remove the hex head cap screws and the
compression washers (2) that secure the lug
terminal.
13. Remove the machine screws (2) that secure the
other end of the stationary contact to the transfer
switch panel.
14. Remove the stationary contact.
Replacing Contact Assemblies,
800--1200 Amp Models
Refer to Figure 5-1, Figure 5-2, Figure 5-4, Figure 5-3,
and Figure 5-5 for the following procedure:
1. If replacing the stationary contact, position the new
stationary contact on the transfer switch panel.
2. Secure the new stationary contact and the lug
assembly using hex head cap screws,
compression washers, and machine screws (2).
3. Torque the cap screws to 31.2 Nm (23 ft. lb.) and
the machine screws to 13.6 Nm (10 ft. lb.).
4. Using the new hardware supplied with the contact
assemblies kit secure the new movable contact
assembly with the bus stud bolt, compression
washer, and clamp bracket.
5. Torque the bus stud bolt to 31.2 Nm (23 ft. lb.)
6. Install the pivot pin and secure with the retaining
ring.
7. Connect the actuator arms to the contact posts and
secure with the two retaining rings. See
Figure 5-2.
8. Adjust the contacts (steps 9, 10, 12, and 13) in the
sequence shown in Figure 5-3. For 3-pole switch
all contacts should close at approximately the
same time. For 4 pole switches poles A, B, and C
should close at approximately at the same time.
The neutral pole should close approximately
12.7 mm (1/2 in.) before the other three poles.
1. C Pole
2. B Pole 3. A Pole
4. Neutral pole 5. Operator
3 Pole
4 Pole
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1 2 3
4
5
1 2 3
Figure 5-3 Contact Adjustment Order
9. Manually close the contacts until the arcing
contacts touch. See Figure 5-4. The main
contacts should have a 1.59 mm (1/16 in.)
minimum gap. If they do not, reject the contact
assembly. Measure and record the prespring gap.
1. Prespring gap
2. Main contact gap
3. Arcing contact
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2
3
1
Figure 5-4 Contact Adjustment Part 1