YASKAWA MOTOMAN-PH130F - Page 106

10 Disassembly and Reassembly of Balancer Unit
10.2 Disassembly and Reassembly of Balancer Unit
10-4
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11. Tighten the hexagon socket head cap screws with the tightening
torque shown in table 10-1 “Balancer Unit Parts Checklist” .
12. Apply sealing bond ThreeBond 1206C to the contact surface of the
shaft assembly (support part 1) and the balancer unit assembly .
13. Mount the shaft assembly (support part 1) on the balancer unit
assembly .
14. Apply sealing bond ThreeBond 1206C on the thread parts of the
hexagon socket head cap screws , and tighten them with the
tightening torque shown in table 10-1.
15. Insert the outer ring of the tapered roller bearing into the S-head.
16. Only when replacing the balancer unit: mount the O-ring on the B-
cover .
17. Only when replacing the balancer unit: mount the B-cover on the S-
head. (Be careful that the O-ring does not get caught between the
parts.)
18. Only when replacing the balancer unit: tighten the hexagon socket
head cap screws with the light tightening torque shown in
table 10-1. Proceed to Step 21.
19. Mount the B-cover and shim on the S-head. (Be careful that the
O-ring does not get caught between the parts.)
20. Tighten the hexagon socket head cap screws with the tightening
torque shown in table 10-1.
21. Push the flange inside the balancer evenly with the spring fixing bolts
(or hexagon socket head cap screws ) to free the rod in the balancer
unit assembly .
22. Only when replacing the balancer unit: if the thread length with the
hexagon socket head cap screws is short, use 3 fully threaded
spring fixing bolts M8 or M10 instead.
23. Align the center of the hole in the L-arm and the center of the hole in
the balancer unit assembly . Pass the shaft assembly (knuckle part)
through the L-arm and balancer unit assembly .
24. Tighten the hexagon socket head cap screws with the tightening
torque shown in table 10-1.
25. Unscrew the spring fixing bolts (or hexagon socket head cap screws
), and replace them with the hexagon socket head cap screws .
26. Tighten the hexagon socket head cap screws with the tightening
torque shown in table 10-1.
DANGER
• Before unscrewing the spring fixing bolts, confirm that the L-axis
motor brake is appropriately functioning.
Failure to observe this instruction may rotate the L-axis and cause a
hazardous condition.
13
3
1
3
1
11
12
10
8
8
7
8
9
7
20
1
20
1
2
1
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20
5
5
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