YASKAWA Motoman GP35L - Disassembly and Reassembly of the U-Axis Motor

5 Disassembly and Reassembly of the Motor
5.3 Disassembly and Reassembly of the U-Axis Motor
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HW1484673
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5.3 Disassembly and Reassembly of the U-Axis Motor
• Refer to fig. 5-5(a) “Disassembly and Reassembly of the U-Axis
Motor” .
 Disassembly
1. Turn OFF the power supply of the YRC1000.
2. Remove the encoder connector of the U-axis motor (fixing bolt:
pan-head screw M2), and then disconnect the encoder cable.
3. Turn the connector on the cable side of the power connector for the U-
axis motor , and then disconnect the power cable. If the connector
does not turn, remove the connector by holding the connector on the
cable side with a pair of plastic pliers etc.
4. Before removing the U-axis motor , support the U-arm with the
chain block, etc. to prevent the L-arm from rotating.
5. Unscrew the hexagon socket head cap screws , and then remove
the U-axis motor from the motor base . Be careful not to damage
the oil seal in the motor base at this time.
6. Unscrew the hexagon socket head cap screw , and then remove the
gear , key , collar , and washer .
 Reassembly
1. Apply ThreeBond 1206C to the contact surface of the U-axis motor
and the collar , and then mount the collar and key on the U-
axis motor . (The key is provided with the U-axis motor.) For the
place to apply sealing bond, refer to fig. 5-5(b) “Surface to Apply
Sealing Bond on the U-Axis Motor” .
2. Apply ThreeBond 1206C to the contact surface of the collar and
gear , and then mount the gear . For the place to apply sealing
bond, refer to fig. 5-5(b).
3. Pass the hexagon socket head cap screw through the washer ,
and then apply LOCTITE 243 to the thread part of the screw. Tighten
the screw with the tightening torque shown in table 5-4 “U-Axis Motor
Parts Checklist” .
4. Apply MP-1 grease to the lip part of the oil seal .
5. Apply ThreeBond 1206C to the contact surface of the U-axis motor
and the motor base , and then mount the U-axis motor on motor
base . Mount the motor so that the cable connector is positioned in
the rear. For the place to apply sealing bond, refer to fig. 5-5(b).
6. Pass the hexagon socket head cap screws through the conical
spring washers, and then apply ThreeBond 1206C to the thread part of
the screws. Tighten the hexagon socket head cap screws with the
tightening torque shown in table 5-4.
7. Connect the encoder cable to the U-axis motor , and then tighten
the connector fixing bolt (pan-head screw M2) with a tightening torque
of 0.2 N•m.
(The connector fixing bolt is provided with the connector.)
8. As shown in fig. 5-5(d) “Motor Power Cable” , insert the power
connector to the U-axis motor by aligning the key position, and then
turn the coupling nut on the cable side until it makes a clicking sound.
Confirm that the arrow marks on the connector on the motor side and
the connector on the wiring harness side match.
9. Turn ON the power supply of the YRC1000.
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