46230809.pdf - 第38页

Page 38 TECHNICAL P UBLICATIONS T46230809 Rev . C Dual Rotary Positioning Assembly - BHS This Document Supports Assembly 46230809 The bearing assembly tool may be used without the pilot to remove the bearing from the C-f…

Page 37

TECHNICAL PUBLICATIONS

Dual Rotary Positioning Assembly - BHS T46230809 Rev.C

This Document Supports Assembly 46230809

Bearing Removal Procedure

1. Power down the machine as detailed in the Operation Manual and open

the rear cover of the machine.

2. Loosen the screws that secure the rear stiffener plate from the C-frame,

then remove the rear stiffener plate.

3. Loosen the two set screws in the flex coupling that secures the flex

coupling to the lead screw shaft

4. Remove the four screws, lockwashers and washers that secure the en-

coder and mounting plate assembly to the C-frame, then remove the

encoder and mounting plate assembly.

5. Loosen the four screws that secure the motor and mounting plate as-

sembly to the C-frame to relieve the tension on the drive belt. Slide the

drive belt off the pulley.

6. While holding the pulley to prevent it from turning, loosen the lock nut

and remove the lock nut and washer.

7. Loosen the set screws that secure the pulley to the lead screw shaft,

then remove the pulley, key and spacer.

8. Remove the screws that secure the dust bellow and retainer plate to the

bearing retainer and move the dust bellow out of the way.

9. Loosen the set screw that secures the bearing plug in the bearing plate,

then using the spanner tool, remove the bearing plug and plug washer.

10. Remove the two flat head screws that secure the bearing retainer and

bearing washer to the C-frame, then remove the bearing retainer and

bearing washer.

11. Remove the button head screw that secures the Y frame cover, then re-

move the Y frame cover.

12. Remove the three socket head screws that secure the bearing block at

the front of the lead screw, then remove the bearing block.

13. Move the positioning assembly toward the front of the machine until

the lead screw shaft is pulled out of the bearing.

If the lead screw turns while the positioning assembly is being moved

forward, the shaft may be stuck and require light impact to loosen it and

allow it to be pulled from the bearing.

14. Remove the duplex bearing from the C-frame, being sure not to dam-

age the bore in the C-frame. The bearing assembly tool may be used to

remove the duplex bearing.

Page 38

TECHNICAL P UBLICATIONS

T46230809 Rev. C Dual Rotary Positioning Assembly - BHS

This Document Supports Assembly 46230809

The bearing assembly tool may be used without the pilot to remove the

bearing from the C-frame. By engaging the tool, as shown below, turn

the nut on the bolt against the puller support until the bearing is

removed from the C-frame.

C-frame

Puller

Support

Duplex

Bearing

Outer Race

Support

Bolt

Nut

Washer

Bearing Installation Procedure

1. Slide the outer race support and duplex bearing onto the bolt then

thread the pilot against the duplex bearing as shown below. Ensure

that the markings (><) on the duplex bearing are aligned and facing

each other.

2. Place the pilot into the bore of the C-frame with the threaded end of the

bolt pointing towards the rear of the machine.

C-frame

Duplex

Bearing

Pilot

Outer Race

Support

Bolt

Nut

Puller

Support

REAR OF

MACHINE

Washer

Page 39

TECHNICAL PUBLICATIONS

Dual Rotary Positioning Assembly - BHS T46230809 Rev.C

This Document Supports Assembly 46230809

3. Place the puller support over the threaded end of the bolt then install

the nut and washer onto the bolt until the washer is against the outer

surface of the puller support.

4. Hold the bolt head from turning and turn the nut until the pilot bottoms

out on the inside of the puller support.

5. While holding the bolt head from turning, remove the nut from the bolt

then remove the remaining parts of the board assembly tool.

6. Using the flat head screws, install the bearing retainer and bearing

washer to the inside surface of the C-frame.

7. Using the socket head screws, install the bearing plate to the outer sur-

face of the C-frame.

8. Install the plug washer in the threaded hole of the bearing plate so the

plug washer is against the bearing.

9. Install the bearing plug into the bearing plate until it lightly engages the

plug washer.

10. Carefully move the positioning assembly towards the rear of the ma-

chine so the lead screw shaft extends through the bearing.

Use extreme caution when extending the lead screw shaft through the

bearing so the bearing is not impacted by the lead screw. Impacts on

the bearing may cause unnoticable damage which will result in

premature bearing failure and improper machine operation.

Dust Bellow

C-frame

Lead Screw

Shaft

Bearing

Retainer

Bearing

Washer

Bearing

Plate

Bearing

Plug

Washer

Duplex

Bearing

11. Using the spanner tool engaged in the bearing plug, torque the bearing

plug to 65 in-lbs.

12. Tighten the set screw in the bearing plate until it engages the bearing

plug.