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UMC-500/750/1000 Rotary Brake Bleed - AD0496

Service Home How To Procedures UMC-500/750/1000 Rotary Brake Bleed - AD0496
Recently Updated Last updated: 03/02/2021

UMC-500/750/1000 Rotary Brake Bleeding - Procedure


AD0496

UMC-500/750/1000 Rotary Brake Bleed - AD0496

- Jump to Cause - Back to Top

10.1 UMC ROTARY BRAKE BLEED - PROCEDURE

Introduction

Use this procedure to bleed the rotary brakes on Reboot UMC machines.  For a UMC750 Non-Reboot machine refer to AD0309 UMC-750 B and C Axis Rotary Brakes - T-0062C Bleed - Instructions.   

UMC-750:  To identify which iteration of these machine models you are dealing with, refer to UMC-750 Machine Version - Identification.

This document applies to the following service kit:

  • 93-3243 UMC ROTARY BRAKE BLEED SERVICE KIT

 

Preparation - Bleed Tool Assembly

1

  • Assemble the bleeding tool as shown
  • Use teflon thread sealing tape if necessary
    • Note: Be sure the arrows on the check valve are pointing towards 58-3050

B-Axis Bleeding

1

  • Home the B-Axis
  • Press MDI, program "M11", press cycle start.
  • Press the Emergency Stop button
  • Open the lube panel on the tool-changer side of the machine
  • Rotate the air shut off valve to cut off air the the machine
    • The wings of the valve should be perpendicular to the pipe

 

2

Purge excess air pressure from the machine by pulling and holding the ring on the purge valve until you no longer hear air escaping.

Note: The initial pull of the ring will make a popping sound. This is normal.

 

3

  • Remove access plug
  • To do so, drill a pilot hole then, screw in a wood screw to use as a handle to pull the plug out

4

  • Use a T-handle allen wrench to remove the threaded brake bleed plug.
  • Note: Be careful to not drop this plug into the casting.

5

  • Screw in and tighten the bleed tool. 
  • Ready a catch -can to catch any oil bled from the brake system.
  • Attach a clear 1/4" OD hose to the bleed tool and run it to the catch-can.

6

  • Turn air back on. The wings of the the valve should run parallel to the pipe.

7

  • Release Emergency Stop and clear alarms.
  • Open MDI, program "M10", press Cycle Start.
  • The booster will pulse 3 to 5 times in an attempt to build pressure and in doing so will pump out brake fluid.
  • You should recieve alarm 6.4011 Rotary Brake Engagement Failure.
  • Clear the alarm and repeat until all air bubbles are bled from the system.
  • If you did not recieve this alarm, and no oil left the bleed tool, check to see that the check-valve of the bleed tool is properly oriented.

8

  • When finished, press emergency stop then turn air off again.

9

  • Purge excess air pressure from the machine by pulling and holding the ring on the purge valve until you no longer hear air escaping.

10

  • Remove the bleed tool then, quickly reinstall the threaded plug being careful to not drop the plug in the casting.

11

  • Release Emergency Stop
  • Turn air back on
  • Jog the B-Axis, then X-axis, then B-Axis again to ensure the B-Axis brake reliably engages and disengages.
  • Be sure to refill the B-Axis brake fluid resevoir to the appropriate level

12

  • Install a new B-Axis bleed port access plug (20-5715)

C-Axis Bleeding

1

  • Jog the C-axis platter such that the access hole is in the 3 O'clock position. 

2

  • Press MDI, program "M13", press cycle start.
  • Press the Emergency Stop button
  • Open the lube panel on the tool-changer side of the machine
  • Rotate the air shut off valve to cut off air the the machine
    • The wings of the valve should be perpendicular to the pipe

 

3

Purge excess air pressure from the machine by pulling and holding the ring on the purge valve until you no longer hear air escaping.

Note: The initial pull of the ring will make a popping sound. This is normal.

 

4

  • Remove access plug
  • To do so, drill a pilot hole then, screw in a wood screw to use as a handle to pull the plug out

5

  • Use a T-handle allen wrench to remove the threaded brake bleed plug.
  • Note: Be careful to not drop this plug into the casting.

6

  • Screw in and tighten the bleed tool. 
  • Ready a catch -can to catch any oil bled from the brake system.
  • Attach a clear 1/4" OD hose to the bleed tool and run it to the catch-can.

7

  • Turn air back on. The wings of the the valve should run parallel to the pipe.

8

  • Release Emergency Stop and clear alarms.
  • Open MDI, program "M12", press Cycle Start.
  • The booster will pulse 3 to 4 times in an attempt to build pressure and in doing so will pump out brake fluid.
  • You should recieve alarm 7.4011 Rotary Brake Engagement Failure.
  • Clear the alarm and repeat until all air bubbles are bled from the system.
  • If you do not recieve this alarm, and no oil leaves the bleed tool, check to see that the check-valve of the bleed tool is properly oriented.

9

  • When finished, press emergency stop then turn air off again.

10

  • Purge excess air pressure from the machine by pulling and holding the ring on the purge valve until you no longer hear air escaping.

11

  • Remove the bleed tool then, quickly reinstall the threaded plug being careful to not drop the plug in the casting.

12

  • Release Emergency Stop
  • Turn air back on
  • Jog the C-Axis, then X-axis, then C-Axis again to ensure the C-Axis break reliably engages and disengages.
  • Be sure to refill the B-Axis brake fluid resevoir to the appropriate level

13

  • Install a new C-Axis bleed port access plug (22-9087)
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