Manual File Reel Hub Replacement 1. Unload tape and remove the file reel.
2. Disconnect power from tape unit.
3. Loosen the hub clamp with the clamp screw and slide the hub free of the motor shaft (refer to Figure 6-12A). Take care not to lose the spring inside the hub shaft.
4. Remove the spring from inside the shaft of the removed file reel hub. It will fall out. Drop the spring down the inside of the shaft of the replacement file reel hub.
5. Position the replacement file reel hub on the motor shaft such that the inner flange of the hub is 0.642 (+ .005, -.000) incnes from either of the two reference pads. Hub position tool, STC PN 4012477-01, is available to facilitate this procedure.
6. Tighten the hub clamp screw while maintaining the hub position. Make certain that the hub clamp is secure (130 inch-pounds torque).
7. Remove the three hub cap mounting screws from the original file reel hub to remove the cap, and install the cap on the replacement hub. Tighten the hub cap mounting screws until just snug to prevent damage to the hub cap. Note that the hub latch must be in the open position in order to remove and to install the hub cap.
8. With power on, check the file reel hub for tape rubbing against the reel flanges, as well as runout and wobble.
HUB CAP MOUNTING
SCREW (1 OF 3)
REFERENCE PAD (2 PLACES)
MOTOR SHAFT
HUB BARREL CLAMP
Figure 6-12A. Manual File Reel Hub·
19005
6.5.3.2
9360
Optional Automatic File Reel Hub Replacement 1. Unload tape and remove tape reel.
2. Disconnect power from tape unit.
3. Remove the three screws securing the hub cap on the file reel hub and remove the cap.
4. At the back of the file reel motor, hold the pilot spindle with a 9/16-inch wrench and remove the jam nut. (Refer to Figure 6-128).
5. Hold the file reel hub and use the wrench to thread the connecting rod out of the pilot spindle.
6. Loosen the hub clamp screw (3/16-inch hex) and slide the hub and·
connecting rod free of the motor shaft.
7. Position the replacement file reel hub on the motor shaft such that the inner flange of the hub is 0.643 (+ .005,-.000) inches from either of the two reference pads. Hub position tool, STC PN 4012477-01, is available to facilitate this procedure.
8. Tighten the hub clamp screw while maintaining the hub position. Make certain that the hub clamp is secure (130 inch-pounds torque).
9. Slip the connecting rod assembly through the file reel hub and the motor shaft.
10. Thread the connecting rod into the pilot spindle.
11. Use the wrench to tighten the pilot spindle until the surface of the file reel hub cone is 0.500 (±.005) inches from the inside surface of the hub. Refer to Figure 6-128, Exhibit A.
12. Hold the pilot spindle with the wrench and thread the jam nut tight against the spindle.
13. Reinstall the hub cap on the replacement file reel hub. Tighten the hub cap mounting screws until just snug to prevent damage to the hub cap.
14. With power on, mount a reel of tape and check the file reel hub for tape rubbing against the reel flanges as well as runout and wobble.
EC 44329 6-21
KIT PN 98362-7
/'
HUB CAP . MOUNTING
SCREW
HUB CAP MOUNTING SCREW (1 OF 3)
HUB CAP
.CONNECTING ROO
A,B,C,O ARE ACTUATOR PLATES
BEARING
INNER FLANGE
Figure 6-12B. Automatic File Reel Assembly
19153
6.5.3.3
Automatic File Reel Hub Actuator Diaphram Replacement1. Perform the removal steps of the Automatic File Reel Hub Replacement procedure.
2. Slide the actuator from the file reel motor shaft and carefully separate the plates of the file reel hub actuator to free the rubber diaphrams. (Refer to Figure 6-12B.)
3. Remove the appropriate diaphram from the manifold.
4. Carefully push the replacement diaphram on the manifold until the diaphram tubing extends above the barb on the manifold.
5. Replace the diaphrams between the actuator plates. Slide the actuator on the file reel motor shaft. Take care so that the diaphrams will not be pinched.
6. Perform the replacement steps of the Automatic File Reel Hub Replacement procedure.
6.5.4 MACHINE REEL ASSEMBLY REPLACEMENT
9360
1. Check that the column vacuum is within the specification (Section 5.4.3.1).
2. Unload tape and remove power from tape unit
3. Remove the three screws securing the machine reel hub cap and remove the hub cap and outer flange (see Figure 6-13).
4. Loosen the hub barrel clamp screw (3/16-inch hex) and slide the machine reel free of the motor shaft.
5. Position the replacement machine reel hub on the motor shaft as close as possible to the deck casting without rubbing on the casting.
6. Tighten slightly, but do not secure, the hub barrel clamp such that the clamp applies some pressure on the motor shaft but does not prevent the hub from sliding under pressure.
7. Use a machine reel position tool (STC PN 4012381-01) by backing out the positioning tool center screw as far as possible and installing the tool on the machine reel in the place of the hub cap.
If a machine reel position tool is not available, it is still possible to properly position the machine reel. Install the outer flange and hub cap at this time.
8. With power on, use maintenance program 0 (without tape) and bring up the thread pneumatics mode by actuating the maintenance Start switch only once.
EC 44329 6-23
KIT PN 98362-7
HUB CAP
INNER FLANGE
HUB BARREL OUTER FLANGE
VACUUM SEALING SURFACE
ON THE HUB
VACUUM SEALING RING BOSS
ON THE DECK , CASTING
Figure 6-13. Machine Reel Assembly
19021
9. Remove the pneumatics tubing from the machine reel loaded sensor to use as a vacuum level test paint for a slack tube manometer or Magnehelic gauge (refer to Figure 5-5).
10. Turn the positioning tool center screw clockwise until it contacts the motor shaft. Further turning pulls the machine reel hub away from the deck casting. Continue turning until there is 27 to 33 inches of water vacuum at the test pont.
If the machine reel pOSitioning tool is not being used, manually slide the machine reel slightly out from (or in toward) the deck casting until there is 27 to 33 inches of water vacuum at the test paint.
11. Without changing the position of the hub on the motor shaft, remove the positioning tool (or hub cap) and secure the hub barrel clamp screw.
Check that the hub does not rub on the deck casting.
12. Install the outer flange and hub cap and recheck the vacuum. The vacuum level should still be within the specifications of step 10.
13. Reinstall the pneumatics tubing on the machine reel loaded sensor.
14. With power on, monitor the voltage at the output terminal of the machine reel loaded sensor. Verify that the level changes from + 5 to 0 volts when recording tape is wrapped around the machine reel hub and returns to
+
5 volts when the tape is removed.15. Mount a reel of tape and check for runout, wobble, or tape rubbing against either flange of the machine reel.
6.5.5 REEL MOTOR REPLACEMENT
6.6
6.6.1
9360
1. Disconnect power from tape unit.
2. Perform the removal steps of either the File Reel Hub Replacement procedure (Section 6.5.3) or the Machine Reel Assembly Replacement procedure (Section 6.5.4), as appropriate.
3. Disconnect the reel motor leads cable plug.
4. Support the reel motor and remove the four motor mounting bolts on the front of the deck casting.
5. Use the original hardware to mount the replacement reel motor. Tighten the motor mounting bolts securely (40 inch-pounds torque).
6. Connect the reel motor leads at the cable plug.
7. Perform the replacement steps of either the File Reel Hub Replacement procedure or the Machine Reel Assembly Replacement procedure, as appropriate.