INSTALLATION and MAINTENANCE INSTRUCTIONS
MMD24 DIRECT DRIVE ELECTRIC CABLE REELS
All units are provided with right hand rotation unless otherwise specified. This means that cable is pulled off spool top left or bottom right (spool rotates clockwise to wind cable) when viewing spring end of reel. See diagram on parts page.
WARNING
Some reels with large or multiple springs are equipped with a ratcheted adjustment wrench. Follow separate instruc- tions for its use. Failure to use ratcheted wrench, on reels so equipped, could result in serious personal injury.
WARNING
Do not attempt to relieve spring tension using span- ner wrench. Doing so may result in personal injury.
INSTALLATION
1.Insure that machinery to be serviced by reel is at position closest to reel.
2.Securely mount reel in desired position using 3/8"(M10) bolts. Be sure spool is aligned with cable run.
3.Position optional cable guide, if reel is so equipped. See CABLE INSTALLATION DRAWING.
4.Connect free end of cable to junction box on machine or adjust cable stop so that desired length of cable extends from reel.
5.Remove cover plate on spring housing to expose shaft and spring hub. (See Figure 1).
6.Insert spanner wrench into holes in spring hub (Fig 2). Rotate wrench counterclockwise (for standard rotation). Number of 360O turns should match last digit in model number on serial plate. If model number includes an “R”, reel is reverse rotation and wrench must be rotated clockwise. (See EXPLANA-
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| HOUSING |
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| ROTATION |
| PLATE |
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| SPRING |
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Figure 1 | HUB | Figure 2 | SPANNER |
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| WRENCH |
TION |
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on |
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parts |
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Do not exceed number of turns indicated on | |||||
list | |||||
serial plate. | |||||
page.) | |||||
broken spring, sheared shaft or other damage. | |||||
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NOTE: If reel is equipped with ratcheted adjustment
wrench, follow instructions on separate sheet.
NOTE: On reels containing more than one spring, the hubs are connected at the factory. Therefore, by tightening the outer spring, the inside spring(s) will be tightened.
7.Remove collector cover and connect individual supply conductors to collector terminals. See ELECTRICAL CONNECTIONS diagram, on parts page.
MAINTENANCE
Periodically: A. Use compressed air to clean collector assembly and inside of collector housing. Inspect collector assembly for brush wear and pitted slip rings.
B. Inspect cable for wear and check mounting bolts and
other hardware for tightness.
C. Check for broken springs
by pulling about 2/3 cable off
reel and observing “Broken
Spring Indicators” on sides of
spring canisters. See Fig. 3.
NOTE: Bearings and springs are prelubricated and require no periodic maintenance.
SPRING REPLACEMENT
WARNING
Do not attempt to remove spring from its housing. Clock- type springs can be dangerous to handle. Removal of spring from housing could result in personal injury.
The unique SAFETYCHANGE® spring motor consists of a spring and hub sealed within a housing. A replacement spring is supplied sealed in its housing and the old unit should be dis- carded completely.
1.Turn off all electric power.
2.Disconnect cable from machine junction box.
3.Wind all cable onto reel to relieve all spring tension.
4.Remove inspection cover from face of spring housing.
5.Rotate spool clockwise and observe inner shaft. Shaft should rotate clockwise and hub (with spring attached) should remain stationary.
NOTE: Do not attempt to remove spring if resistance is met or hub tends to rotate with shaft.
Continue to rotate spool and strike end of shaft
several sharp blows with a lead hammer or rubber mallet until shaft rotates freely and hub remains stationary.
6.Remove (4) nuts which secure spring motor(s) to frame.
7.Slide spring motor(s) off shaft and discard.
NOTE: On
8.Install replacement spring motor(s), pawls and pawl springs. NOTE: Pawl springs must be located between the pawls and the deepest section of the shaft grooves. Make sure
that pawls and pawl springs are inserted flush with ends of shaft and hub or they may rub against inspection cover.
| PAWL |
| SPRING | |
SPOOL |
| HUB | ||
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SHAFT |
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| SPRING |
| SHAFT | |
| Install |
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SIDE VIEW | END VIEW | GROOVE | ||
against flat |
9.Tighten nuts (and extension bolts) securing spring housing(s) to reel frame.
10.Connect free end of cable to junction box on machine or adjust cord stop so that desired length of cord extends from reel.
11.Tension spring with spanner wrench. Refer to INSTALLATION section.
12.Replace inspection cover.
CONTINUED ON BACK PAGE 