Hubbell Spring Stack Electric Cable Reels Sho Twin User Manual

INSTALLATION and MAINTENANCE INSTRUCTIONS

SHO TWIN SPRING STACK 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.

Clock-type springs provide power for automatic cable take-up.
Spring must be pretensioned at time of installation to insure
that tension is applied to cable at all times. A tension adjustment
spanner wrench is provided with each reel.

WARNING

Some reels with large or multiple springs are equipped

with a ratcheted adjustment wrench. Follow separate

instructions 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 spanner

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.

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 EXPLANATION on parts list page.)

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.

COUNTER-

CLOCKWISE

FOR STANDARD

ROTATION

SPANNER

WRENCH

Figure 1

SPRING

HOUSING

SPRING

HUB

COVER

PLATE

Figure 2

WARNING

Equal number of the specified pre-tension turns

must be applied to both spring stacks.

CAUTION

Do not exceed number of turns indicated on

serial plate. Over-tensioning can cause a

broken spring, sheared shaft or other damage.

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.

“IN” with 2/3

cable off reel–

SPRING OK

BROKEN SPRING

INDICATORS

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.

Bearings and springs

NOTE:

“OUT” with 2/3

cable off reel–

SPRING

BROKEN

Figure 3

are prelubricated and require no
periodic maintenance.

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.

SPRING REPLACEMENT

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 discarded
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 multi-spring reels, be sure to remove and save

dowel pins which connect one spring hub with another. Also

remove snap rings on shaft between spring housings.

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

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

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.

hub or they may rub against inspection cover.

SPOOL
SHAFT

SIDE VIEW

PAWL

SPRING

Install

against flat

CONTINUED ON BACK PAGE

END VIEW

SPRING

HUB

(Spring not

shown)

SHAFT

GROOVE

adjust

ILLUSTRATED PARTS LIST

6

6

7

8

9

9

1

2

3

4

4

5

6

6

7

8

9a

9b

9a

10

11

12

13

12

12

17

16

18

25

21

26

20

23

22

24

19

14

12

15

15

8

10

11

12

13

12

12

14

12

15

15

SHO TWIN SPRING ELECTRIC CABLE REELS

TO DETERMINE ROTATION OF REEL

STANDARD REVERSE

ROTATION ROTATION

when viewing reel from spring motor side.

Cable is payed out and retracted as shown

Always specify SERIAL NUMBER &

MODEL NUMBER when ordering parts.