Craftsman 139.53978SRT owner manual Start by reviewing these important safety alert symbols

Models: 139.53978SRT

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Contents

Page

A review of safety alert symbols

2

You'llneed tools

3

Safety information regarding garage door locks

 

and ropes

3

Testing your garage door for sticking, binding

 

and balance

3

Illustrationof sectional door installation

4

Illush'ationof one-piece door installation

5

Carton inventory

6

Hardware inventory

7

Assembly section - pages 8 - 11

 

Assemble the rail & install the trolley

8

Fasten the rail to the opener

9

Install the idler pulley

9

Install chain/cable & attach the sprocket cover

10

Tighten the chain

11

Installation section - pages 11 - 27

 

Installationsafety instructions

11

Determine header bracket location

 

Sectional door

12

One-piecedoor

13

Install the header bracket

14

Attach the rail to header bracket

15

Positionthe opener

16

Hang the opener

17

Install the door control

18

Contents

Page

Install the light and lens

19

Attach emergency release rope and handle

19

Electrical requiramemts

20

Safety reversing sensor information

21

Install the safety reversing sensor

22, 23

Fasten door bracket (sectional door)

24

Fasten door bracket (one-piece door)

25

Connect door arm to trolley (sectional door)

26

Connect door arm to trolley (one-piece door)

27

Adjustment section - pages 28 - 30

 

Travel limit adjustments

28

Force adjustments

29

Test the safety reversing sensor

30

Test the safety reverse system

30

Operation safety instructions

31

Care of your opener

31

Maintenance schedule

31

Operation of your opener

32

Receiver and remote control programming

33

Having a problem?

34, 35

Repair parts, rail assembly

36

Repair parts, installation

36

Repair parts, opener assembly

37

Accessories

38

Index

39

How to order repair parts

40

Warranty

40

Start by reviewing these important safety alert symbols

Mechanical

Electrical

When you see this Safety Symbol on the following pages, it will alert you to the possibility of damage to your garage door and/or the garage door opener if you do not comply with the corresponding

instructions. Read the instructions carefully.

This garage door opener is designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the safety instructions contained in this manual.

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Craftsman 139.53978SRT owner manual Start by reviewing these important safety alert symbols