Lift-Master 65 5208 User Manual

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DUAL TROLLEY MODIFICATION

(For Use With Models: T and GT )

65-5208and65-52081

APPLICATION REQUIREMENTS:

This modification is available to model T and GT operators. For 1/2 H.P. and lower drawbar operators use #48 drive chain. For 3/4 H.P. and higher drawbar operators use #41 drive chain.

FUNCTIONS:

Provides stabilization of drive system on very wide (over 22 ft.) standard lift sectional doors utilizing drawbar operators.

Greatly minimizes the risk of damage to the top section of the door which might otherwise occur on very wide door driven by a single, centered drawbar system.

PARTS LIST:

Unpack kit to verify the parts listed below are included. Refer to installation on following pages.

PART NUMBER

DESCRIPTION

QUANTITY

01-12198

INSTRUCTION SHEET, DUAL TROLLEY MODIFICATION

1

 

 

 

10-10203

DOOR CURVED ARM

2

 

 

 

10-10204

DOOR BRACKET

2

 

 

 

12-11438

BEARING ASSEMBLY

2

15-48B14XX

SPROCKET, 48B14 1” BORE

2

75-10170

SLIDER ASSEMBLY

2

 

 

75-10214

STRAIGHT ARM ASSEMBLY

2

75-11502

FRONT IDLER ASSEMBLY, #48 DRIVE CHAIN

SEE NOTE 1

 

 

 

75-11503

FRONT IDLER ASSEMBLY, #41 DRIVE CHAIN

SEE NOTE 2

 

 

 

77-10200

HARDWARE BAG, ST

1

77-11982

HARDWARE BAG FOR MANUAL HOIST

1

 

 

 

86-RPO8-108

ROLL PIN

2

 

 

 

NOTES:

1.(2) Shipped With 1/2 and Lower H.P. Operators.

2.(2) Shipped With 3/4 and Higher H.P. Operators

INSTALLATION INSTRUCTIONS

NOTE: Use the Model “T” or “GT” owners manual for trolley installation, where appropriate, with the following exceptions:

1.For help with any of the following steps refer to the assembly drawing on page 3.

2.The operator powerhead can be mount to either track assembly so the location of the must be decided before starting.

3.Determine the rough spacing of the two tracks, generally they are separated by 1/3 to 1/2 the door width. We have supplied a cross header shaft that is one half the door width.

4.Assemble the operator per the installation manual but with the special idler and coupler assembly at the header end of the track in place of the standard front idler. Be sure the coupler assembly is towards the center of the door.

5.Assemble the second track the same way as the operator but at the operator end of the track install a standard front idler. Be sure the coupler assembly is towards the center of the door.

6.Install the operator in the location that was determined in step 1 and 2.

7.Install the second track assembly, taking care that the two tracks are parallel to each other.

8.Install a 48B14 sprocket on one end of the cross header shaft by drilling through the hub and shaft and securing with a 1/4” x 1-1/2”roll pin. Be sure that the shaft is flush with the sprocket (Refer to Figure 2).

9.Determine the distance between the two coupler sprockets on the track assemblys and cut the cross header shaft to that length. If the shaft is to long and is sagging in the middle you may have to install one or two bearings for extra support. Install the second 48B14 sprocket to the end of the shaft, securing in place the same way as the sprocket in step 8 (Refer to figure 2).

10.Check to see that the two trolleys are spaced the same distance from the header so that the two door arms will be parallel.

11.Install the cross header shaft by butting the sprockets on the shaft against the sprockets on the idler assemblys and wrapping them with the #40 chain and master link (Refer to figure 1).

12. Complete the installation per the trolley instructions.

FIGURE 1

TROLLEY HOIST

IDLER ASSEMBLY

CROSS HEADER

SHAFT

COUPLER SPROCKETS

COUPLE SPROCKETS TOGETHER

WITH #40 CHAIN AND MASTER

LINK

2

DUAL TROLLEY MODIFICATION

TROLLEY HOIST

IDLER ASSEMBLY

SHAFT COUPLING

 

BEARING

STANDARD IDLER

ASSEMBLY

ASSEMBLY

 

TROLLEY HOIST

IDLER ASSEMBLY

TRACK SPACERS

DOOR

POWER HEAD

FIGURE 2

48B14 SPROCKET 1” BORE

1” DIAMETER SHAFT

BE SURE SHAFT IS FLUSH WITH

SPROCKET. DO NOT LET SHAFT

PROTRUDE BEYOND SPROCKET.

DRILL 1/4” HOLE - PIN WITH 1/4” x 1-1/2”ROLL PIN

3

 

© 2000, The Chamberlain Group, Inc.

01-12198D

All Rights Reserved