Lift-Master 65 5208 User Manual

DU AL TROLLEY MODIFICATION

(For Use With Models: T and GT )

65-5208 and 65-52081

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.

P

ARTS LIST:

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

PART NUMBER

01-12198
10-10203
10-10204

12-11438
15-48B14XX
75-10170

75-10214
75-11502
75-11503

77-10200
77-11982
86-RPO8-108

NOTES:

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

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

INSTRUCTION SHEET, DUAL TROLLEY MODIFICATION
DOOR CURVED ARM
DOOR BRACKET

BEARING ASSEMBLY
SPROCKET, 48B14 1” BORE

SLIDER ASSEMBLY
STRAIGHT ARM ASSEMBLY
FRONT IDLER ASSEMBLY, #48 DRIVE CHAIN
FRONT IDLER ASSEMBLY, #41 DRIVE CHAIN

HARDWARE BAG, ST
HARDWARE BAG FOR MANUAL HOIST
ROLL PIN

DESCRIPTION

QUANTITY

1
2
2

2
2
2
2

SEE NOTE 1
SEE NOTE 2

1
1
2

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