Chamberlain 3453135556 manual Open Blue Parts Bag, Operator Assembly, Boom is up-side down

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1 OPERATOR ASSEMBLY FOR HELP-1.800.929.3667 OR OVERHEADDOOR.COM

BOOM ASSEMBLY: Use a clean, flat surface.

CAUTION

Drive chain can slide out of booms. Do not run until operator is fully assembled.

NOTE: Boom assemblies are for7foot 6 inch highdoor.

An extension kit for an 8 foot high door is available.

OPEN BLUE PARTS BAG

1.Attach boom strap (Fig. 1-1).

•Place boom strap against boom so that projection on strap mates with second hole from end of boom.

–Place 2 bolts (9) through boom strap and boom.

–Ignore fourth hole. (See NOTE)

–Securely tighten bolts and nuts (10).

FIG. 1-1 Attach boom strap.

[9]	1/4"-20 x 5/8"	[10]
		1/4"-20

NOTE: Your boom has 4 holes in the boom strap end. The hole furthest away from the end is for an extension kit if needed.

CAUTION

Make sure that the carriage magnet is in place in the top of the carriage slide.

2.Slip carriage into carriage slot of boom.

•Flip the boom assembly up-side down.

•Place emergency release lever in “release” position (See below).

–Check arrow on the side of carriage points toward door end of boom.

–Slide carriage into boom at power head end (Fig. 1-2).

–Flip boom assembly right-side up.

Boom is up-side down

FIG. 1-2 Align arrow.

Lever in release position.