Craftsman 139.53920D owner manual Assembly Step, Fasten the Rail to the Motor Unit

ASSEMBLY STEP 2

Fasten the Rail to the Motor Unit

•Insert a 1/4"-20xl-3/4 bolt into the cover protection bolt hole on the back end of the rail as shown,,

Tighten securety with a 1/4"-20 lock nuL Do NOT overtighten,

°Remove the two bolts from the top of the motor unit.

°Place the "U" bracket, flat side down onto the motor unit and align the bracket hole with the bolt holes. Fasten with the previously removed bolts

•Align the rail assembly with the top of ihe motor unit.. Slide the rail end onto the "U" bracket, all the

way to the stops that protrude on the top and sides of the bracket,

•Atlach spreader to the motor unit with two screws

HARDWARE SHOWN ACTUAL BtZE

: CAUTION]

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use ONLYthose boitstfastenersmountedin the top of

the opener. ]

Motor Unit

"U" Bracket

BOll

Cover

	©	SLIDE RAIL TO STOPS	""
		ON TOP AND SIDES
		OF BRACKET
		Lock Nut
	Lock Net
Bolt 1/4"_20xl-314"	!/4"-20

ASSEMBLY STEP 3

Chain and Cable

Nnstall lhe Idler Pulley

. Lay the chain/cable beside the rail, as shown, Grasp the end of the cable and pass approximately 12" (30 cm) of cable through the window. Allow it to hang until Assembly Step 5,

-Remove the tape from the idler pulley The inside center should be pro-greased If dry, regrease to ensure proper operation.

-Place the idler pulley into the window as shown,, ° Insert the idler bolt from the top through the rail

and pulley, Tighten with a 3/8" lock washer and nut underneath the rail until the lock washer is

compressed,

•Rotate the pulley to be sure it spins freely

•Insert a 1/4"-20xl-3/4 bolt into the trolley stop hole in the front of the rail as shown Tighten securely with a t/4"-20 lock nut.

HARDWARE SHOWN ACTUAL SIZE ©

Idler Belt Bolt l/4"-20×t.3t4" Lock Nut 1/4%20 Nut 3!8" Lock Washer 3/8"