Chamberlain 8200 1/2 HP owner manual Install the Belt & Set the Belt Tension, Do not use any tools

Assembly Step 4

Install the Belt & Set the Belt Tension

•Drop the notched side of the trolley clip into the retaining slot on top of the trolley (see Figure 1).

•Grasp the clip connector at the end of the belt and slip it through the belt

pulley bracket from behind, around the pulley and toward the trolley.

• Fasten the belt clip connector to the	Belt Clip
trolley clip with a master link:
	Connector

WARNING

Serious injury can result if fingers become entangled in moving opener sprocket. Attach belt cap retainer securely. Never operate opener while your hand is near the opener sprocket.

Figure 1

Master Link	Master
Clip-On Spring	Link Cap

a. Push pins of master link bar through holes in trolley clip and belt clip connector.

b. Push master link cap over pins and past pin notches.

Trolley
Clip	Pin Notch

Slip Belt Clip Connector	Trolley	Master
	Threaded Shaft	Link Bar
around Pulley Bracket
from this direction
and attach to trolley clip

c. Slide clip-on spring over cap and onto pin notches until both pins are securely locked in place.

• With the trolley against the screwdriver,

dispense the belt along the rail and around	Belt
the opener sprocket. The sprocket teeth
	Pulley
must engage the belt (Figure 2).

•Use the second master link to connect the belt to the flat end of the trolley threaded shaft (Figure 1).

Check to make sure the belt is not twisted.

•Remove the screwdriver.

Opener

Figure 2 Sprocket

	Pin Notch
	Master
Belt	Link Bar
Clip Connector

Figure 4		Trolley
		Threaded
	Nut	Shaft
	Ring
Square End

Nut Ring

Slots

Trolley

•Insert the trolley threaded shaft through the hole in the trolley.

•Hold the belt at the trolley shaft to avoid twisting as you thread the spring/trolley nut by hand on the shaft until finger tight against the trolley (Figure 3).

Do not use any tools.

•Insert a screwdriver tip into one of the nut ring slots and brace it firmly against the trolley. (Figure 4)

•Place a 7/16" open end wrench on the square end. Rotate about 1/4 turn until the spring releases and snaps the nut ring against the trolley (Figure 5).

This extends the spring for optimum belt tension.

Figure 3 Figure 5

Trolley	Nut Ring	Trolley	Nut Ring
Trolley
Trolley
Threaded
Shaft	BEFORE		AFTER RELEASE
Spring	1"		1-1/4"
Trolley Nut

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