Chamberlain B2212T Installation Manual - English - Page 12

STEP 5 Tighten the Belt, STEP 6 Install the Sprocket Cover,

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Assembly STEP 4 Install the Belt 1. Pull the belt around the idler pulley and toward the trolley. The ribbed side must contact the pulley. 2. Hook the trolley connector into the retaining slot on the trolley as shown (Figure 1). 3. With the trolley against the screwdriver, dispense the remainder of the belt along the rail length toward the motor unit and around the sprocket (Figure 2). The sprocket teeth must engage the belt. 4. Check to make sure the belt is not twisted. Connect the trolley threaded shaft with the master link (Figure 3). a. Push pins of master link bar through holes in end of belt and trolley threaded shaft. b. Push master link cap over pins and past pin notches. c. Slide the closed end of the clip-on spring over one of the pins. Push the open end of the clip-on spring onto the other pin. 5. Remove the spring trolley nut from the threaded shaft. 6. Insert the trolley threaded shaft through the hole in the trolley. HARDWARE Threaded Shaft with Spring Trolley Nut Master Link Figure 1 Trolley Connector Figure 2 Sprocket Retaining Slot Master Link Threaded Shaft Figure 3 12

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12
Assembly
STEP 4 Install the Belt
1.
Pull the belt around the idler pulley and toward the trolley. The ribbed side must contact the pulley.
2.
Hook the trolley connector into the retaining slot on the trolley as shown (Figure 1).
3.
With the trolley against the screwdriver, dispense the remainder of the belt along the rail
length toward the motor unit and around the sprocket (Figure 2). The sprocket teeth must engage the
belt.
4.
Check to make sure the belt is not twisted. Connect the trolley threaded shaft with the master link
(Figure 3).
a.
Push pins of master link bar through holes in end of belt and trolley threaded shaft.
b.
Push master link cap over pins and past pin notches.
c.
Slide the closed end of the clip-on spring over one of the pins. Push the open end of the clip-on
spring onto the other pin.
5.
Remove the spring trolley nut from the threaded shaft.
6.
Insert the trolley threaded shaft through the hole in the trolley.
HARDWARE
Master Link
Figure 3
Threaded Shaft with Spring Trolley Nut
Threaded Shaft
Master Link
Sprocket
Figure 2
Figure 1
Trolley
Connector
Retaining
Slot