LiftMaster 1355 1355 Manual - Page 10

ASSEMBLY STEP 4 Attach the Chain Spreader and Re-install the Chain MODELS 1356 AND 1346 ONLY • Line up the holes in the chain spreader with the holes in the motor unit as shown. The slot in the chain spreader must fit over the Rail flange (Figure 1). • Securely fasten the chain spreader with the hardware provided. • Remove the trolley threaded shaft from the trolley by loosening the inner nut and lock washer (Figure 2). • Guide the chain around the selected groove in the chain spreader (to engage either the 8-tooth sprocket or the 6-tooth sprocket) as shown (Figure 3). • Continue dispensing the chain forward to the trolley (Figure 4). Reconnect the trolley to the trolley threaded shaft. Proceed to Assembly Step 3 for chain tightening instructions. WARNING To avoid possible SERIOUS INJURY to fingers from CAUTION moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating. USE ONLY THIS TYPE AND SIZE SCREW #8x1" Hex Screw Slot Washers Chain Spreader Figure 1 Rail Flange Chain Spreader Outer Nut Inner Nut Trolley and Washer Threaded Shaft Rail Trolley Figure 2 Chain Spreader Figure 3 8-Tooth Sprocket Motor Unit Mounting Plate 6-Tooth Sprocket Motor Unit Mounting Plate Chain Spreader Install Chain In This Direction Sprocket Figure 4 10