Chamberlain merlin MT600 Installation And Operating Instructions Manual page 5

7
INSERT CHAIN/BELT INTO RAIL & ASSEMBLE HEADER SLEEVE
Slide pulley bracket (1) and inner trolley (2) into
back (opener end) of rail assembly (3), be sure
to insert pulley bracket as shown with arrow (4)
pointing toward front (header end) of rail (5).
Push bracket toward front (header end) of rail
(5). Insert carriage bolt (6) through header
sleeve bracket (7). Loosely thread spring nut (8)
and flat washer (9) onto carriage bolt. Insert
carriage bolt (6) of header sleeve assembly (7)
into bold cut out in pulley bracket (1). Slide
header sleeve assembly (7) on to front (header
end) of rail (10).
8
ATTACH TROLLEY TO RAIL
Slide outer trolley (1) into the back (opener end) of the rail
assembly (2), be sure end with trolley release arm (3) is
heading in direction of opener. Slide outer trolley down rail
until it engages with inner trolley.
Move the engaged trolley assembly to the midpoint of the rail,
then turn the rail assembly over ready to fasten to opener.
9
FASTEN RAIL TO OPENER AND INSTALL CHAIN/BELT
For Belt drive option, remove the chain drive cog and replace it with the belt drive cog supplied with your rail
assembly. Holding chain (4) or belt (5) out of the way, slide rail (1) onto shim (2) until rail is secure. Take the
chain/belt and wrap it around the sprocket (3). Make sure the teeth on the sprocket have engaged the chain/belt.
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10
ATTACH SPROCKET COVER
For Belt drive option, grease the belt &
sprocket liberally.
NOTE: Be sure to use the correct belt
sprocket cover supplied seperately
with the belt rail kit.
Place sprocket cover (1) on top of the
opener (2), secure with screws (3).
11
ASSEMBLE HEADER SLEEVE
Thread spring nut on carriage bolt until finger tight. Insert a
screwdriver tip (1) into one of the slots of the nut ring (2) and
brace it firmly against the header sleeve. Place an open end
wrench (3) on the square end of the spring nut (4), slightly rotate
nut about 1/4 turn clockwise until nut ring (2) is released against
header sleeve (5). This sets spring to optimum chain tension.
Chain may slip off sprocket if chain/belt is too loose. If chain does
slip re-tighten spring nut by turning nut clockwise a half turn. Do
NOT over-tighten chain/belt.
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