Chamberlain B751C - Install the Sprocket Cover; Tighten the Belt


#UUGODN[
56'2  6KIJVGP VJG DGNV
 $[JCPF VJTGCF VJG URTKPI VTQNNG[ PWVQP VJG VJTGCFGF UJCHVWPVKN KVKUHKPIGT VKIJV CICKPUV VJG
VTQNNG[&Q PQV WUG CP[ VQQNU4GOQXG VJG UETGYFTKXGT
 +PUGTV C HNCVJGCF UETGYFTKXGT VKR KPVQ QPG QH VJG PWV TKPI UNQVUCPF DTCEG KV HKTON[ CICKPUVVJG
VTQNNG[
 6KIJVGP VJG URTKPI VTQNNG[ PWVYKVJ CP CFLWUVCDNG YTGPEJ QT C QRGP GPF YTGPEJ CDQWV C
SWCTVGT VWTP WPVKN VJG URTKPI TGNGCUGUCPF UPCRU VJG PWV TKPI CICKPUVVJG VTQNNG[6JKUUGVU VJG
URTKPI VQ QRVKOWODGNVVGPUKQP
Spring
Trolley Nut
Nut Ring Slot
Nut RingNut Ring
AFTER
1-1/4" (3.18 cm)
BEFORE
1" (2.5 cm)
56'2  +PUVCNNVJG URTQEMGV EQXGT
6Q CXQKF RQUUKDNG 5'4+175 +0,74; VQ HKPIGT HTQO OQXKPI ICTCIG FQQT QRGPGT
z #.9#;5 MGGR JCPF ENGCT QH URTQEMGVYJKNG QRGTCVKPI QRGPGT
z 5GEWTGN[ CVVCEJ URTQEMGVEQXGT $'(14' QRGTCVKPI
 2QUKVKQP VJG URTQEMGVEQXGT QXGT VJG URTQEMGVCU UJQYP CPF HCUVGP VQ VJG OQWPVKPI RNCVG YKVJ
Z JGZUETGYU RTQXKFGF
;QW JCXG PQY HKPKUJGF CUUGODNKPI [QWT ICTCIG FQQT QRGPGT 2NGCUG TGCF VJG HQNNQYKPIYCTPKPIU
DGHQTG RTQEGGFKPIVQVJG KPUVCNNCVKQPUGEVKQP
Hex Screw #8x3/8"
(Packed with the sprocket cover)
HARDWARE
Hex Screw
Sprocket Cover