LiftMaster 8550WLB Owners Manual - Page 9

Assembly, Tighten the Belt

Get LiftMaster 8550WLB PDF manuals and user guides View all LiftMaster 8550WLB manuals
Add to My Manuals
Save this manual to your list of manuals

Page 9 highlights

Assembly 2 Tighten the Belt 1 MODELS 8550W, 8550WL, 8550WLB, 8550WLB-267, 8557W, WLED, WLED-267, 85503, AND 85503-267 1. By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the trolley. Do not use any tools. 2. Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the trolley. 2 3. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the spring to optimum belt tension. Spring Trolley Nut (To motor unit) Nut ring slot 3 Nut Ring BEFORE 1" (2.5 cm) Nut Ring AFTER RELEASE 1-1/4" (3.18 cm) 9

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
9
Assembly
2 Tighten the Belt
MODELS 8550W, 8550WL, 8550WLB, 8550WLB-267, 8557W, WLED, WLED-267,
85503, AND 85503-267
1.
By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the
trolley. Do not use any tools.
2.
Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the
trolley.
3.
Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a
quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the
spring to optimum belt tension.
Spring Trolley Nut
(To motor unit)
Nut ring
slot
Nut Ring
Nut Ring
AFTER RELEASE
1-1/4"
(3.18 cm)
BEFORE
1"
(2.5 cm)
1
2
3