LiftMaster 2575 & 3575 Chain Drive Parts

LiftMaster 2575 and 3575 Replacement Parts

The 2575 and 3575 are chain drive openers. They use a different drivetrain from the earlier LiftMaster chain models — the gear and sprocket is the 041A5585-1, not the 041C4220A used on the 1240 through 2565 range, and the trolley is a complete assembly. Check the part numbers below against your unit rather than assuming a part from another model fits.

Motor runs but the door does not move? That is the gear and sprocket assembly — on these two models it is the 041A5585-1 at ref 02. Do not order the 041C4220A; it is a different opener's part.

1. Motor Unit

LiftMaster 2575 3575 chain drive motor unit parts diagram

First part of number below corresponds to diagram number above:

Ref Part # Description
01 041A5615 Chain spreader
02 041A5585-1 Gear and sprocket assembly
02 041B3869-3A Complete trolley assembly
03 041A2817 Gear kit
04 041B4245-1 Line cord, 6 ft
05 041A5484 End panel with all labels
06 041C0279 Light socket
07 K108D0079M Light lens
08C 041A5637 Resistor
09 041A3150 Terminal block with screws
10 041D5563-1 Universal replacement motor and bracket assembly
13 041D3452-2 Limit switch assembly
14 041A5532 Gear case
15 041A2822-1 Interrupter cup
16 041C4398A RPM sensor assembly
17 041AC075-2S Receiver logic board assembly — current replacement
17 041C4398A RPM sensor assembly — second callout
18 041C5588 High voltage wire harness
19 041D0180-1 End panel
— 041A2825 Opener assembly hardware kit
— 041A2770-17 Installation hardware kit

The RPM sensor is called out twice, at 16 and 17 — same part either way. The gear case, resistor, motor and harness on this page are shared with the 2585 and 3585 belt drive openers.

Replacing the logic board? The current board is the 041AC075-2S at ref 17. The earlier 41A5635 and 41AC075-2A are both discontinued. Take the cover off and read the number on the board you are removing — if it is not one of these three, call (866) 965-5599 with it before ordering. The ref 18A low voltage wire harness (041C5587) is also no longer available.

2. Rail, Chain and Trolley

LiftMaster chain drive rail assembly parts diagram

First part of number below corresponds to diagram number above:

Ref Part # Description Fits
01 004A1008 Master link kit All
03 041A4813 Cable pulley bracket All
04 041B3869-3A Complete trolley assembly All
05 041D3484 Chain assembly 7 ft door
05 041D3483 Chain assembly 8 ft door
05 041D3485 Chain assembly 10 ft door
06 83A11-2 Rail grease All
11 K144C0056 Idler pulley All
16 041B0035B Curved door arm All
17 4178B0034B Straight door arm section All
— 041A8094 Door arm kit — curved and straight sections together All

The chain assembly is sized to your door height. Measure the door opening, not the rail. A slack chain can usually be re-tensioned rather than replaced — replace it if links are stiff, the cable is frayed, or the chain has jumped the sprocket. Browse all chain and master links.

Complete rail assemblies

Ref Part # Description Fits
— 1707LM One piece T rail 7 ft door
— 1708LM Complete chain drive rail assembly 8 ft door
— 3707CH Chain I beam rail system 7 ft door
— 3708CH Chain I beam rail system 8 ft door
— 3710CH Chain I beam rail system 10 ft door

3. Safety Sensors and Brackets

LiftMaster safety eye sensor parts diagram

First part of number below corresponds to diagram number above:

Current parts — order these

Ref Part # Description
S1–S2 041-0136 Safety sensor eye kit — sending and receiving eyes, supplied as a matched pair
S3–S4 041A5281-1 Sensor extension brackets
— 041-0155-000 Safety sensor brackets, 2021 to present
— 041B0873 Sunblocker bracket — stops sunlight false-tripping the eye
— Sensor Guards Protective guards, sensors not included
— 041B4494-1 2 conductor bell wire, 26 ft

Superseded part numbers

The current eyes and brackets replace every earlier version, so there is no need to match your old part number — order the current part.

Old Part # Order Instead Notes
41A5034 041-0136 Eye kit used 1997 onward, now superseded
12B484 041A5281-1 Square holed mounting bracket, discontinued
12B485 041A5281-1 Slotted mounting bracket, discontinued
041A5266-1 041-0155-000 Sensor mounting bracket, no longer available

4. Remotes, Wall Controls and Door Hardware

LiftMaster remote, wall control, installation parts and door arm diagram

First part of number below corresponds to diagram number above:

Ref Part # Description Fits
01–02 893MAX 3 button visor remote — universal replacement for all older remotes All
03 10A20 3V coin battery for the remote All
05 10A14 12V battery — 61LM series remotes 61LM
06 041B4494-1 2 conductor bell wire, 26 ft All
07 041A4353 Header bracket, 1993 to current All
08 041A5047 Door bracket All
09 041A2828 Manual release rope and handle assembly All
10 29C128 Remote visor clip All
11 29B137 Remote visor clip — 700 and 800 series remotes 700, 800
12 041A4166 Lighted pushbutton, two wire All
13–15 889LM MyQ control panel 1998 on
— 041A4202-6B Wall control panel, two wire All
— 041A3504 Antenna extender kit All
— 041A3504-1 Antenna extender kit with adapter All
— L6950 Multi purpose spray lube, green All
— L6960 Multi purpose spray lube, blue All

Remote controls

The original remotes for these openers are discontinued. The 893MAX is the universal replacement and works with all the older LiftMaster, Chamberlain and Craftsman openers. It covers 371LM, 971LM, 973LM and 893LM, and is the listed substitute for 81LM, 83LM, 63LM, 753CB, 850CB, 853CB, 953CB, 953EV and Craftsman 53680, 53859 and 53879. Browse all LiftMaster remote controls.

Wall controls — superseded part numbers

Old Part # Order Instead Notes
98LM 889LM Motion detecting control panel, discontinued
398LM 889LM Control panel, discontinued
888LM 889LM Control panel, discontinued

More LiftMaster Parts

All chain drive rail parts  ·  2585 and 3585 belt drive parts  ·  All LiftMaster opener parts  ·  LiftMaster remote controls