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M T H                                       TROLLEY - 25 Cycles / Hour, 80 Cycles / Day
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Heavy Duty operator for standard lift sectional doors.

In compliance with
UL 325
CSA 22.2/247


Standard Features

  • Continuous duty industrial motor (60Hz)
  • 5L/B V-belt, chain, and sprocket reduction
  • Heavy duty 1" output shaft
  • Ball bearings at all critical points
  • Precision ball bearings on input shaft
  • #410(48) roller chain drive on 1/2 HP
  • #41 roller chain drive on 3/4 HP
  • Door speed: 12"/second
  • Dual heavy-gauge pre-drilled galvanized tracks, up to 12' door height
  • Green baked-on long lasting enamel finish
  • Rotary type limit switches
  • Motor removable without affecting the limits
  • Quick release disconnect arm for manual operation
  • Adjustable friction clutch
  • Full overload protection
  • Unique fuse control circuit protection
  • C2 Wiring, B2 or D1 can be very easily set
  • Pre-wired for open override, door reversal, radio control with external control strip
  • Back room: door height + 4'5" (1350 mm)
  • Head room for tracks: 4" (102 mm)
  • 2 Year Warranty
Main Options: Nema 4/12, Nema 4X, Nema 7/9, dual trolley drive, delay on reverse, timer to close, double limit, Electronic Control Board

Apartment application:
APT Model (Hardwired Circuit): APT1, APT2 and APT4 models incorporate a double 4L/A V-belt (APT3 has a single 4L/A V-belt), timer to close and an extra relay in the control circuit to ensure safety reverse during the complete door travel.

APE Model (Electronic Control Board): All APE0 models include an electronic control board, single 4L/A V-belt and pillow block bearings on the input shaft.

Both the APT and APE models are supplied with tracks and #41 chain for a 12ft high door. The door opening speed is reduced to 9"/s for a quieter operation and longer lifetime. Note: Please consult factory for operators with an instant reverse motor.

Available Documentation

Specification Sheet
Shop Drawing
3-Part Architect Specifications
Installation & Instruction Manual
Exploded View

Installation & Instruction Manual MTHW/C
Specification Sheet MTH-APT
Specification Sheet MTH-APE
Electrical Drawings


Please select the electrical wiring drawing
you wish to view from the menu.

Electronic Control Board Specification Sheet
Electronic Control Board Installation & Instructions Manual

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