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Maintenance reference

ESC calibration

Losi LMT 4WD Solid Axle · LOS04021

LOS04021 LMT 4WD Solid Axle

← Vehicle service reference

Start with the correct reference

Manufacturer procedure for this exact configuration. Follow the cited sequence and its conditions.

Firma 130 SPMXSE1130 throttle calibration: calibration

Losi LMT 4WD Solid Axle (LOS04021), exact factory configuration covered by the cited manual edition.

Before starting

  • Confirm the factory ESC and exact manual edition. Complete transmitter/receiver binding first.

Calibration sequence

  1. Set throttle travel to 100% and center throttle trim.
  2. Connect the battery and switch on the transmitter.
  3. Hold ESC SET while switching the ESC on. Release SET when the red LED flashes, before three seconds. If the LED flashes green, switch off and repeat; green indicates programming mode.
  4. With the trigger neutral, press and release SET. The green LED flashes once and the motor gives one tone.
  5. Hold full throttle and press SET. The green LED flashes twice and the motor gives two tones.
  6. Hold full brake and press SET. The green LED flashes three times and the motor gives three tones.

Final checks

  • The manual states that normal motor operation resumes after calibration. Disconnect the battery after use.
LOS04021 exact maker-attached manual, PDF p. 6

Parts, tools and consumables

No separate parts or tools are listed here. Check the cited instructions for consumables, tools and replacement decisions.

Part links open an exact-model OEM listing. Quantities, reused hardware and condition-dependent replacements may need checking in the manual. A listed part is not an instruction to replace it.

Setup specifications

ESC
Spektrum Firma SMART 130A Brushless ESCStock
Sources
ESC rating
130 A continuousStock
Sources
ESC motor connector
4 mm bullet. Original Firma 130 motor-side bullets; battery IC5 connector is separate.Stock
Sources
ESC mounting dimensions
57.5 × 46 × 38. Original LMT manual envelope; tab inclusion is not specified. The current component table gives a different width. mm (L × W × H)Stock
Sources
Battery connector
IC5Stock
Sources

Keep the axle positions and original units shown. Values describe the cited configuration. Replacement-derived and community figures keep their stated basis.