Shema Elektro Instalacije Za Imt 539 Upd [patched] -

Title: Full Electrical Wiring Diagram (Shema Elektro Instalacije) for IMT 539 – Troubleshooting & Restoration Guide

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If you own an IMT 539 (or the similar 533, 540), you know that the electrical system is one of the first things to cause trouble after 40+ years. Whether you’re restoring a tractor, replacing a dynamo with an alternator, or just chasing a short circuit – having the correct shema elektro instalacije is essential.

Below is a detailed breakdown of the original IMT 539 wiring, color codes, and common upgrades. shema elektro instalacije za imt 539 upd

3. Simplified IMT 539 Wiring Diagram (Text Version)

If you don’t have a scanned image, follow this logical connection sequence:

A. Charging circuit (engine running):
Dynamo (D+) → Regulator (Š) → Regulator (B+) → Battery (+) → Ground (-) → Dynamo (M)

B. Starting circuit (key in START position):
Battery (+) → Starter solenoid terminal 30 → Solenoid coil 50 → Key switch (S) → Battery (-) through engine ground electrical on later ones).

C. Lighting circuit:
Battery (+) → Light switch → Headlights (parallel) → Tail light → Ground (-)
Note: Brake light gets power from the same tail light circuit but through brake pedal switch.

3.2 Krug punjenja

• Alternator (B+ terminal) → akumulator (+)
• Alternator (D+ terminal) → lampica punjenja na tabli → kontakt brava → masa.

1. Osnovni podaci o sistemu

• Napon sistema: 12V
• Akumulator: 12V (najčešće 60–80Ah)
• Alternator: Tip A14 (ili domaći ispravljač)
• Električna oprema:
  • Anlaser (starter)
  • Svetla (kratka, duga, pozicija)
  • Stop svetlo
  • Sirena
  • Pregrevač (za vazduh – kod dizela)
  • Tachometar (ako postoji)

2. Key Components in the Schematic

When looking at the schematic for the IMT 539, you will see the following major subsystems:

• The Charging Circuit:

  • Early models used a Dynamo (Generator) with a mechanical regulator.
  • Later models (and most UPD versions) were upgraded to an Alternator.
  • Review Note: The schematic often shows both options. You must identify which one your specific tractor has. The alternator usually has 3 wires (B+, D+, W) connecting to the regulator and ignition switch.

• The Starting Circuit:

  • Controlled by the ignition switch (positions 0, 1, 2, 3).
  • The key sends a signal to the starter solenoid.
  • Common Issue: The schematic shows a direct wire, but in reality, the connectors often corrode. If the starter doesn't click, check the small wire on the solenoid.

• Lighting System:

  • The IMT 539 UPD is equipped with front headlights (low/high beam), front position lights, rear working lights, and taillights.
  • The control is via a dedicated Light Switch usually located on the dashboard (pull-type).
  • Observation: The schematic often confuses users because the ground for the lights is assumed to be the chassis. If your lights are dim, it is almost always a bad ground connection at the light housing.

• Instrument Cluster:

  • Temperature gauge (mechanical or electrical).
  • Fuel gauge (connected to a float in the tank).
  • Oil pressure gauge/warning light.
  • Tachometer (mechanical cable drive on early models, electrical on later ones).

2. Osnovni Elementi Sheme Elektro Instalacije (IMT 539 UPD)

Prije nego što zaronimo u crtanje šeme, upoznajmo se sa komponentama koje se na njoj nalaze.

| Komponenta | Simbol na šemi | Uloga | |------------|----------------|-------| | Akumulator (12V) | Baterija (+) i (-) | Pokretanje startera i napajanje pri paljenju | | Alternator (A14N3 ili sl.) | Krug sa tri faze | Punjenje akumulatora i napajanje potrošača pri radu | | Starter motor | Veliki krug sa solenoidom | Pokretanje motora | | Brava za paljenje (ključ) | Prekidač sa 4-5 pinova | Uključuje struju za instrumente i starter | | Sijalica punjenja (kontrolna lampa) | Žuto/crveno staklo | Indikacija da alternator ne puni | | Svetla (kratka/duga) | Paralelne linije sa X | Osvjetljenje | | Sedište prekidač (opciono) | Prekidač na masi | Sigurnosno isključenje startera | | Glavni osigurač (20-25A) | Pravougaonik sa X | Zaštita od preopterećenja |