Ford 134-172 4-Cylinder Gasoline & Diesel Engine Service Manual 40540160 - PDF DOWNLOAD

Page 74

POlVER PLANT Chapter

III

Ignition System

The ignition system (gasoline and LP·Gas tractors only) consists of a primary (low voltage) and a secondary (high voltage) circuit. Figure 1. The battery, ignition switch, primary wiring of the ignition coil, breaker

points and the condenser are in the primary circuit. The secondary circuit is composed of the secondary wiring of the ignition coil, rotor, distributor cap, spark plug wires ( high tension) and the spark plugs.

IGNITION SWITCH

SECONDARY WIRE

The ignition switch is of the "OFF" and "ON" type and is located on the left side of the lower instrument panel.

SPARK PWG WIRES

A. Removal 1. Disconnect the battery ground cable from the

tractor. 2. R aise the hood panel and disconnect the two wires from the switch. 3. Remove the switch attaching nut and lockwasher, then remove the switch from the panel.

B. Installation

VOLTAGE REGULATOR

1. Position the switch in the lower instrument

panel and secure it with a lockwasher and nut. IGNITION SWITCH

FIRING ORDER

1-1·4·3

2. Connect the coil and battery wires to their respective terminals on the switch.

T-l10 3. Connect the battery cable to the tractor.

figure l-Ignition System

74


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