Relay Location And Function - Stiga 2021 Edition PARK 320 P Workshop Manual

Table of Contents

WORKSHOP MANUAL

To check electrically, connect a voltmeter across the coil of the device and activate the circuit that

operates the relay. If the meter indicates no voltage is applied, the cause lies in the control circuit.

If the meter indicates proper voltage across the coil but the device does not function, remove the

power, disconnect the wiring and check the continuity of the coil with an ohmmeter.

The meter should indicate resistance, in the order of 3 to 5 ohms, if the coil is intact. A high resist-

ance indicates an open coil and a defective device.

There are also a number of mechanical issues that may cause the problem. The starter solenoid

used on STIGA machines is a sealed unit used to actuate the starter motor on the engines. These

solenoids may have three or four connections. The two major connections carry high current to

operate the starter motor. The minor connections are connected to the coil and carry the control

current.

To check the solenoid, disconnect the cables to the starter motor, turn the ignition switch to the

start position, and listen for the solenoid to snap inside contacts closed.

If no snap is heard, check across the coils with a voltmeter. The voltage should read 12 volts with

the ignition switch in the «START» position. If no voltage appears, the defect is in the start circuit.

If the voltage is correct, turn off the power and check continuity of the coil with an ohmmeter. If the

coil is open, the solenoid is faulty and must be replaced. If the coil has the proper voltage applied,

and the continuity check indicates the coil is intact, the solenoid plunger is stuck or the contacts

are welded shut and the solenoid must be replaced.

If the solenoid snaps shut, but the starter motor does not work, check the power contacts with an

ohmmeter. If there is no continuity when the solenoid snaps shut, the contacts are faulty and the

solenoid must be replaced.

9.3.8