Transmission Neutral Switch

This switch (figure 5-6) is threaded into the transmission top cover. Switch plunger is depressed by a nub on the shifter drum or shifter gear only when the transmission is in neutral to complete the circuit. A variable number of spacing washers are used to close the circuit only when transmission is in neutral. Switch is permanently assembled

1.

Screw

7.

Retainer

2.

Switch housing cover

8.

Pushbutton switch

3.

Screw

9.

Rubber cap

4.

Rocker switch (Hi-Lo)

10.

Stop light switch

5.

Rocket switch (Run-Off)

11.

Washer

6.

Screw

12.

Button cap

12 12

Figure 5-5. Handlebar Switch Assemblies

Figure 5-6. Neutral Switch

and if it fails to close the circuit when operating plunger is depressed, it must be replaced.

SOLENOID SWITCH

Solenoid switches are designed to close and open electrical circuits electro-magnetically. Switches of this type consist basically of contacts and a winding around a hollow cylinder containing a movable plunger. When the winding is energized by the battery through an external control circuit, the magnetism produced pulls the plunger into the coil. The contact disc attached to the plunger moves against two main switch contacts closing the circuit.

The solenoid switch individual parts are replaceable as shown in exploded view, figure 5-7. The control circuit wire from handlebar starter button is connected to small terminal stud. Battery cable must be connected to the large, longest stud and starter motor cable is connected to the large, shorter stud. If cables are reversed, solenoid coils will remain in circuit and drain battery. See solenoid internal wiring diagram, figure 5-9.

1. Terminal cover 6. Spacer plate 11. Roll pins (2)

2. Small terminal stud nut and lockwasher 7. Pin 12. Armature shaft

3. Large terminal stud nut and lockwasher (2) 8. Cap washer 13. Return spring

4. Bolt 9. Spring 14. Housing

5. Lockwasher 10. Rubber boot

Figure 5-7. Solenoid Switch — Exploded View

Figure 5-8. Test Circuit for Solenoid

STARTER MOTOR TERMINAL

PULL-IN COIL .3 n

STARTER BUTTON TERMINAL---

MAL X

HOLD-IN COIL .6 n

BATTERY

TERMINAL CONTACTOR PLATE

Figure 5-9. Solenoid Internal Wiring Diagram

TESTING SOLENOID SWITCHES

When it is suspected that a solenoid switch is defective, tests should be made of the solenoid coil winding and continuity through the main switch when contacts are in closed position. Using the test circuit described, these two tests can be made simultaneously.

With solenoid disconnected from control circuit, battery and motor, make test circuit connections as follows: (see figure 5-8).

Since solenoid coil requires 12V to actuate plunger closing main switch contacts, use a 12-volt battery. Leads A and B are connected to terminals 1 and 2 (coil terminals) to actuate solenoid with armature shaft in the solenoid. A sharp click should be heard from the solenoid switch when making this connection. No click or a heavy spark at the terminals when connecting wires would indicate either an open or short in the solenoid winding and solenoid switch must be replaced. If the

1980

solenoid winding checks good and plunger does close main switch contacts, there is still a possibility con tacts are badly burned or eroded and will not pass heav> current. (See Figure 5-9.)

1980

Figure 5-10. Starter Relay Internal Wiring Diagram and Test Circuit

LAMPS

0 0

Post a comment