Service Manual

Topdresser 1800 & 2500 Page 4 – 5 Electrical System

Component Testing

For accurate resistance and/or continuity checks, elec-

trically disconnect the component being tested from the

circuit (e.g. disconnect the switch connectors before do-

ing a continuity check on switch).

CAUTION

When testing electrical components for continu-

ity with a multimeter (ohms setting), make sure

that power to the circuit has been disconnected.

Control Handle Switch

The control handle switch is used to activate the Top-

dresser 2500 brush and conveyor by energizing sole-

noid valve coil (S1) on the hydraulic manifold. When the

control handle switch is in the OFF position, the solenoid

is not energized, allowing hydraulic flow to bypass the

brush and conveyor motors.

On machines with serial numbers below 250000000,

the control handle switch is a toggle switch (Fig. 3). On

machines with serial numbers above 250000000, the

control handle switch is a rocker switch (Fig. 4). The

function of either switch type is identical.

Testing

1. Make sure the Topdresser switch wire harness is un-

plugged from the battery harness.

2. Disassemble control handle to gain access to control

handle switch.

3. With the use of a multimeter (ohms setting), deter-

mine whether continuity exists between the switch ter-

minals.

A. When the switch is in the ON position, there

should be continuity between the two switch termi-

nals.

B. When in the OFF position, there should be no

continuity between the switch terminals.

4. Replace switch if necessary. Assemble handle.

5. Connect switch wire harness to battery harness.

1. Handle

2. Toggle switch

3. Switch harness

Figure 3

1. Handle

2. Rocker switch

3. Switch harness

Figure 4

Electrical

System