Nilfisk-Advance SC900-28D Service Manual

Contents

35Service Manual – SC900 24 - Electrical SystemSwitches and HarnessGo Switch ReverseSwitchGo SwitchGo SwitchKey SwitchHour MeterSetscrew1 Disconnect the 2 wires from the key switch, and the connector from the hour meter2 If the new harness does not contain a potentiometer, then free up the wires and cut them at the longestlength you can (You can trim their length later )3 If the new harness does contain a potentiometer, then loosen the setscrew on the dial, transfer the dialto the new potentiometer, and remove the old potentiometer from the handle4 Make note of the wire routing through the handle, and replace each of the original switches with thenew harness/switch Note that the reverse switch uses violet and gray wires5 When replacing any of the switches, note the terminallocations Each switch contains a normally-open andnormally-closed contact, but only the normally-opencontacts are used6 If the potentiometer was previously cut, splice the wiresusing crimp connectors7 Reassemble the handle, and follow the Drive Handle Reassembly Notes described on page 36Left/Right Go SwitchesReverse Switches Go Switch Wires