Lucas Model 9H Electric Windtone Horn Workshop Instructions
Download the complete PDF version using the green download button at the top right of this page for the original Lucas workshop instructions covering Model 9H electric windtone horns. Issued as Lucas Section K–6 in May 1961, this reference explains the horn design, fault checking, adjustment procedure, electrical test data and servicing guidance for both 6-volt and 12-volt units.
The document describes the 9H horn as a diaphragm-operated resonating air-column horn intended for matched high and low note pairs. It explains how to investigate poor horn performance by checking wiring, battery condition, loose mounting bolts and contact breaker adjustment before carrying out internal setup work.
Further sections provide resistance and current-consumption figures, operating frequency data for high- and low-note horns, tightening torque values and a full horn movement setting procedure. The illustrated adjustment diagram identifies the contact breaker screw, slotted centre core and locking nut used during servicing.
Contents Include
- Lucas Model 9H electric windtone horn workshop instructions
- General horn operation and maintenance notes
- Fault checking before horn adjustment
- Contact breaker adjustment procedure
- 6-volt and 12-volt design data
- High-note and low-note frequency specifications
- Centre core locknut and mounting torque settings
- Required electrical test equipment
- Horn movement setup procedure
- Current draw adjustment guidance
- Illustrated adjustment point diagram
