Tiller Position Duties, Responsibilities, and Safety
Tiller Position Duties, Responsibilities, and Safety
NFPA 1002 treats a tractor-drawn aerial as a two-person apparatus: a driver/operator in the tractor and a tiller operator in the trailer cab. This domain tests whether you know what the tiller seat owes the crew - steering the trailer bogie, guarding the right side and the overhead, and staying safe in a position that has no hood in front of it.
Core rules
- The tiller operator rides seated and belted in the tiller cab any time the apparatus is moving; no standing, no riding the step, no leaning out to look.
- The tiller wheel steers the trailer's rear axle or bogie. Your job is to place the trailer wheels where you want them, not to drive the tractor.
- You are the driver's eyes low and right and high: curb lines, parked cars, hydrants, dumpsters, tree limbs, signs, wires, bridge heights, and the trailer's front-corner tail swing.
- Monitor trailer tires, wheel seals, and the air gauges. Smoke, dragging, or a soft tire gets called out immediately.
- Keep the intercom live. If you cannot talk to the driver, the apparatus stops.
- Know the height and width of the tiller cab and the swing arc of the trailer's rear before the first turn.
Worked example
A right turn from a 40-ft street into a 30-ft street with cars parked on the right. The driver swings left to open the turn. The tiller operator holds the trailer straight until the tractor's rear axles clear the corner, then steers the bogie so it tracks inside the tractor's path instead of climbing the curb. Reasoning: the trailer cuts the corner at the rear while its front corner swings outward, so the tiller is correcting two errors at once - off-tracking behind and tail swing ahead.
Traps that cost marks
Treating the tiller as a passenger seat; oversteering and swinging the trailer into the curb; waiting for the driver to ask before calling a hazard; unbelted or standing while moving.