New Holland T4.75F Operator's Manual page 51

Trailer brake (red)
Comes on, with the engine running, when the brakes are applied with the tractor brakes coupled
23
together for road driving. The light comes on whenever the handbrake is on or when the brake
fluid pressure is low.
Fuel level low (amber)
24
The light comes on when the tractor needs refuelling.
Water in fuel (amber)
25
Engine inlake air filter blocked (amber)
26
The light comes on when the engine air filter cartridge is totally or partially clogged and needs
servicing. Stop the tractor and service it as described in maintenance section.
Differential lock (amber)
27
Lights up when the differential lock is ON.
Battery cut-out (amber)
28
It lights up whenever the battery is disconnected from the electric system with the specific control.
3 - CONTROLS/INSTRUMENTS
3-13