Great Plains NTA3007HD Operator Manual - Manual (Page 24)

20 NTA907HD or NTA3007HD
166-207M 04/04/2011
Brake Hookup (Option)
Two air drill braking (trailer braking) systems are avail-
able:
• Dual-line air system (Figure 6) with independent cable-
operated parking brake (Figure 8), and
• Single-line hydraulic (Figure 7) with independent
cable-operated parking brake (Figure 8).
In both systems, the tractor’s trailer brake remote port(s)
operate a hydraulic slave cylinder on the drill.
Tractor trailer braking systems are normally integrated
with the tractor brakes, and operate the trailer brakes
when tractor brakes are used during tractor movement.
The trailer braking system may or may not be integrated
with the tractor parking brake system.
Trailer brakes typically are not automatically engaged
when the tractor transmission is in Park, and may not be
engaged by any tractor Emergency Brake.
Both drill systems include an independent cable-oper-
ated parking brake on the drill. The tractor cannot
engage or release the drill’s parking brake system.
Braking Hazards:
Make sure the operator understands when drill brakes are
engaged and when they are released (record tractor behavior
on page 43).
Also understand and implement tractor operational restric-
tions when trailer brakes are used. For example, it is generally
necessary to inter-tie split brakes, and avoid differential
(steering braking) if trailer brakes are used.
Null4.aac:
Null4:
Figure 6
Air Brake System
29578
Null4:
Figure 7
Hydraulic Brake System
29588
Null4:
Figure 8
Drill Parking Brake System
29586