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Brake hookup (option) – Great Plains NTA3007HD Predelivery Manual User Manual

Page 64

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60 NTA907HD

166-207Q

03/29/2010

Brake Hookup (Option)

Two air drill braking (trailer braking) systems are avail-
able:

• Dual-line air system with independent cable-operated

parking brake and

• Single-line hydraulic with independent cable-operated

parking brake.

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.

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.

NTA907HD: Brakes are not standard on this model.

1.

The “service” or “trailer brake” system is controlled
by the tractor. It is connected to the tractor with a sin-
gle hydraulic line or two air lines.

2.

The “parking” or “emergency” brake system is con-
trolled by latching handles on either side, connected
by cables to the brake shoes for that drill side.

(The parking brake system is not a true emergency
brake system, as there is no safe way to set the cable-
operated brakes when the drill is in motion. This manual
therefore refers to it only as a parking brake system.)

Once brakes are assembled on drill test and adjust
brakes:

While the drill axle is still elevated, test both the service
and the parking brake systems. See Operator Manual
page 127 for further instructions.

Figure 110

Air Brake System

29578

Figure 111

Hydraulic Brake System

29588

Figure 112

Drill Parking Brake System

29586

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