Great Plains NTA2007 Operator Manual - Manual (Page 127)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 123
2012-01-05 Table of Contents Index 166-372M
Brake Maintenance (Option)
Brakes are self-adjusting, but have maintenance items:
page 123 - Brake Line Charge and Bleed
page 125 - Air Brake Filter Cleaning
page 126 - Brake Drum and Liner Maintenance
Brake Line Charge and Bleed
Equipment Damage Risk:
Never re-use brake fluid. It is hygroscopic (formulated to
absorb water, which can damage system components if not
removed). Dispose of brake fluid per supplier instructions.
Prior to first use, and after replacing any components
that carry brake fluid, and during periodic flushing of the
brake system, the brake lines need to be bled.
1. Spot the drill on a level surface at a safe distance
from any ignition sources (brake fluid is flammable).
Unless conditions are dry and calm, use a sheltered
area, to keep moisture and contaminants out of
brake fluid. Leave the tractor hitched to provide
braking action to systems.
2. Unfold and lower the drill to prevent movement.
Disassembly Impediment Risk:
Do not set tractor parking brake if it operates trailer brakes.
3. Put tractor in Park.
Refer to Figure 104 and Figure 104 (which depict the
hydraulic/manual brake system on an older Model
NTA607HD - the reservoir for the NTA607 air brake system is
similar, but does not have parking brakes)
4.
Clean and dry top of master cylinder reservoir.
5. Remove cap and keep free of contaminants.
Drain Hydraulic Brake Lines
6.
If draining brake system:
A. Remove drain plug at rear of reservoir and
empty reservoir. Re-secure plug.
B. Start the left hub for the following steps.
C. Connect recovery tubing to the bleeder valve
above the brake line. Unscrew valve to open line.
D. Operate tractor brakes to cycle cart brake
system. Continue until no fluid flows at hub.
E. Close valve, and repeat step C and step D for the
other hub.
Refer to Figure 106 (which depicts hydraulic brake system -
tee for air brake system is similar)
F. Disconnect centre port of brake line tee . Cycle
brakes until no fluid flows. Re-secure tee.
Figure 104
Brake Master Cylinder
31245
1
2
Figure 105
Brake Cylinder Bleeder Valve
31246
3
Figure 106
Brake Line Tee
31247
4
1
2
3
4