Great Plains NTA3007 Operator Manual - Manual (Page 139)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 135
2012-07-02 Table of Contents Index 166-371M
Brake Maintenance (Option)
Brakes are self-adjusting, but there are several
maintenance items:
page 135 - Brake Line Charge and Bleed
page 137 - Air Brake Filter Cleaning
page 138 - Brake Drum and Liner Maintenance
Brake Line Charge and Bleed
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 the drill and block the drill tires to prevent
movement.
3. Put tractor in Park. Do not set tractor parking brake if
it also operates trailer brakes.
Refer to Figure 135 (which depicts air brake system - reservoir
for hydraulic brake system is similar)
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 at an outside 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 drill system.
Continue until no fluid flows at hub.
E. Close valve, and repeat step C and step D for
the other outside hub, then the inside hubs.
Refer to Figure 137 (which depicts air brake system - tee for
hydraulic brake system is similar)
F. Disconnect centre port of brake line tee .
Cycle brakes until no fluid flows. Re-secure tee.
Figure 135
Brake Master Cylinder
29584
Machine Damage Risk:
Never re-use brake fluid. It is hygroscopic (formulated to
absorb water. Water can damage system components if not
removed). Dispose of brake fluid per supplier instructions.
1
Figure 136
Brake Cylinder Bleeder Valve
29585
2
1
2
Figure 137
Brake Line Tee
29578
3
3