NTA907HD and NTA3007HD
Maintenance and Lubrication
Great Plains
| 166-207M | 02/26/2019
117
Brake Maintenance (Option)
Brakes are self-adjusting, but there are several
maintenance items:
page 117 - Brake Line Charge and Bleed
page 119 - Air Brake Filter Cleaning
page 119 - 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. Do not set the drill’s own parking brakes,
as this restricts cylinder movement.
3.
Put tractor in Park. Do not set tractor parking brake if
it also operates trailer brakes.
Refer to Figure 122 (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. Con-
tinue 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 124 (which depicts air brake system - tee
for hydraulic brake system is similar)
F. Disconnect center port of brake line tee
. Cycle
brakes until no fluid flows. Re-secure tee.
Figure 122
Brake Master Cylinder
29584
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.
1
Figure 123
Brake Cylinder Bleeder Valve
29585
2
Figure 124
Brake Line Tee
29578
3
Содержание NTA3007HD
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