GREAT PLAINS NTA3007HD, Operator'S Manual

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NTA907HD and NTA3007HD Table of Contents Index Maintenance and Lubrication
Great Plains | 166-207M | 02/26/2019 Table of Contents Index 121
Brake Shoe Replacement
Check brakes for wear, contamination and damage
seasonally or every 9600 km (6000 miles).
1. Prior to commencing work, review the safety
information on page 119. Have necessary safety
equipment and tools on hand. Make sure workers
understand the hazards and how to avoid them.
2. Review the entire procedure. Great Plains suggests
performing a complete operation on one wheel, or
one pair of wheels, at a time, so that there are fully-
assembled wheels to use as an assembly reference.
3. Spot the drill on a level surface. Unfold the drill.
4. Block the wing and rear drill tires to prevent
movement. Do not set the drill’s own parking brakes,
as the drums cannot be removed with the brakes set.
Refer to Figure 131
5. If left hitched, put the tractor transmission in Park,
release tractor service and parking breaks, and
disconnect the trailer brakes at the hitch. Set tractor
parking brake only after trailer brake disconnection.
If unhitched, release air brakes by opening dump
valve
. Pull down on cap to release. Push up.
6. Jack up and support one or both drill transport axles.
7. Be wearing and using recommended safety
equipment for the remainder of these procedures.
8. Spin the wheels, checking for evidence of excess
run-out at the braking surface of the drums.
9. Remove wheels. If you have more than one wheel
removed at a time, mark on them where they came
from (L/R and inside/outside), as the tire tread
pattern is directional.
Refer to Figure 132
10. Remove hub/drum assemblies:
Remove the dust cap .
Remove the spindle cotter pin .
Remove the spindle nut .
Remove the spindle washer .
11. Carefully pull hub and drum assembly from
spindle. Outer bearing may fall loose.
12. Inspect inner seal , bearings, hub and drum for
wear and damage - for drum, see “ Brake Drum
Maintenance ” on page 125).
13. Keep inner and outer bearing components
separated. They are different parts.
Possible Asbestos Hazard:
If you are unable to confirm that you are removing and
installing Great Plains approved parts, you may have linings
that contain asbestos.
Some aftermarket brake shoes may
contain asbestos, and require strict, complex and costly
safety procedures not covered in this manual.
If shoe replacement is indicated, use only parts supplied or
recommended by Great Plains. The original brake linings, and
Great Plains supplied or approved linings contain no asbestos.
Unapproved parts may also appear to fit, but will not function
correctly.
 Inspection of the brakes may also reveal a need to
refinish drums and/or replace other brake parts.
Although not strictly part of brake maintenance, you
may need to repack bearings (generally the outer),
and it may be necessary to replace a worn or
damaged inner seal (and repack the inner bearing).
1
Figure 131
Air Brake Dump Valve
31377
1
Figure 132
Hub Removal
29642
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