Great Plains NTA3007 Operator Manual - Manual (Page 143)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 139
2012-07-02 Table of Contents Index 166-371M
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 138. 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. Chock the wing and rear drill tires to prevent
movement.
Refer to Figure 144
5.
If left hitched, put the tractor transmission in Park,
release tractor service and parking brakes, 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 145
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 See “Brake Drum
Maintenance” on page 143).
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 after market 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.
Un-approved parts may also appear to fit, but will not function
correctly.
Note: Inspection of the brakes may also reveal a need to
re-finish 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).
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Figure 144
Air Brake Dump Valve
31377
1
Figure 145
Hub Removal
29642
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