Great Plains NTA2007 Operator Manual - Manual (Page 131)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 127
2012-01-05 Table of Contents Index 166-372M
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 126. 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 at a
time, so that there is a fully-assembled wheel to use
as an assembly reference.
3. Spot the drill on a level surface. Unfold and lower the
drill.
4. Chock the transport tires to prevent movement.
Refer to Figure 113
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 the cart transport axle.
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 114
10. Remove hub/drum assembly:
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 131).
13. Keep inner and outer bearing components
separated. They are different parts.
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Figure 113
Air Brake Dump Valve
31377
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.
Equipment Malfunction Risks:
If shoe replacement is indicated, use only parts supplied or
recommended by Great Plains. Un-approved parts may appear
to fit, but will not function correctly.
Note: Inspection of the brakes may reveal a need to
re-finish drums and/or replace other brake parts.
Although not strictly part of brake maintenance,
you may need to re-pack bearings (generally the
outer), and it may be necessary to replace a worn
or damaged inner seal (and re-pack the inner
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Figure 114
Hub Removal
31378
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