Great Plains NTA2007HD Operator Manual - Manual (Page 127)

Great Plains Manufacturing, Inc. Contents Index Maintenance and Lubrication 123
04/04/2011 Contents Index 166-283M
Brake Shoe Replacement
Check brakes for wear, contamination and damage sea-
sonally or every 9600 km (6000 miles).
1. Prior to commencing work, review the safety infor-
mation on page 122. Have necessary safety equip-
ment 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. Block the implement wing and rear tires to prevent
movement. Do not set the cart’s parking brakes. The
drums cannot be removed with the brakes set.
Refer to Figure 115
5.
If left hitched, put the tractor transmission in Park,
release tractor service and parking breaks, and dis-
connect 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 equip-
ment 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 pat-
tern is directional.
Refer to Figure 116
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 spin-
dle. 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 127).
13. Keep inner and outer bearing components sepa-
rated. They are different parts.
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Null4:
Figure 115
Air Brake Dump Valve
31377
Possible Asbestos Hazard:
If you are unable to confirm that you are removing and install-
ing 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 proce-
dures not covered in this manual.
Equipment Malfunction Risks:
If shoe replacement is indicated, use only parts supplied or
recommended by Great Plains. Unapproved parts may appear
to fit, but will not function correctly.
Note: Inspection of the brakes may also reveal a need to
refinish drums and/or replace other brake parts. Al-
though 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 dam-
aged inner seal (and repack the inner bearing).
1
Null4:
Figure 116
Hub Removal
31378
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