Great Plains NTA3007HD Operator Manual User Manual
Page 127
Maintenance and Lubrication 123
04/04/2011
166-207M
Refer to Figure 135
14. Inspect brake shoe
origin. See Warning at right.
Great Plains supplied shoes are stamped “AL-KO”
on the web face and have bonded linings.
15. Clean brake dust from assembled parts, and from
individual parts as removed.
16. Inspect brake linings
. Check for 1.6mm (
1
⁄
16
in)
minimum thickness (exclude thickness of shoe pad),
and absence of grease, contamination, deep scores,
chipping, or excessive heat fractures. Hairline heat
fissures are not unusual and do not require shoe
replacement.
17. Inspect brake shoe retaining and operating hard-
ware. Check for wear or damage to holes, pins and
springs. Check for weak springs. Springs must com-
pletely retract shoes when brakes are released.
Note: Sound practice is to replace springs when replac-
ing brake shoes.
18. Check wheel cylinder for evidence of leaks.
If no parts need replacing, skip to step 49.
Refer to Figure 136
19. Remove self-adjuster cotter pins
. Release self-
adjuster pawl
and remove adjuster
.
20. As necessary, disassemble adjuster for cleaning.
Inspect adjust pawl and rack for wear and damage.
Great Plains recommends replacing the entire
adjuster if any parts are worn or damaged.
21. Apply thin film of Lubriplate® 110 or similar to self-
adjuster.
Do not allow any lubricants to come in contact with new brake
linings.
22. Release upper spring
between shoes (was under
self-adjuster), and release lower spring
between
shoes.
23. Loosen nuts
on lower shoulder bolts. Push brake
shoes outward at bottom (to allow removal of hand
brake arms).
24. Disconnect hand brake line by uncoupling the brake
arm link
at the clevis pin (not shown).
25. Release lower spring
between hand brake arms.
If this spring differs from the shoe springs, set the
parking brake spring aside.
26. Remove hand brake arm assembly
. Place
spring
with it.
Null4:
Part Failure Hazard:
Do not substitute parts. Incorrect or substandard parts can
cause brake malfunction or failure, resulting in death, serious
injury or property damage. Always re-assemble brakes with
either the removed parts (if serviceable) or Great Plains parts
as specified in the Parts Manual (166-207P).
Figure 135
Brake Shoe ID & Thickness
29643
8
9
8
9
1
2
3
Null4:
Figure 136
Brake Spring Removal
29642
1
2
7
3
5
4
6
8
9
4
5
6
7
8
9
8