Great Plains
| 166-207M | 02/26/2019
122
NTA907HD and NTA3007HD
Maintenance and Lubrication
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
hardware. Check for wear or damage to holes, pins
and springs. Check for weak springs. Springs must
completely retract shoes when brakes are released.
Sound practice is to replace springs when replacing
brake shoes.
18. Check wheel cylinder for evidence of leaks.
If no parts need replacing, skip to step 49.
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.
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 133
Brake Shoe ID & Thickness
29643
8
9
Figure 134
Brake Spring Removal
29642
1
2
7
3
5
4
6
8
9
Summary of Contents for NTA3007HD
Page 2: ...Great Plains 166 207M 02 26 2019 Table of Contents Index ii 166 207M Table of Contents Index ...
Page 4: ...2SF24 and 2SF30 ...
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Page 178: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402 Table of Contents Index ...