Great Plains NTA3007 Operator Manual - Manual (Page 146)

142 NTA907 or NTA3007 Table of Contents Index Great Plains Manufacturing, Inc.
166-371M Table of Contents Index 2012-07-02
Install New Brake Shoes
Refer to Figure 149
Brake shoe orientation is with square hold-down bolt
hole
on top, and “L”-shaped adjuster mount lugs
facing away from spindle.
35. Engage bottom web notch of shoe with backing plate
pivot bolt . Apply a thin film of Lubriplate 110 or
similar to that part of the web which is near and
under the plate held by the pivot bolts. Engage top
web notch of shoe with cylinder rod clevis
.
36. Loosely secure shoe to backing plate with shoe
hold down bolt , large flat washer , two spring
washers , and castellated nut . Do not install the
cotter pin at this time.
Note: The spring washers are slightly cupped. Place
them on the bolt with the concave (dished-in) sides
facing each other “()”.
37. Tighten the castle nuts until the spring washers
are flattened. Back the nut off 1/6 turn, plus enough
to align the bolt’s hole with notches in the nut.
Secure castle nuts with cotter pin
.
38. Insert five backing plate studs through dust cover
and spindle weldment. Secure with lock washers
and
1 ⁄
2
-13 nuts .
Re-Install Springs
Refer to Figure 150
39. With link arm
toward front of drill, insert parking
a
brake arm assembly from spindle side of backing
plate, through lower slots in brake shoes.
40. Insert double-bend end of parking brake spring in
hole at rear end of parking brake arm. Hook
single-bend end at small notch in forward arm.
41. At adjuster lugs (top of shoes), insert the
double-bend end of a brake shoe spring through
the hole closer to the shoe web. Hook the
single-bend end through the matching hole on the
other shoe.
42. Hook the double-bend end of the remaining spring
through a lower round hole in a shoe web. Hook
the single-bend end through the matching hole in the
other shoe.
43. Place adjuster assembly on adjuster lugs . The
adjuster pawl is up and to the right as you face the
spindle. Secure with cotter pins .
44. Tighten pivot bolts to
5 ⁄
8
-18 torque specification.
a. The parking brake feature of these hubs is not used on Model NTA907 or NTA3007.
Figure 149
Install Brake Shoes
29642
3
2
4
6
5
7
8
9
1
8
a
d
c
b
2 3
1
4
5
6 7
8 9
8
9 8
a
Leave self-adjuster relaxed. It self-adjusts at first use.
Figure 150
Re-install Brake Springs
29642
2
3
4
5
6
7
8
9
a
b
1
b
c
d
1
2
3
4
5
6
7
8 4
9
a
b