Tulsa RUFNEK 130, Service Manual

Page: 19 / 29

19
L. DRUM SECTION ASSEMBLY
1. After inspecting and replacing the necessary
parts, such as the drum bushings (19),
install the drum (11) onto the output shaft
(20). This part is very heavy and you will
need the assistance of a hoist. With the
weight of the drum supported, install the
brake band assembly (77) and the
capscrews (91), nuts (85), and washers
(86).
2. Install the brake band air cylinder (76)
making sure the rod of the air cylinder is
going through the bracket on the brake band
(77). Secure it to the bracket with the clevis
pin (15) and cotter key (12). Tighten the
adjusting nut on the air cylinder shaft until
there is no space between the drum (11)
and the brake band (77). Then, tighten the
jam nut to secure the adjusting nut.
3. Install the inner thrust collar (46) making
sure the half-moon slots are lined up with
the key slots in the output shaft (20). Tap
the three keys (47) into their slots in the
output shaft.
4. If necessary, install the new drum clutch (14)
using six capscrews (45). Torque to
specified torque (see page 28 of this
manual). Then, align the sliding clutch (13)
with the keys (47) and slide it onto the
output shaft (20). Install the yoke (81) onto
the sliding clutch (13).
5. Install the outer thrust collar (48), aligning
the half-moon slots with the keys (47).
Tightly hold the thrust collar (48) against the
keys and lock down the three set screws
(106).
( Continued on page 19)
You may need to lower the
drum to align the holes in
the brake band with the
holes in the frame.
The brake band may
need to be readjusted
once it’s in the field.