SERVICE MANUAL
4.
Lift brake shoes from anchor pins and guide
pins.
5.
The brake shoe anchor may now be removed if
desired, by removing nut and lock washer from
anchor pin; then force anchor pin from backing
plate.
6.
Remove cam rollers from brake shoe if not
previously done so.
Vehicles with automatic slack adjusters, refer to the
brake manual section which applies to Automatic
Slack Adjusters.
7.
Mark position of manual slack adjuster in relation
to camshaft and note position of adjusting screw.
Adjusting screw may either be toward or away
from brake chamber mounting surface.
8.
Remove clevis pin connecting brake chamber
push rod to slack adjuster.
9.
Remove lock ring retaining slack adjuster to end
of camshaft and remove slack adjuster from
camshaft. Note location of spacer washers for
reassembly purposes.
10.
Remove camshaft from camshaft bracket.
Brake Groups with Spider
Three basic variations will be found in brake groups
which use spiders.
1.
Eaton brake groups (Fig. 7) use a fixed anchor
pin with open end shoes at anchor end.
2.
Rockwell "P" Series brake groups (Fig. 8) have
removable anchor pins which utilize brake shoes
with closed anchor pin openings (holes).
3.
Rockwell "Q" Series brake groups (Fig. 10) have
removable anchor pins with bushings and open
end anchor location on brake shoes.
Fig. 7 Typical Brake Group with Fixed Anchor Pins
1
Link
5
Return Spring
8
Anchor Pin, Fixed Type
2
Brake Chamber Bracket
6
Lining (Blocks)
9
Shoe Retaining Spring
3
Roller Assembly
7
Open Anchor Pin Hole
10
Spider
4
Camshaft Assembly
CTS-4080W - Page 7
