Operation and maintenance manual

Section 170-0010
3
SM 2253 10-03
SM - 1851
2. Apply grease (Lubriplate Aero or equivalent) to flat
face of new thrust bearing (20).
3. Install and seat new thrust bearing (20) over splined
end of power screw shaft (19) with greased side of
thrust bearing (20) against thrust collar of power screw
shaft (19).
Note: Ensure correct installation of thrust bearing (20)
by verifying that installation was made over the larger
diameter end of power screw shaft (19), and, that thrust
bearing (20) ID lip is towards splined end of power
screw shaft (19).
4. Lubricate threads of power screw shaft (19) with
grease (Lubriplate Aero or equivalent) and screw power
screw shaft (19) into piston (6).
5. Coat outside of piston (6) with grease (Lubriplate
Aero or equivalent) then slide assembled power screw
shaft (19) and piston (6) into cap assembly (22), shaft
end first.
6. Line up gasket (21) and bolt cap assembly (22), with
assembled power screw shaft (19) and piston (6), to
calliper (7) using bolts (2) and washers (3). Tighten bolts
(2) to a torque of 170 - 183 Nm (125 - 135 lbf ft).
Note: Care should be taken not to push piston seal (5)
out of seal groove in calliper (7) when assembling cap
assembly (22), with piston (6) and power screw shaft
(19), to calliper (7).
7. Install new packing (18), wave spring washer (17)
and washer (16) over power screw shaft (19), in the
order shown in Fig. 2.
8. Mount actuator (13) on cap assembly (22) with nuts
(11) and washers (12). Tighten nuts (11) finger tight
only at this stage.
9. Apply coat of grease (Lubriplate Aero or equivalent)
Fig. 2 - Exploded View of Parking Brake Assembly
1 - Brake Pad
2 - Bolt
3 - Washer
4 - Piston Seal
5 - Piston
6 - Calliper
7 - Clevis
8 - Clevis Pin
9 - Cotter Pin
10 - Nut
11 - Washer
12 - Actuator
13 - Snap Ring
14 - Slack Adjuster
15 - Wave Spring Washer
16 - Washer
17 - Packing
18 - Power Screw Shaft
19 - Thrust Bearing
20 - Gasket
21 - Cap Assembly
22 - Journal Bearing
23 - Plug
24 - Pressure Relief Fitting
6
1
4
5
24
23
18
19
20
21
3
2
22
17
15
16
14
13
8
7
9
12
11
10
Parking Brake - Parking Brake and Mounting