AR42.10-W-0660A | Disassemble/assemble wedge unit | 11.11.08 |
MODEL 675, 676, 677, 679, 970, 972, 976
with drum brake (wedge unit made by Lucas Girling)
W42.10-0139-06
1 Circlip
2 Circlip
3 Retaining plate
4 Compression spring
5 Tapered lifter
6 Operating unit
7 Trunnion screw
8 Housing
9 Adjusting sleeve
10 Adjusting ring
11 Compression spring
12 Spring cage
13 Protective cap
14 Adjusting screw
15 Anti-twist lock
16 Adjuster unit
17 Roller tappet
| Disassemble | ||
1 | Remove wedge unit | Model 675, 676, 677, 679 | |
Model 970, 972, 976 | |||
2 | Remove circlip (1) and lift out operating unit (6) | ||
3 | Compress compression spring (4) and press out circlip (2) | ||
4 | Release compression spring (4) and remove together with retaining plate (3) from tapered lifter (5) | ||
5 | Remove protective cap (13) from housing (8) | To do so knock the protective cap (13) using a suitable Drift from the housing (8). | |
6 | Undo adjusting screw (14) and remove protective cap (13) | ||
7 | Remove spring retainer (12) | Remove spring retainer (12) using a suitable lever and a shop-made assembly sleeve. | |
| Assembly sleeve for spring retainer | ||
8 | Remove compression spring (11) | ||
9 | Undo trunnion screw (7) | ||
10 | Remove adjusting sleeve (9) with adjusting ring (10) | The adjusting sleeve (9) and roller tappet (17) must not be separated. | |
11 | Repeat steps 5 to 10 when disassembling the opposite side | ||
| Assemble | ||
12 | Lightly grease inside of housing (8) | ||
13 | Check roller tappet (17) for ease of movement | The roller tappet (17) should be capable of being easily rotated in the adjusting sleeve (9) in a clockwise direction. | |
14 | Lightly grease thread of adjusting sleeve (9) | ||
15 | Install adjusting sleeve (9) with adjusting ring (10) in housing (8) | The groove in the roller tappet (17) must point towards the threaded hole of the trunnion screw (7). | |
16 | Turn in trunnion screw (7) | Make sure that the trunnion screw (7) latches into the groove of the roller tappet (17). | |
| |||
17 | Insert compression spring (11) | ||
18 | Install new spring retainer (12) | ||
| Assembly sleeve for spring retainer | ||
19 | Push new protective cap (13) onto adjusting screw (14) | Lightly grease the thread and groove of the adjusting screw (14), do not damage protective cap (13) when sliding it on. Ensure that the protective cap (13) is seated correctly in the groove. | |
20 | Turn adjusting screw (14) by hand all the way into the adjusting sleeve (9) | ||
21 | Fit protective cap (13) onto housing (8) | To do so drive protective cap (13) using a shop-made drive-in sleeve onto housing (8). | |
| Drive-in sleeve for protective cap | ||
22 | Check anti-twist lock (15) for signs of damage | If necessary: | |
Replace anti-twist lock. | |||
23 | Repeat steps 13 to 22 when assembling the opposite side | ||
24 | Slide compression spring (4) and retaining plate (3) onto tapered lifter (5) | ||
25 | Press compression spring (4) together and fit circlip (2) | ||
26 | Insert operating unit (6) into housing (8) | Grease operating unit (6) before installation. | |
27 | Fit circlip (1) | ||
28 | Fill housing neck of operating unit (6) with grease | ||
29 | Install wedge unit | Model 675, 676, 677, 679 | |
Model 970, 972, 976 |
Wedge unit
Number | Designation | Model | Model | ||
BA42.10-N-1001-19A | Trunnion screw to wedge unit housing | Lucas (Girling) | Nm | 15 | 15 |
Repair materials
Number | Designation | Order number |
BR00.45-Z-1008-06A | Silicone-based grease | A 001 989 28 51 10 |