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4. INSPECTION / CHECK - BRAKE LININGS AND DISK
A. Tools and consumable materials
- Slide gauge
B. Inspection / Check of brake linings
The brake blocks or linings on disk brakes require no adjustment, since wear on the linings is taken up automatically.
When linings are worn, replace them. Check for cracks on disk brake linings. Linings must be replaced if they are cracked or worn, minimum thickness .100 in (2.54 mm).
C. Inspection / Check of brake disk
The disks must also be checked. If their condition is not satisfactory, they should be rectified. The minimum thickness of the brake disks, after rectification should not be less than .227 in (5.77 mm).
Any disk less than .227 in (5.77 mm) thick must be replaced by a new disk.
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PARKING BRAKE
MAINTENANCE PRACTICES
1. SERVICING
None
2. REMOVAL / INSTALLATION - PARKING BRAKE
A. Tools and consumable materials
- Loctite (TB 09-906)
- Red paint
- Loctite (TB 08-013C)
- Blanking caps and plugs
- Hydraulic fluid (TB 02-001)
- Torque wrench 0 - 177 lbf.in (0 - 20 N.m)
B. Removal of the parking brake valve (Figure 201)
1) Release the parking brake.
2) Protect front L.H. cabin floor and front L.H. table.
3) Partly loosen screw (7) attaching control knob (6) to control shaft (8) and remove knob by pulling it rearward.
4) Disconnect microswitch (10) wires.
5) Disconnect pipes (17), (18), (20) and (21) and blank off pipes and valve.
6) Remove bolts (1) attaching support (22) to front table (23), retain washers (24), discard locknuts (25).
7) Disengage the assembly including valve (9), microswitch (10) and control shaft (8) and remove it FWD through pipe passage aperture.
8) On bench, if required, separate support (22), control shaft (8), cam (2), microswitch (10), elbow
unions (16) and (19) and support (14) from valve (9) ; retain bolts (3), (11) and (15), washers (4) and (12) and discard locknuts (5) and (13).
C. Installation of the parking brake valve (Figure 201)
1) Assemble the parking brake assembly if necessary.
NOTE : - Do not forget to insert support (14) between valve (9) and elbow union (19).
- Install elbow union (16) before installing elbow union (19).
- Before coupling valve (9) to control shaft (8) and cam (2), check that the locating marks on control trunnion and valve body coincide.
- Install new locknuts (5) and (13).
- The threads of the taper unions must be smeared with loctite (TB 09-906).
- Paint locating marks on elbow unions (16) and (19) and valve (9).
AAAB
Validity : Hydraulic control 32 42-04Page 201
(BA) JUN 01
1 - Bolt
2 - Cam
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