
DISC BRAKES
11
2. RUBBER FLUID
6.
3. HOLLOW
7.
AL5
3
Figure
Left Front Disc Brake
View
the piston circumference by its inherent tension. See
Figure
Both pistons are hollow. The open end
of each piston faces the brake disc.
A sheet metal spacer plate with two impressions for
preventing the piston from rotating is installed be-
tween each piston and friction pad and
secured by
the friction pad dowel pins. The two friction pads are
positioned on the right and left of the brake disc
recesses in the caliper halves. Each friction pad con-
sists of a backing plate with friction material, which
is abrasive-coated, bonded to it. The friction pad
assemblies are held in position in the brake caliper by
two dowel pins, secured by slit dowel pin retainers,
and by a cross-shaped retaining spring which is
loaded and positioned under the dowel pins, thus
pressing the friction pads and spacer plates firmly
against the pistons. The front brake line leading from
the brake master cylinder attaches to a distribution
tee from which a brake line leads to each front wheel
caliper. The caliper bores are interconnected by fluid
ducts within the caliper halves.
The front wheel disc brakes have self-adjusting pis-
tons. See Figure
The adjustment of the pads is effected by the pistons
which push the friction pads ahead towards the
brake disc for a distance equivalent to the amount of
friction pad wear. This means that the greater the
wear the closer the pistons move
towards
the brake
disc. A running clearance exists between friction
pads and brake disc when the brakes are in “off”
position. This running clearance is provided
by
the
rubber fluid seals which are positioned in the caliper
half bores and which tightly grip and exert their
pre-load pressure on the pistons. The rubber fluid
seals also prevent the pistons from being pushed into
the caliper half bores more than the distance equiva-
lent to the running clearance. As the friction pads are
adjusted by the pistons, there must be no static pres-
sure in the front brake circuit when the brakes are in
position. Non-existence of a static pressure in
the front brake circuit is achieved by eliminating the
check valve in the brake master cylinder on the front
brake circuit. During brake application the pressure
from the brake master cylinder is transferred to the
pistons in the brake caliper. The pistons move ahead
and press the friction pads against both friction
faces of the rotating brake disc. The force exerted on
the brake pedal determines the pressure of the fric-
tion pads against the brake disc. On releasing the
brake pedal, the brake lines of the front brake circuit,
including the caliper half bores, are relieved of
OPERATION
Содержание 1900 1973
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Страница 48: ...IGNITION SYSTEM lC 27 9 3OlC19 Figure 1 C l 3 Distributor Exploded...
Страница 57: ...I I 1 D 36 1973 OPEL SERVICE MANUAL I Figure 1 D 27 Alternator Exploded View 301D27...
Страница 95: ...j 1J 74 1973 OPEL SERVICE MANUAL i I m Figure 13 1 Windshield Wiper and Horn Opel 1900 Manta...
Страница 96: ...I I WIRING DIAGRAMS lJ 75 Figure lJ 2 Windshield Wiper and Horn Rallye...
Страница 97: ...1 J 76 1973 OPEL SERVICE IMANUAL L J Figure lJ 3 Wind hield Wiper and Horn Gl...
Страница 98: ...I I I WIRING DIAGRAMS 1J 77 I I Figure 1 J 4 Turn Signal and Hazard Flasher Opel 1900 Manta I...
Страница 99: ...I i L I lJ 78 1873 OPEL SERVICE MANUAL Figure lJ 5 Turn Signal and Hazard Flasher GT...
Страница 100: ...I WIRING DIAGRAMS 15 79 I I Figure lJ 6 Oil Fuel Temp Tach Stop and Brake Warning Light GT I...
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Страница 102: ...I WIRING DIAGRAMS lJ 81 r Figure 1 J 8 Blower and Lighter GT...
Страница 103: ...I I lJ 82 1973 OPEL SERVICE MANUAL Figure lJ 9 indicator Lights and Gauges Opel 1900 Manta...
Страница 104: ...I I WIRING DIAGRAMS IJ 83 I Figure 1 J 10 Indicator Lights and Gauges Ratlye...
Страница 106: ...EhMB SWITCH R GHiDOOR 301J12...
Страница 107: ...1 J 86 1973 OPEL SERVICE MANUAL i Figure 1 J l 3 Headlamps Opel 1900...
Страница 108: ...I I I WIRING DIAGRAMS lJ 87 Figure lJ 14 Headlamps Manta...
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Страница 112: ...WIRING DIAGRAMS lJ 91 R Figure lJ 18 Right Parking Tail and Instrument Panel Lighting Opel 1900 Manta...
Страница 113: ...1 J 92 1973 OPEL SERVICE MANUAL d 5 Figure 1 19 Starting lgniiion and Charging Opel 1900 Manta...
Страница 114: ...I I WIRING DIAGRAMS lJ 93 I Figure lJ 20 Starting Ignition and Charging GT...
Страница 115: ...1 J 94 1973 OPEL SERVICE MANUAL i I I Figure lJ 21 Instrument Panel GT...
Страница 116: ...I I 1 I WIRING DIAGRAMS lJ 95 Figure lJ 22 A C Generator and Regulator All Models...
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Страница 120: ...WIRING DIAGRAMS lJ 99 Figure lJ 26 Seat Belt Warning System Automatic Transmissionl GT...
Страница 121: ...lJ 100 1973 OPEL SERVICES MANUAL I Figure 1 J 27 Heated Rear Glass Opel 1900 Manta...
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Страница 502: ...HOOD FENDERS AND GRILLE G R O U P 8 I I Section I I Page No 1 8A 1 Grille 1 814 2 Hood Fenders and...
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Страница 566: ...REFRIGERANT COMPONENTS ALL MODELS 9B 57 SUPPORT BRACE LARGE Figure 98 84 Compressor Installation GT...
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