Dodge Ram Truck 1500-2500-3500. Manual — part 200
7. Tilt the bottom of the caliper (3) over rotor (1) and
under adapter. Then push the top of the caliper
down onto the adapter.
8. Install caliper (6), (Refer to 5 - BRAKES/HYDRAU-
LIC/MECHANICAL/DISC
BRAKE
CALIPERS
-
INSTALLATION) (Refer to 5 - BRAKES/HYDRAU-
LIC/MECHANICAL/DISC
BRAKE
CALIPERS
-
INSTALLATION).
9. Install wheel and tire assemblies and lower vehicle,
(Refer to 22 - TIRES/WHEELS/WHEELS - STAN-
DARD PROCEDURE).
10. Apply brakes several times to seat caliper pistons
and brake shoes and obtain firm pedal.
11. Top off master cylinder fluid level.
CALIPERS-DISC BRAKE
DESCRIPTION
LIGHT DUTY (LD) CALIPERS
The calipers are a single piston type in the rear and dual piston type in the front. The calipers are free to slide
laterally, this allows continuous compensation for lining wear.
HEAVY DUTY (HD) CALIPERS
The calipers are a dual piston type in the front & rear. The calipers are free to slide laterally, this allows continuous
compensation for lining wear.
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BRAKES - BASE - SERVICE INFORMATION
DR/DH
FRONT CALIPERS – SRT-10
The front calipers (1) are a four piston type and the
rear calipers are a dual piston type. The calipers are
free to slide laterally, this allows continuous compen-
sation for lining wear.
OPERATION
When the brakes are applied fluid pressure is exerted
against the caliper piston (2). The fluid pressure is
exerted equally and in all directions. This means pres-
sure exerted against the caliper piston and within the
caliper bore will be equal.
Fluid pressure applied to the piston is transmitted
directly to the inboard brake pad (5). This forces the
pad lining against the inner surface of the disc brake
rotor. At the same time, fluid pressure within the piston
bore forces the caliper to slide inward on the mounting
bolts. This action brings the outboard brake pad lining
(6) into contact with the outer surface of the disc
brake rotor.
In summary, fluid pressure acting simultaneously on
both piston and caliper, produces a strong clamping
action. When sufficient force is applied, friction will
attempt to stop the rotors from turning and bring the vehicle to a stop.
Application and release of the brake pedal generates only a very slight movement of the caliper and piston. Upon
release of the pedal, the caliper and piston return to a rest position. The brake pads do not retract an appreciable
distance from the rotor. In fact, clearance is usually at, or close to zero. The reasons for this are to keep road debris
from getting between the rotor and lining and in wiping the rotor surface clear each revolution.
The caliper piston seal (4) controls the amount of piston (2) extension needed to compensate for normal lining wear.
DR/DH
BRAKES - BASE - SERVICE INFORMATION
5 - 229
During brake application, the seal is deflected outward
by fluid pressure and piston movement(6). When the
brakes (and fluid pressure) are released, the seal
relaxes and retracts the piston (3).
The amount of piston retraction is determined by the
amount of seal deflection. Generally the amount is just
enough to maintain contact between the piston and
inboard brake pad.
REMOVAL
FRONT
CAUTION: Never allow the disc brake caliper to
hang from the brake hose. Damage to the brake
hose will result. Provide a suitable support to
hang the caliper securely.
1. Raise and support the vehicle.
2. Remove the tire and wheel assembly.
3. Compress the disc brake caliper.
4. Remove the banjo bolt and discard the copper
washer.
5. Remove the caliper slide bolts.
6. Remove the disc brake caliper (2).
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BRAKES - BASE - SERVICE INFORMATION
DR/DH
FRONT - SRT-10
CAUTION: Never allow the disc brake caliper to
hang from the brake hose. Damage to the brake
hose will result. Provide a suitable support to
hang the caliper securely.
1. Raise and support the vehicle.
2. Remove the tire and wheel assembly.
3. Compress the disc brake caliper.
4. Remove the banjo bolt (1) and discard the copper
washer.
5. Remove the caliper mounting bolts (3).
6. Remove the disc brake caliper (1).
DR/DH
BRAKES - BASE - SERVICE INFORMATION
5 - 231
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