Nissan Sentra Service Manual: Rear drum brake
BRAKE CALIPER ASSEMBLY : Exploded View

- Shoe hold pin
- Back plate
- Plug
- Brake shoe
- Spring
- Upper spring
- Adjuster
- Return spring
- Brake drum
- Boot
- Piston
- Piston cup
- Spring
- Wheel cylinder
- Bleeder valve
- Cap
- Apply rubber grease
- Apply PBC (Poly Butyl Cuprysil)
grease or silicone-based grease
Apply brake fluid
BRAKE CALIPER ASSEMBLY : Removal and Installation
WARNING:
Clean dust from brake drum and shoe assembly with a vacuum dust
collector to minimize the hazard
of air borne particles or other materials.
CAUTION:
- Do not depress the brake pedal while removing the brake drum
because the pistons may pop out.
- Do not drop the removed parts.
- Do not spill or splash brake fluid on painted surfaces. Brake
fluid may damage paint. If brake fluid is
splashed on painted areas, wash it away with water immediately.
- Do not spill or splash brake fluid on the brake drum.
REMOVAL
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug
openings to prevent fluid from spilling.
- Remove rear wheels and tires using power tool. Refer to WT-47, "Removal
and Installation".
- Drain the brake fluid when removing or disassembling the wheel cylinder
is necessary. Refer to BR-17,
"Drain and Refill".
- Remove the brake drum. Refer to BR-42, "Exploded View".
NOTE:
- Make sure the parking brake lever is fully released prior to removal
of the brake drum.
- The rear wheel hub is housed inside the brake drum.
- Remove the springs (1) by pushing them inward toward the
vehicle and rotating, this will release the shoe hold pins, and the
brake shoe assembly (brake shoes, each spring, and adjuster).
CAUTION:
Do not damage the boot of the wheel cylinder.
- Disconnect the parking brake cable from operating lever.
CAUTION:
Do not bend the parking brake lever.

- Disassemble the brake shoe assembly (brake shoe, each
spring, and adjuster).

- Remove the wheel cylinder with the following procedure.
- Disconnect the brake tube from the wheel cylinder.
- Remove the two bolts and the wheel cylinder from back plate.
INSPECTION AFTER REMOVAL
Check the following items and replace if necessary.
- Check the brake lining for excessive wear, damage, and peeling.
- Check the brake shoe sliding surface for excessive wear and damage.
- Check each spring for settling, excessive wear, damage, and rust.
- Check the adjuster for smoothness, and check it for excessive wear,
damage, and rust.
- Check the back plate for damage, cracks, and deformation.
- Check the wheel cylinder for cracks, damage, and leakage of brake fluid.
- Visually check the brake drum for excessive wear, cracks, and damage
with a pair of vernier calipers.
- Check the drum brake component parts for excessive wear, damage, and
rust.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
- Apply lubrication to the directed areas only.
- Do not damage the wheel cylinder.
- Check the difference between left and right wheel of adjuster.
: Front
Adjuster |
Direction |
Left side |
Left screw |
Right side |
Right screw |

- Shorten the length of the adjuster by rotating it.
- Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease
to the mating surfaces between the adjusters and the brake shoes.
- Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease
to the mating surfaces between the back plates and the brake
shoes.
- Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease to the
pistons.
- Check the component parts of drum brake assembly are installed
properly.
- Check the brake shoe sliding surface and brake drum inner surface
for grease. Make sure that grease does not contact the lining
material.
- Perform the air bleeding when removed or disassembled the wheel
cylinder. Refer to BR-17, "Bleeding Brake System".
- Adjust the brake shoe clearance (parking brake lever stroke) after
installation and air bleeding. Refer to BR-13, "BRAKE LINING :
Inspection".

INSPECTION AFTER INSTALLATION
- Check that the component parts of drum brake assembly are installed
properly.
- Rotate the brake drum and check that there is no drag. Perform the
following procedure if necessary.
- Remove the brake shoe.
- Push the piston.
CAUTION:
Push both sides of the piston simultaneously.
- Install the brake shoe.
- Adjust the brake shoe clearance (parking brake lever stroke). Refer to
BR-13, "BRAKE LINING : Inspection".
- Check drag of rear drum brake again. If any drag is found, disassemble
the wheel cylinder and replace if
necessary. Refer to BR-51, "Disassembly and Assembly".
- Burnish contact surface between brake lining and brake drum after
refinishing or replacing brake lining or
brake drum, or if a soft pedal occurs at very low mileage. Refer to BR-20,
"Brake Burnishing".
ADJUSTMENT AFTER INSTALLATION
Adjust the brake shoe clearance (parking brake lever stroke). Refer to BR-13,
"BRAKE LINING : Inspection".
BRAKE PAD
BRAKE PAD : Exploded View
Cylinder body
Inner shim cover
Inner shim
Inner pad (with pad wear sensor)
Pad retainer
Torque member
Outer pad
Outer shim
Outer shim cover ...
BRAKE PAD
BRAKE PAD : Exploded View
Upper sliding pin bolt
Lower sliding pin bolt
Bushing
Cylinder body
Inner shim cover
Inner shim
Inner pad (with pad wear sensor)
Pad retaine ...
Other materials:
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WARNING
Radio waves could adversely affect
electric medical equipment. Those who
use a pacemaker should contact the
electric medical equipment manufacturer
for the possible influences before
use.
The Intelligent Key transmits radio
waves when the buttons are pr ...
Intake manifold runner control
INTAKE MANIFOLD RUNNER CONTROL : System
Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
Intake manifold runner control valve has a valve portion in the intake
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Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front passenger for certain
types of collision. Information necessary to service the system ...
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