Sentra L4-1.8L (QG18DE) (2004)
Clutch Master Cylinder: Service and Repair
Disassembly and Assembly
Disassembly
1. Loosen the push rod lock nut "A" to remove the clevis and the lock nut "A".
2. Remove the dust cover.
3. Remove the stopper ring and stopper, then remove the push rod from the cylinder body. During removal, keep the push rod depressed, to prevent
the piston inside the master cylinder from popping out.
NOTE: Discard the stopper ring and use a new ring for assembly.
4. Remove the piston assembly from the cylinder body.
5. Remove the return spring.
6. Remove the pin using a pin punch, then remove the nipple and seal.
Inspection
Inspect for the following conditions and replace any parts as necessary.
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Damage, wear, rust, and pinholes on the cylinder inner wall
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Damage and deformation of the reservoir tank
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Weak return spring
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Crack or deformation of the dust cover
Assembly
1. Install the return spring.
2. Apply rubber lubricant to the sliding parts of the piston assembly, and insert the piston assembly into the cylinder body.
3. After installing the stopper to push rod, install a new stopper ring while keeping the piston assembly depressed by hand, so that the piston
assembly will not pop out.
CAUTION: The stopper ring cannot be reused. Always use a new stopper ring for assembly.
4. Apply silicone grease, and install the dust cover.
5. Install the clevis to push rod, and tighten lock nut "A" to specification.
Lock nut "A" : 7.8 - 11.8 Nm (0.8 - 1.2 kgf-cm, 69 - 104 inch lbs.)
6. Install the seal and nipple to the cylinder body, and install the pin using a pin punch.