Master Cylinder: Installation

1. Replace the seal sub assembly for the master cylinder assembly with a new part.
   CAUTION: Be careful not to install the seal sub assembly in the wrong location.
   Fig 1: Replacing Seal Sub Assembly For Master Cylinder Assembly

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2. Apply grease to the entire inner diameter of the vacuum booster assembly.

   Preparation items: 

   Grease: Fluorine grease or equivalent 

3. Apply grease to the entire outer diameter of the seal sub assembly.

   Preparation items: 

   Grease: Fluorine grease or equivalent 

4. Apply grease to the entire inner diameter of the seal sub assembly.

   Preparation items: 

   Grease: Silicone grease or equivalent 

5. Apply grease to the entire circumference on the piston rod of the master cylinder assembly.

   Preparation items: 

   Grease: Silicone grease or equivalent 

   CAUTION:

   • Apply fluorine grease to the entire circumference. Areas where application was missed may cause rust.
   • Be careful not to mix up application locations of each grease.

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   (a)	Master cylinder ASSY
   (b)	Piston rod portion
   (c)	Seal sub ASSY
   (d)	Vacuum booster ASSY
   (e)	Fluorine grease application location
   (f)	Silicone grease application location

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   (a)	Vacuum booster ASSY inner diameter (entire circumference)
   (b)	Seal sub ASSY outer diameter (entire circumference)
   (c)	Grease application location

6. Install the master cylinder assembly.

   Tightening torque: 

   13 N.m (1.33 kgf-m, 9.6 ft-lb) 

Tightening torque: 

Brake pipe flare nut: 19 N.m (1.94 kgf-m, 14.0 ft-lb) 

Fig 2: Pressing Brake Pipe Toward Master Cylinder Assembly Side

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