Suzuki Jimny Service Manual page 284

BRAKES 5-23
INSPECTION
Cylinder Slide Bush
Check slide bush for smooth movement as shown.
If it is found faulty, correct or replace. Apply rubber grease to bush
outer surface. Rubber grease should be the one whose viscosity
is less affected by such low temperature as – 40 °C (– 40 °F).
1. Apply rubber grease
Bush Dust Boot and Cylinder Boot
Check boots for breakage, crack and damage. If defective,
replace.
Piston Seal
Excessive or uneven wear of pad lining may indicate unsmooth
return of the piston. In such a case, replace rubber seal.