Suzuki Wagon R Manual page 2892

Brake Drum (for 2WD Model)
Removal
1) Hoist vehicle and remove wheel referring to "Wheel"
Removal in Section 3F.
2) Remove spindle cap (1) as shown (by hammering lightly at 3
locations around it so as not to deform or cause damage to
seating part of cap).
3) Uncaulk spindle nut, remove spindle nut (1).
4) Release parking brake lever.
5) Remove brake drum.
If brake drum can not be removed easily, increase clearance
between brake shoes and drum as follows.
a) Remove console box cap and loosen parking brake cable
adjusting nut (1).
b) Remove adjuster cover on back plate.
c) Insert special tool through hole (2) in back plate.
Special tool
(A): Snap-on Part No. B3404B or equivalent
d) Pressing adjuster actuator (4) to the outside of the vehicle,
turn adjuster (3) with special tool (A) in such direction as
indicated in figure so as to obtain larger clearance.
PARKING AND REAR BRAKE 5C-5