Kubota RTV1140CPX, Workshop Manual

Page: 251 / 379

BRAKES
RTV1140CPX, WSM
4-S16
Master Cylinder Inner Parts
1. Remove the reservoir (2) from master cylinder body (3).
2. Pushing in the piston (8), remove the internal snap ring (7).
3. Remove the piston from master cylinder body (3).
4. Pushing in the secondary piston (9), remove the stop pin (10).
5. Remove the secondary piston (9) from master cylinder body.
NOTE
• Keep the disassembled parts in order and prevent them
from being contaminated with dust or dirt.
(When reassembling)
• Wash the disassembled parts with the brake fluid and clean
each port with the compressed air.
• Install the new grommet (15) in the reservoir tank.
• Apply the brake fluid to the piston cup (13) and (12).
• Do not reuse the removed piston (8) and secondary piston (9).
• Before installation, tap the valve stem (14) through the slot (11)
of the piston and check that the valve stem moves smoothly.
• Push in the secondary piston, match the slot of the piston with
the stop pin (10) installation hole and insert the stop pin (10).
• Apply a thin coat of special grease (COSMO RUBBER
GREASE BY COSMO OIL CO. or equivalent) to surface of
piston cup (12) and hole of rod seal (4).
9Y1210293BRS0017US0
[3] SERVICING
(1) Front Brake
Brake Disc and Friction Plate Wear (Front)
1. Measure the brake disc thickness and the friction plate
thickness with an outside micrometer.
2. If the thickness is less than the allowable limit, replace it.
9Y1210293BRS0018US0
(1) Cap
(2) Reservoir
(3) Master Cylinder Body
(4) Rod Seal
(5) Push Rod
(6) Filter
(7) Internal Snap Ring
(8) Piston (9) Secondary Piston
(10) Stop Pin
(11) Slot
(12) Piston Cup
(13) Piston Cup
(14) Valve Stem
(15) Grommet
Brake disc thickness
Factory specification
3.30 to 3.50 mm
0.130 to 0.138 in.
Allowable limit
3.00 mm
0.118 in.
Friction plate thickness
Factory specification
1.92 to 2.08 mm
0.0756 to 0.0818 in.
Allowable limit
1.52 mm
0.0598 in.
KiSC issued 05, 2014 A