Cub Cadet 4 x 4 Volunteer - Manual (Page 190)

Chapter 6 - Hydraulic Brakes
186
MASTER CYLINDER
Before condemning a master cylinder, check the fol-
lowing:
• Leaking lines or fittings
• Leaking caliper piston seals
• Binding caliper slide bushings
• Pedal linkage binding or mis-adjustment
General indications: Blow-by
• If black material has accumulated in the reser-
voir, that is an indication that the seals within the
master cylinder are deteriorating. This condition
does not automatically condemn a master cylin-
der, but should be considered a wear indicator.
• If the rest of the hydraulic system is sound, yet
the pedal sinks or is soft under pressure, the
master cylinder is the most likely culprit.
• A master cylinder with blow-by may have bad
internal seals, but may not leak fluid externally.
General indications: leakage See Figure 6.33.
A master cylinder with a confirmed leak around the
actuator rod that enters the end of the cylinder has
failed and must be replaced before further use of the
vehicle.
To Replace a Master Cylinder:
1. Open and remove the hood for easy access to
the master cylinder:
1a. Tilt the hood forward
1b. Disconnect the wires from the headlights
1c. Disconnect the hood check cables using
a 3/8” wrench.
1d. Remove the hairpin clips that hold the
hood onto the hood support rods.
1e. Slide the hood to the left of the vehicle and
remove it.
2. Lift and safely support the vehicle.
3. Remove the wheels using a 3/4” wrench.
4. Remove the left front spring and damper unit
using a pair of 3/4” wrenches. See Figure 6.34.
NOTE: When the suspension is at full droop, the
spring and damper units are not under load.
They can be safely unbolted and removed with-
out any additional compression devices, unless
they have been modified or adjusted to increase
travel or spring rate.
Figure 6.33
Look for
leakage
Figure 6.34
Left front
spring and
damper unit
Upper
control arm