Kubota M7-132, Operator'S Manual

Page: 159 / 332

• If the tractor is operated with the parking brake
set, the parking brake might be damaged.
2.1 When towing a dual-line trailer brake
type trailer
When the parking brake is set to “ON” , the brakes are
applied to wheels on both the tractor and trailer sides,
and the brake performance when parked improves.
(See Trailer brake on page 153.)
3. Trailer brake
The trailer brakes are activated when using the tractor’s
brake pedals. It uses the pressure from the main
hydraulic or air compressor circuit. The braking force
while towing is proportional to the force applied on the
tractor pedals.
It is most useful when towing very heavy loads, this
device considerably increases braking efficiency and
safety.
3.1 Confirmation
This machine is equipped with connectors for
pneumatic and/or hydraulic trailer brakes.
When connecting the trailer, check the trailer side brake
type carefully before correctly connecting the various
hoses.
Connection errors will inhibit full brake performance,
which is extremely dangerous.
Confirm the trailer side brake type with the following
illustration.
Note that some products are equipped with 2 brake
types according to specifications.
(Examples: Dual-line pneumatic brake + single-line
hydraulic brake, dual-line hydraulic brake + single-line
hydraulic brake)
(1) Dual-line pneumatic trailer brake
(2) Dual-line hydraulic trailer brake
(3) Single-line hydraulic trailer brake
(4) Single-line label
(5) Dual-line label
3.2 Dual-line hydraulic trailer brake
(1) Hydraulic control hose (large diameter, green cap)
(2) Hydraulic supplementary hose (small diameter, orange cap)
Connect the 2 hydraulic hoses of the towed vehicle to
the outlets (large diameter and small diameter) of the
tractor. If the 2 hydraulic brake hoses are not
connected, the brake system may malfunction and
accidents may occur. Carefully check the brake
mechanism of the towed vehicle and connect the hoses
correctly.
• The hydraulic control hose (large diameter, green
cap) has the role of transmitting the signal from the
foot brake pedal to activate the trailer brakes.
• The hydraulic supplementary hose (small diameter,
orange cap) has the role of transmitting the signal
of the tractor parking brake to the parking brake of
the towed vehicle. This system increases the
efficiency of the parking brake when parking on
slopes. In addition, it also works in conjunction with
the secondary brake if the foot brake has
malfunctioned.
NOTE :
• Stop the engine and apply the parking brake
before attaching and detaching the hydraulic
hose.
IMPORTANT :
• Make sure to only connect and use a trailer with
hydraulic dual-line trailer brakes.
BRAKE CONTROLS OPERATING THE TRACTOR
M7132, M7152, M7172
153