Terex TS14G, Руководство по обслуживанию

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5
Section 250-0000
SM 1784 Rev 2 04-04
Park/Emergency Brake Control Valve
Air line from port '23' of pressure protection valve (6)
directs a constant supply of air to park/emergency
control brake valve (8).
With park/emergency brake control valve (8) lever in
the 'RELEASE' position, the inlet and exhaust ports in
the valve are closed. As a result, air pressure flows to
the brake chambers (10 & 21) via the relay emergency
valves (7 & 20), preventing the spring in the actuator
from applying the parking brake. The park/emergency
brake control lever should always be in the 'RELEASE'
position when driving the machine.
With the park/emergency control valve (8) lever in the
'PARK' position, air pressure is vented through the
exhaust ports in the quick release valves (11 & 22),
allowing the spring brake chambers (10 & 21) to apply
the parking brake.
BRAKE SYSTEM SAFETY PRECAUTIONS
When working on or around brake systems and
components, the following precautions, should be
observed:
1. Always block vehicle wheels. Stop engine when
working under a vehicle. Keep hands away from
actuator push rods and slack adjusters; they may
apply as air system pressure drops.
2. Always carry out ALL servicing operations in
conjunction with WARNINGS and procedures outlined
in the individual component sections.
3. Always ensure there is no pressure in the air
system before attempting to replace brake pads or
shoes; the brakes will automatically apply as air
pressure drops.
4. Never connect or disconnect a pipe or line
containing pressure; it may whip. Never remove a
component or pipe plug unless you are certain all
system pressure has been released.
5. Never exceed recommended pressure and always
wear safety glasses when working.
6. Never attempt to disassemble a component until
you have read and understood recommended
procedures. Some components contain powerful
springs and injury can result if not properly
disassembled. Use only proper tools and observe all
safety precautions pertaining to use of those tools.
7. Use only genuine factory replacement parts and
components.
a) Only components, devices and mounting and
attaching, specifically designed for use in hydraulic
brake systems, should be used.
b) Replacement hardware, tubes, lines, fittings, etc.
should be of equivalent size, type and strength as the
original equipment.
8. Devices with stripped threads or damaged parts
should be replaced. Repairs requiring machining
should not be attempted.
BRAKE FUNCTION CHECKS
WARNING
Make sure the area around the machine is clear
of personnel and obstructions before carrying
out these checks.
Note:
The following checks are not intended to
measure maximum brake holding ability. If NEW brake
pads are fitted, they MUST be burnished as per the
manufacturers recommendations before carrying out
the checks.
Service Brake Holding Ability
1. With the bowl in the 'Fully Raised' position, depress
service brake treadle pedal and move transmission
gear shift selector to 1st gear.
2. Move park/emergency control lever to the
'RELEASE' position.
3. Depress front engine accelerator control and
accelerate engine to 1 350 rev/min. The machine
should not move.
4. Decelerate engine, shift transmission to 'NEUTRAL'
and apply the park/emergency brake before releasing
the service brake.
Braking System - Air Braking System Schematic
Courtesy of Machine.Market