Terex TS14G, Maintenance Manual

Page: 270 / 376

6
Section 250-0000
Braking System - Air Braking System Schematic
SM 1784 Rev 2 04-04
BRAKING SYSTEM DIAGNOSIS
CONDITION REASON REMEDY
Inadequate braking Low air pressure in brake system Trace brake lines by referring to Fig. 1.
only Install a test gauge at various points in the
system to determine location of trouble. Test
operation of faulty components as outlined in
air brake control component sections. Repair
or replace, as recommended. Check brake air
lines for leaks.
Treadle valve delivery pressure Check operation of air compressor, air drier,
below normal unloader and safety valve. Check air lines for
leaks.
Brake pads need replaced Refer to Section 165-0031, BRAKE PARTS.
Brakes do not apply No air pressure in brake system Trace brake lines by referring to Fig. 1. Install
with normal treadle a test gauge at various points in the system to
valve application to determine location of trouble. Test operation
of faulty component as outlined in air brake
control component sections. Check brake air
lines for leaks.
Restricted or broken tubing or hose Replace tubing or hose line.
line
Park/Emergency Brake Holding Ability
1. With the bowl in the 'Fully Raised' position, move
park/emergency control lever to 'PARK' position and
move transmission gear shift selector to 1st gear.
2. Depress front engine accelerator control and
accelerate engine to 1 350 rev/min. The machine
should not move.
3. Decelerate engine, shift transmission to 'NEUTRAL'
and apply the park/emergency brake.
General
Note: Brake holding effort required to hold a machine
stationary at a specific rev/min can vary from machine
to machine due to differences in engine performance,
powertrain efficiency, etc., as well as differences in
brake holding ability.
Note: As an indication of system deterioration, the
engine rev/min at which point the machine moved, with
the service or park/emergency brakes applied, can be
compared against the engine rev/min your specific
machine was able to hold to on a previous check.
WARNING
If the machine moves during the above checks,
stop the machine, apply the parking brake and
do not operate until the fault has been
corrected.
MAINTENANCE
General
Perform all maintenance as outlined in individual air
component sections, at the service intervals specified
in those sections.
Every Year
Check accuracy of air pressure gauge on the
instrument panel with a test gauge. Replace if
difference is more than 0.3 bar (5 lbf/in²).
Every 2 000 hours/12 months replace air drier
desiccant cartridge.
Courtesy of Machine.Market