Doosan DA40 - Park brake Maintenance

SHOP MANUAL
DRIVE LINE
Ch 3 page 66 Ch 3 page 67
DRIVE LINE
Hydraulic Fluid
Use only the type of hydraulic uid specied In the Doosan Operating & Maintenance Manual. Do not
use different types of hydraulic uid. Using incorrect hydraulic uid will damage the rubber parts of
the caliper. Component damage, loss of braking and serious personal injury can result.
Do not reuse hydraulic fluid. Used fluid can be contaminated and cause incorrect operation.
Serious personal injury can result.
The brake system uses a petroleum based hydraulic fluid (mineral oil) and includes fluids
that meet MIL-H-5606 specifications.
For fluid type and specifications, refer to the Operating & Maintenance Manual
recommendations.
Inspection Schedule
Inspect the brake according to one of the following schedules. Choose the schedule that
provides the most frequent inspection and lubrication interval.
• The chassis lubrication schedule used by your fleet
• The chassis lubrication schedule recommended by the OEM
• A minimum of four times during the life of the linings
• At tire replacement.
Check the Adjusted Chamber Stroke Length
To prevent serious eye injury, always wear proper protection when you perform vehicle maintenance
or service. Do not work under a vehicle supported only by jacks. Jacks can slip or fall over and
cause serious personal injury. Support the vehicle with safety stands. Block the wheels to prevent
the vehicle from moving.
Use the following procedures to check in-service push rod travel.
1. Park the vehicle on a level surface.
2. Place blocks under the wheels.
3. Turn the engine OFF.
4. Check the gauges in the cab. Ensure the tanks contain the correct amount of pressure.
Refer to Table below.
Park brake Maintenance
Pressure Specifications
Brake Type Pressure
Hydraulic Release Brake 1700-3000 psi (117.3-207 bar)
WARNING
WARNING