Method For Checking Function Of Ecss Accumulator; Method For Checking Function Of Brake Accumulator - Komatsu H75051 Operation & Maintenance Manual

MAINTENANCE
6.
Open the covers (3), (4) and (5) of the slow-blow fuse box.
You can remove the box easily by removing the covers (4)
and (5) with a flat-head screwdriver using the projection (6)
as a fulcrum.
7.
Loosen the screws (7) and (8) and remove them.
When you remove the screws (7) and (8), the slow-blow
fuse (9) comes off along with electric wirings (10) and (11).
8.
Install a new slow-blow fuse to the slow-blow fuse box
along with the electric wirings (10) and (11) with screws (7)
and (8).
9.
Close the covers (3), (4), and (5).
10. Install the slow-blow fuse box to the machine.

METHOD FOR CHECKING FUNCTION OF ECSS ACCUMULATOR

For handling of the accumulator, see "HANDLE ACCUMULATOR AND GAS SPRING (2-40)".
1.
Turn on the ECSS switch.
The function of the hydraulic spring of the accumulator reduces the bounce of the machine by absorbing
the vertical motion of the machine during travel.
2.
Compare the vertical motion of the machine when the ECSS switch is turned to ON position and OFF posi-
tion.
If there is no change in the vertical motion, the accumulator gas pressure has probably dropped.
Ask your Komatsu distributor for inspection.
REMARK
Perform the inspection while the travel speed is 10 km/h or higher. ECSS (Electronically Controlled Suspen-
sion System) does not operate when the travel speed is 5 km/h or lower even if the ECSS switch is turned
on.

METHOD FOR CHECKING FUNCTION OF BRAKE ACCUMULATOR

When the brake pedal is depressed, the hydraulic spring effect of the accumulator actuates the brake smoothly.
If any change is felt in the smoothness of the brake operation during daily operations, the gas pressure in the
accumulator has probably dropped.
Ask your Komatsu distributor for inspection.
REMARK
Even if there is any change in the smoothness, there is no drop in the braking force or brake performance.
MAINTENANCE PROCEDURE
4-39