Ecss System - Komatsu WA250-6 Shop Manual

SEN03834-01

ECSS system

(if equipped)
a ECSS: Abbreviation for Electronically Controlled Suspension System
1. HST controller
2. Machine monitor
3. ECSS switch
4. ECSS relay
5. ECSS solenoid valve
6. Speed sensor
7. Bucket tilt PPC oil pressure switch
8. Lift arm lower PPC oil pressure switch
Input and output signals
HST controller
a. Travel speed signal A
b. Travel speed signal B
c. CAN signal
Machine monitor
d. CAN signal
e. ECSS switch "ON" signal
f. ECSS operation signal
g. ECSS cut off signal
h. ECSS cut off (dummy) signal
20
10-920
Outline
When the machine travels at high speed, the
q
damping effect of the accumulator charged
with high-pressure gas and the automatic con-
trol of the lift cylinder circuit relief pressure
under each travel condition damp the vertical
movement of the work equipment and reduce
rocking of the chassis. As a result, the operator
comfort is improved, spillage of material is pre-
vented, and the working efficiency is improved.
Setting method
The ECSS can be enabled only when "ADD" is
q
selected for "5. E.C.S.S." item from the
"Optional device selecting function" of the
machine monitor.
a For the setting procedure, see "Special func-
tions of machine monitor (EMMS)" in Testing
and adjusting.
920 Electrical system, Part 2

ECSS system

WA250, 250PZ-6
1