Komatsu D51EXi -24 Shop Manual page 25

00 INDEX AND FOREWORD
Abbrevia-
Actual word spelled out
tion
NO Normally Open
Open-center Load
OLSS
Sensing System
PC Pressure Compensation Hydraulic system
Palm command control
PCCS
system
PCV Pre-stroke Control Valve Engine
Proportional Pressure
PPC
Control
PPM Piston Pump and Motor
PTO Power Take Off
Power Tilt and power
PTP
Pitch dozer
Roll-Over Protective
ROPS
Structure
Selective Catalytic Re-
SCR
duction
Le Systeme Internation-
SI al d' Unites (Internation-
al unit system)
SOL Solenoid
Tip-Over Protectuive
TOPS
Structure
TWV 2-Way Valve
D51EXI-24, D51PXI-24
Purpose of use (major ap-
plicable machine (*1), or
component/system)
Electrical system, Hydraul-
ic system
Hydraulic system
Steering
(D)
Hydraulic system
Hydraulic system
(D, PC, etc)
Power train system
Work equipment
(D)
Cab and canopy
Urea SCR system
Unit
Electrical system
Cab and canopy
Hydraulic system
Explanation
Characteristics of electrical or hydraulic circuits.
Circuit is normally open if it is not actuated, and it
closes when it is actuated.
Hydraulic system that can operate multiple actua-
tors at the same time, regardless of the load.
A function used to correct oil pressure.
System in which a controller instantly analyses
data from each lever, pedal, and dial, and per-
forms optimum electronic control of the engine
and transmission.
This valve is installed at inlet port of pump and it
adjusts fuel intake amount in order to control fuel
discharged volume of supply pump.
This system is used for controlling proportional
pressure. It moves actuators in proportion to the
oil pressure.
Piston type hydraulic pump and motor.
Power take-off mechanism.
This function performs hydraulic control of the tilt
and pitch of the bulldozer blade.
Sturcture protects the operator who wear the
seatbelt so that he will not be crushed by a ma-
chine when it is tipped. (Operator Protective
structure when tipping)
Structure which is standardized as ISO 3471 or
ISO 12117-2.
It is exhaust gas purifier using urea water con-
verts nitrogen oxides (NO
and water by oxidation-reduction reaction. It may
also be mentioned as exhaust gas purification
catalyst or part of the name of related devices.
Abbreviation for "Le Systeme International d' Uni-
tes". It is the universal unit system and "a single
unit for a single quantity" is the basic principle ap-
plied.
It refers to an actuator consisting of a solenoid
and an iron core that is moved by the magnetic
force when the solenoid is energized.
Sturcture protects the operator who wear the
seatbelt so that he will not be crushed by a ma-
chine when it is overtuned.(Hydraulic excavator
tip-over protective structure)
Structure which is standardized as ISO 12117.
Solenoid valve that switches over direction of
flow.
ABBREVIATION LIST
) to harmless nitrogen
x
00-23