KOMATSU VOCABULARY / GLOSSARY Including common acronyms and terminologies. 07/11/06 TERM or ACRONYM Accumulator
Active Mode
Advantage Extended Coverage
DEFINITION A gas and oil pressure holding device; allows emergency use of PPC pilot controls in the event of a diesel power interruption. An approximate 7-10% advantage over previous H/O models and/or competitors as measured in cubic yards per unit of time. This is generally done with maximized engine speed, PEMC, faster functions, and/or harder digging. No Pressure increase is provided; Power Max is still available to boost hydraulic pressure. Komatsu's extended warranty program.
AID
Usually an air-to-air (CAC) radiator type thermal dissipating device for reducing heat formed in turbocharged intake air prior to use in combustion. Can also be an air-to-coolant unit. Alarm Indicating Device
ALT
Alternator
ARSC
Automatic Retard Speed Controller
ASM
Area Service Manager (Essentially same as a DSM.)
AT
Articulated Truck Advanced Technic Contest - an annual troubleshooting skills competition for service technicians hosted by Komatsu Automatic Transmission Controller
After Cooler
ATC ATC
BATT
French word for “advanced” 1. LS By-pass 2. LS EPC Valve 3. LS Select Valve 4. Merge / Divide Valve (Defined separately below) Battery
BCV
Brake Cooling Valve
BF
Before Failure
BHL
CAC
Backhoe Loader Acts as a ‘load-check’ valve to boom up circuits. Prevents leakage of cylinder oil through control valve spools. Usually not hose burst protection. Charge Air Cooler (See After Cooler.)
CARE
Komatsu Service Management System
CAST
Computer Assisted Sales Training
CD
Crawler Dozer
CHE
Compact Hydraulic Excavator Closed-center Load Sensing System. Opposite of OLSS or Open Center type of hydraulic system. Uses a closed center control valve and system to regulate pump flow. (Also see HYDRAUMIND.) A feature to permit full (HP balanced) main oil flow (even over relief), usually during traveling, Power Max, L/O or Active Mode. A hydraulic systems feature designed to save fuel and wear. As main oil pressures rise to very near the relief cracking pressure, either CO Valves (OLSS) or the PEMC system (CLSS) are utilized to reduce flows from all main pumps.
Avance Avance FOUR ACES (Hyd. Excavators)
Boom Holding Valve
CLSS CO Cancel
CO or Cut Off
TERM or ACRONYM
CO Valve (OLSS only)
COMOSY Control Pump (Oil)
DEFINITION A pressure sensing control which functions to reduce the control oil signal between the TVC Valve and the Servo Valve on OLSS pump systems. Normal function provides the “Cut Off” hydraulic system feature. A pilot oil chamber receives a solenoid oil signal from the CO Cancel Solenoid to lock this device open, which is referred to as “C O Cancel” or full, unmodified pump flow – usually intermittent so as to keep heat generation to a minimum. COmmunication MOnitoring SYstem (Avance)
CRI
See Pilot Oil. An electronic device (usually a microprocessor) such as used in pump, engine or governor, air conditioning, or engine emissions controls. Operates actuators based on inputs from sensors, switches or operator selections of modes or features. Common Rail Injection system for diesel engines - meets US EPA Tier II.
CSDDM
Customer Support, Distributor Development Manager (former DSM)
CSM
Customer Support Manager
CSP's
Customer Service Programs
CSS
DAC
Customer Support System (Publications for support via CD-ROM) www.cssnetusa.com - A limited access product support web site featuring parts and service publications and links. Access is by CSS subscription with password. Compact Wheel Loader Standard unit of performance measurement for hydraulic functions that rely on oil flow (displacement) for proper movement speed. Care is required with respect to measurement “postures” or equipment positioning to ensure consistent results. (See also Flow.) Distributor Advisory Council
DAD
Data Acquisition Device
DataKom
DSM
The publishing arm of Komatsu America Corporation (KAC). Applies to PPM. Reduce Flow; piston pumps and motors with variable displacement controlled by varying the piston stroke to reduce or neutralize the flow while the pump continues to rotate. (See also Neutral.) Distributor Information System for Customer Satisfaction Distance Learning System. A combination of video-based, web-based and satellite training system. District Service Manager (Effective 2000 - called CSDDM)
DT
Dump Truck
e-CARE
Extranet based Service Management System
ECM
Engine Control Module
ECMV
Electronic Control Modulation Valve
ECN
Engineering Change Notice Electronic Controlled Suspension System. Ride control system in Komatsu wheel loaders. Engine Idle Switch
Controller
CSS Net CWL Cycle Times
Destroke DISCUS DLS
ECSS EIS
EO
Equipment Manufacturers Institute Equipment Management Monitoring System. A type of monitoring system in the latest Komatsu equipment. Emergency Order (Parts Depots)
E-OLSS
Electronic Open centered Load Sensing System
EMI EMMS
TERM or ACRONYM
EPTC
DEFINITION Electronic Proportional Control. A variable solenoid valve; an electrically operated hydraulic valve which varies the oil pressure output in direct proportion to the amount of electrical current input flowing to the operating solenoid on the valve. Used to electronically control some hydraulic functions (i.e.: LS-EPC to input controller command to “trim” pump flow to 80% to permit 3 speed travel with 2 speed travel motors). Also a style of cab/ controls. Extended Power Train Coverage. A type of warranty policy.
ERL
Engineering Release Letter
ESSU
Engine Speed Sensing Unit Electronic Technical Service Information. Input form and forum for product technical issues; see also MFR. Komatsu information source that can be accessed via the world wide web by internal personnel as well as distributor personnel. Forward
EPC
ETSI EXTRANET F or FWD
FOPS
Factory Campaign The volume of oil displaced in a hydraulic circuit. Measured in volume over time units, such as GPM (Gallons per Minute) or Liters per minute, but in Komatsu Hydraulic Excavators with known volumes of actuators – simply measured in units of cycle times. Falling Object Protection Structure
FST
Field Service Training (See SFTAT.)
G2000
Global Manufacturing and Marketing Long Range Plan Genuine Answers for Land & Environmental Optimization. New logo for the latest Komatsu equipment. General Information Request
FC Flow
GALEO GIR Governor Governor Motor GTI
A controlling device used to maintain pre-established limits in various systems. A stepping servo motor with gearbox attached to and operating a diesel engine’s throttle linkage providing electronically interfaced engine fuel control. Global Training Institute
HSS
Hydraulic Excavator Heavy Equipment & Vehicle Institute at Oklahoma State University, where Komatsu and VICA jointly sponsor a 2-year Technician Scholarship program. Hydro Mechanical Transmission (hydrostatic and mechanical) A FORCE moving at a RATE of speed, used to accomplish work. In Avance Excavators, engine power “produced” is matched to pump horsepower “absorbed” using the PEMC system, which does this through pump regulation. Hydro Static Steering
HST
Hydro Static Transmission (Also see KomStat.)
HYDRAUMIND
HYDRAUlic Mechanical Intelligence New Design (CLSS)
ICSS
Improving Customer Satisfaction through Support A hydraulic venturi type and orifice type device used to signal increase / decrease in OLSS open center (Neutral) flow to the NC Valve, which then destrokes or strokes the variable volume piston pump system in that circuit. This reduces flow, and therefore fuel consumption and wear, when controls are in neutral. Joint Marketing Plan. A joint marketing plan between Komatsu and individual distributors. Joint Follow Up Log. A systematic, structured customer satisfaction and issue resolution system comprised of a triad of customer, distributor and factory members who join as a team to resolve issues and improve products and services.
HE HEVI HMT Horsepower
Jet Sensor
JMP
JoiFUL
TERM or ACRONYM
DEFINITION
Junction Valve
(See Merge/Divide Valve or Travel Junction Valve.)
KAC
Komatsu America Corp.
KAIC
Komatsu America International Company
KCE
Komatsu Component Exchange
KDB
Komatsu de Brazil
KE
Komatsu Europe
KIRD
Komatsu Information on Reliablity & Durability
KLMS
Komatsu Learning Management System
KLTD
Komatsu Ltd. (Parent corporation, Japan)
KMMD
Komatsu Mining Marketing Division
KomStat
Hydrostatic line of products, primarily dozers featuring full hydrostatic drive.
KomTrax
Komatsu (satellite and GPS) tracking system
KOWA
KTPK
Komatsu Oil Wear Analysis program Komatsu Sales Solutions - A multi-part product and selling skills program designed to supply both our internaal sales and distributor sales personnel with the knowledge necessary to meet distributor sales goals. Komatsu Technical Presentation Kit
KUK
Komatsu United Kingdom
KUMD
Komatsu Utility Marketing Division
LAD
Latin American Division
LAR
Latin American Region
LMS
Learning Management System
LOAMS
Lube Oil Analysis Management System Load Sensing. Used with CLSS to signal hydraulic demands for use by the pump’s flow control system. The LS circuit operates at nearly the same pressure as the highest main circuit pressure in use. L S oil also is used as an input to the pressure compensation valves to throttle oil flow in the lower pressure circuits, allowing the initiation of compound functions simultaneously. LS also signals closure of the CLSS unload valves as main oil is being “opened” for use moving a function(s). Device venting metered oil flow out of LS circuit to enhance dynamic stability and fine control by reducing speed of rise (shock) of LS pressure. Same device vents LS pressure to “tank” in neutral, allowing unload valves to open. Provides front / rear isolation of LS circuits at a common passage to the LS By-pass plug, permitting LS pressure to bleed off in neutral. Variable Solenoid Valve outputting a regulated pilot pressure oil signal to the LS Valve. Allows precise, electronic pump flow control (i.e. 80% flow for Mi. travel, etc.). During neutral operation this 2-function valve acts to “unload” (relieve) 2 circuits: LS is unloaded to zero; Main is relieved at unloader set pressure (usually 30-50 kg/cm²). During actuated operation, LS pressure rise causes unload section to close, as relief section rises to nominal system pressure (325 kg/cm²). Also features a pilot-operated relief cut-off to temporarily close relief during “Power-Max” use. Abolished in 1996. Operates the LS Select Valve. Device to isolate the swing LS signal during compound functions by using a pilot signal (from the LS Select Solenoid or other pilot circuit) to close off the swing LS circuit.
KSS
LS
LS By-pass LS Check Valves LS EPC
LS Relief / Main Unload Valve
LS Select Solenoid LS Select Valve
TERM or ACRONYM
MAPT Blade
DEFINITION Devices that simultaneously carry and allow only the highest LS pressure to affect the pressure compensation valves and the pump control system. Flow is only in direction toward the LS check valves and LS end cover (the LS manifold). Load Sensing Valve housed inside a variable displacement hydraulic pump (PPM) assembly. Function is to control main circuit oil draining out of or pressurizing one end (the larger end) of the servo piston, thereby controlling swash plate angle and the pump’s oil output flow. Marketing Administration Data Mart Usually “working” or “actuator” oil representing the majority of the pump’s or system’s flow or horsepower capacity, but can vary from low to maximum flow as well as low (unloader) to maximum relief pressures. Mechanical Angle Power Tilt Blade
MAS
Market-oriented Active Support
MC
Mobile Crusher
MDR Merge / Divide Solenoid
MRA
Machine Down Report Sends a pilot signal to “divide” pump flows at the Merge/Divide Valve as directed by the controller logic, which varies according to model. Solenoid operated device allowing separate hydraulic systems to “share” oil supply from the other pump. Divides to “dedicate” oil flow for exclusive use during certain functions and for testing and adjusting and troubleshooting. Consists of Main spool and LS spool with springs, housing. Major Failure Report (usually but not exclusively a result of many common problems reported via ETSI). MFR inputs requests for product improvements. Motor Grader Not a Model change, but significant enough to track and announce with distinct serial number breaks. Usually several features or product improvements. Message for Operation & Maintenance Data for Service Technicians including BITS revealing circuit or sensor abnormalities and Service or Failure codes including SMR hours since occurrence was logged by the system. Material Return Authorization
MSV
Mobile Service Vehicle - Self-contained service shop on wheels.
NC
Negative Control (an OLSS pump control device) - a.k.a. "Neutral Control" In hydraulic systems this refers to a “Zero Flow” or minimum flow condition caused by the pumps being destroked to permit continued rotation with minimal fuel consumed or horsepower used. (Also see Swash.) Komatsu Avance Excavators require approximately 3% - 10% flow at neutral for reliable CLSS pump control and ensures readiness to respond when work is begun. Optimum Fleet Recommendation
LS Shuttle Valve
LS Valve MADAM Main Oil Circuit
Merge / Divide Valve
MFR MG Minor Change (m/c) MOM Monitor Codes
Neutral
OFR
PA
Open-center Load Sensing System One Stop Shopping - Factory installation of common options and attachments for Chattanooga sourced machines Policy Adjustment
PADS
Printing and Distribution System
PAT Blade
Power Angle Tilt Blade
P-BOSS
Parts BOok Search System (Also see CLSS.) Power Control valve (same function as TVC, but uses the variable solenoid PC-EPC pilot oil signal instead of solenoid plunger force directly applied to the TVC spool). A mechanical/hydraulic control valve.
OLSS OSS
PC
TERM or ACRONYM
PIPS
DEFINITION A variable solenoid valve used to change the controller’s variable electrical current (input) into a variable pilot pressure. This helps operate the PC Valve in sending main oil through the LS Valve drain to destroke a loaded pump to match available engine horsepower. (Also see PEMC.) Palm Command Control System. Joystick steering system found in the latest Komatsu dozers. Parts Distribution Center Pump Engine Mutual Control. The use of TVC or PC valve and controller systems to best match pumps' horsepower demand to available engine power. This maximizes fuel efficiency and hydraulic system reliability. Also enables different modes of excavator operation (H/O, G/O, F/O, L/O, B/O and “Active Mode”). Circuit and/or pump (also known as control oil used at a lower pressure (2550 kg/cm²) than “main oil”) used for the purpose of remotely controlling (piloting) Hydraulic Control Valves using Proportional Pilot Control valves (PPC). Parts Information Product Support - the PDC parts computer network.
PLM
Pay Load Meter
PM
Preventive Maintenance
PMC
Powertrain Management Controller
PMI
Preventative Maintenance Inspections (PM Clinic, PM Tune-up)
PM-Pro
Planned Maintenance
Power
(See Horsepower.)
PPASR
PSI
Product Problem & Action Status Report Proportional Pilot Control valves. Pilot oil signals are “proportioned” in accordance with the amount the operator moves each lever. Also a style of cab/controls. Houses the shuttle valves for pilot signals as well as the location of pressure switch ports for each function. Price & Policy Letter Piston Pumps (and/or) Motors (piston motors) of fixed or variable displacements. In basic hydraulic circuits, pressure equals resistance to flow. In Komatsu Avance Excavators pressure is measured in three hydraulic circuits: main, pilot and load sense (LS). Pressures are measured in Kilograms per square centimeter or kg/cm². Monitor panels on Avance Excavators can produce digital outputs of main circuit pressures for main PPM pumps (front and/or rear). Also commonly referred to as the “load” on a hydraulic actuator. Metering valve installed prior to each spool to balance the load of unequally loaded actuators. This allows oil flows to be directed according to the user’s wishes (inputs) and NOT be load influenced. Also where LS signal is created (IF type). Metering valve installed at each port of each control spool to balance the load of unequally loaded actuators. This allows oil flows to be directed according to the user’s wishes (inputs) and NOT be load influenced. Uses LS oil to meter flows. By-pass switch permitting a function (pump, swing), which needs repair to be operated. Product Service Information
Psi
Pressure staying Inside (A good thing!)
Pso
Pressure squirting out (A bad thing!)
PSSR
Product Support Sales Representative
PC EPC
PCCS PDC
PEMC
Pilot Oil Circuit
PPC PPC Shuttle PPL PPM
Pressure
Pressure Compensation Valve (IF - InFeed type) Pressure Compensation Valve (port type) Prolix
TERM or ACRONYM
DEFINITION
QTQA
Quick Technical Question & Answer
R or REV
Reverse
R&M Contract
Repair and Maintenance Contract
RAMP
Repair and Maintenance Program
RCM
REMAN
Retarder Control Module Device designed to protect the pump side of main oil circuits from over pressurizing beyond their designed “cracking pressures” (i.e. 325 kg/cm² STD, or 355 kg/cm² ‘Hi’ for 2-stage types). Usually designed to accommodate full designed flow capacity. (PC300/400) However, certain single-stage relief valves have dynamics, which allow “nominal” resistance at “nominal” flow rates, so that at “maximum” flows they exhibit a higher resistance (pressure) due to their dynamics acting as a full flow “orifice”. This thereby increases Main circuit pressure with no extra stage or pilot signal, but using the increased flow as the signal. Main Relief valves are used with (solenoid blocked) LS Relief Valves for 355 kg/cm² cracking pressures. (Certain older serial numbered products.) Remanufactured components
ROPS
Roll Over Protection Structure
RT
Rigid Truck
SAC Safety + Suction Valve
Support Aggregate (sand/gravel) Customers A combined assembly of two operating devices, which provide (safety) circuit relief and (suction) anti-cavitation protection to each circuit. Enterprise software for controlling accounting, manufacturing, inventory, etc., used by Komatsu. An automatic device to reduce main pump oil pressure to be used as pilot oil (control oil). Allows elimination of a control pump. A linear actuator hydraulically powering swash plate angle changes to stroke or destroke a variable volume piston pump or motor (PPM). Similar to servo piston but including a mechanically linked spool arrangement to aid in servo oil control. Sales Engineering Support Team
Relief Valve
SAP Self-Pressure Reducing Valve Servo Piston Servo Valve SEST
SMD
Special Feature Request Structure, Function, Testing, Adjusting & Troubleshooting – which are the primary education elements provided at FST Service schools. Service Market Development
SMR
Service Meter Reading (hours of engine runtime)
SOD
SOMR
Service Operation Development An ON or OFF hydraulic valve. Usually found in the pilot circuit, providing electrical over hydraulic control of certain system features. Solenoids may be operated either by the controller computer control (2-stage relief; LS select), or by manual operation of an electrical switch (PPC Lock; Push Up Switch), or both (Swing Lock). Service Operation Monthly Report
SOS
Service Operation Study
SPA
Special Policy Adjustment
SPAR
Special Price Assistance Request
SPK
Sales Presentation Kit
SPPM
Service Policy and Procedure Manual Serious Quality Problem – a product issue reported via numerous ETSI for which countermeasures are being researched or designed.
SFR SFTAT
Solenoid Valve
SQP
TERM or ACRONYM
DEFINITION
SQP
Serious Quality Problem
SSL
Skid Steer Loader
STEP
Skill & Training Evaluation Program Device designed to relieve a small quantity (about 3%) of main oil during “neutral” while “dumping/unloading” LS circuit to zero or tank circuit. In operation, the LS circuit rise in pressure closes the unload valve to allow LS circuit and main circuits to build pressures. An angled sliding surface which dynamically causes piston pumps or motors (PPM) to stroke (flow more), or destroke (flow less). A multiple disc friction brake designed to “HOLD” the swing function (static, not dynamic), unless hydraulically released. Spring applied in the absence of release oil, which the controller timer stops at the release solenoid approximately 4 seconds after the swing PPC has been returned to neutral; thereby preventing any inadvertent swing brake application as the swing motion ceases. Pilot oil solenoid (ON/OFF) valve used by the controller computer every time swing pilot pressure closes the swing pressure switch, unless the Swing Lock switch is “ON” causing an interruption in the electrical “ON” signal from the controller (attempting to release the swing brake). (See Swing Brake Solenoid.) In the “UP” position, causes uninterrupted battery voltage to power the Swing Brake Release Solenoid. This will continuously release the swing brake (a potential hazard on a slope), unless the Swing Lock Switch is “ON” – interrupting this battery direct circuit. Technical Assistance Center
Sub Unload Valve
Swash Plate
Swing Brake
Swing Brake (Release) Solenoid Swing Lock Switch Swing Prolix (Bypass) Switch TAC
TMS
Training Administration Program Technical Information Product Support (KAIC Service Department Computer network) Track Management System
TPI
Technical Parts Inquiry
TPK
Technical Presentation Kit
TQI
TSI
Total Quality Initiative Device in parallel to travel motor main oil circuits (forward or reverse), to allow “shared” oil crossover to compensate for any slight travel oil variations, thus ensuring straight travel. Valve closes during steering commands so shared oil crossover does not hamper the steering results. Sends pilot oil to the travel motors’ regulator/servo control, changing the displacement to MINIMUM for medium and high speeds. In low speed solenoid is OFF. (See ETSI.)
TSR
Technical Service Request
TSS
Troubleshooting System Torque Variable Control valve. An electric/mechanical/hydraulic control valve used to limit pump stroke (flow) to keep within the available power setting of the engine. (Also see PC Valve.) (See both LS Relief and SubUnload Valve) An automatic warning to the operator or user deemed important enough to alert, due to risk of damage related to abnormalities sensed by the machine’s self diagnostics network. Vehicle Health Monitoring System. An on-board data collecting system from the vehicle controllers and additional sensors. It’s designed for large size equipment such as HD785/985, 930E, PC1800, PC4000, and WA1200
TAP TIPS
Travel Junction Valve Travel Speed Solenoid Valve
TVC Unload Valve User Code (Avance Excavators)
VHMS
TERM or ACRONYM WebCARE
DEFINITION A web-based global database for VHMS, Pm-Clinic and Oil Analysis (KOWA) data.
WL
A web-based medium for presenting training content or other information to multiple locations throughout the world. Wheel Loader
WPG
Warranty Procedure Guide
Webcast
