Komatsu PC300-7E0, PC300LC-7E0, PC350-7E0, PC350LC-7E0 Hydraulic Excavator Service Manual
966 pages · Publication SEN03537-03
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- Models
- PC300-7E0, PC300LC-7E0, PC350-7E0, PC350LC-7E0
- Serial coverage
- PC300-7E0 50001-50216, 55001 and up, PC300LC-7E0 50001-50216, 55001 and up, PC350-7E0 30001-30093, 55001 and up, PC350LC-7E0 30001-30093, 55001 and up
- Manual type
- Service Manual
- Pages
- 966
- Publication
- SEN03537-03
- Condition
- Brand new
What's inside
From the manual's own table of contents: 168 sections, 320 entries. See sample pages (PDF, 857 KB)
Composition of shop manual
Safety notice
How to read the shop manual
Explanation of terms for maintenance standard
Handling of electric equipment and hydraulic component
Handling of connectors newly used for engines
How to read electric wire code
Precautions when carrying out operation
Method of disassembling and connecting push-pull type coupler
Standard tightening torque table
Conversion table
Specification dimension drawings
Specifications
Weight table
Table of fuel, coolant and lubricants
Engine related parts
Radiator, oil cooler and aftercooler
Power train
Final drive
Sprocket
Swing machinery
Swing circle
Track frame and recoil spring
Idler
Show all 168 sections
Carrier roller
Track roller
Track shoe
Hydraulic equipment layout drawing
Hydraulic tank and filter
Hydraulic pump
Control valve
CLSS
Functions and operation by valve
Merge-divider valve
Attachment circuit selector valve
Hydraulic drift prevention valve
Valve control
PPC valve
Solenoid valve47 topics
- PPC accumulator
- Return oil filter
- Center swivel joint
- Travel motor
- Swing motor
- Hydraulic cylinder
- Work equipment
- Dimensions of components
- Air conditioner piping
- Engine control
- Electronic control system
- Monitor system
- Sensor
- KOMTRAX system
- Standard value table for engine related parts
- Standard value table for chassis related parts
- Tools for testing, adjusting and troubleshooting
- Sketches of special tools
- Measuring engine speed
- Measuring air boost pressure
- Measuring exhaust gas color
- Adjusting valve clearance
- Measuring compression pressure
- Measuring blow-by pressure
- Measuring engine oil pressure
- Measuring fuel pressure
- Handling during cylinder cut-out operation
- Handling during no injection cranking operation
- Measuring fuel return rate and leakage
- Bleeding air from fuel circuit
- Checking fuel circuit for leakage
- Testing and adjusting air compressor belt tension
- Replacement of fan belt
- Replacement of alternator belt
- Measuring clearance in swing circle bearings
- Testing and adjusting track shoe tension
- Testing and adjusting oil pressure in work equipment, swing and travel circuit
- Testing and adjusting control circuit oil pressure
- Testing and adjusting pump PC control circuit oil pressure
- Testing and adjusting pump LS control circuit oil pressure
- Measuring solenoid valve output pressure
- Measuring PPC valve output pressure
- Adjusting play of work equipment and swing PPC valves
- Inspecting locations of hydraulic drift of work equipment
- Releasing remaining pressure in hydraulic circuit
- Measuring oil leakage amount
- Bleeding air from various parts
Special functions of machine monitor
Procedure for turning on KOMTRAX terminal
Indication by KOMTRAX terminal lamps
Handling voltage circuit of engine controller
Preparation work for troubleshooting of electrical system
Procedure for testing diodes
Pm clinic service
Failure codes table
Before carrying out troubleshooting when failure code is displayed
Points to remember when troubleshooting
Sequence of events in troubleshooting
Checks before troubleshooting
Classification and troubleshooting steps
Information in troubleshooting table
Connection table for connector pin numbers
T- branch box and T- branch adapter table
Failure code [AA10NX] Air cleaner Clogging
Failure code [AB00KE] Charge Voltage Low
Failure code [B@BAZG] Eng Oil Press. Low
Failure code [B@BAZK] Eng Oil Level Low
Failure code [B@BCNS] Eng. Water Overheat
Failure code [B@BCZK] Eng Water Level Low
Failure code [B@HANS] Hydr Oil Overheat
Failure code [CA111] EMC Critical Internal Failure
Failure code [CA115] Eng Ne and Bkup Speed Sens Error
Failure code [CA122] Chg Air Press Sensor High Error
Failure code [CA123] Chg Air Press Sensor Low Error
Failure code [CA131] Throttle Sensor High Error
Failure code [CA132] Throttle Sensor Low Error
Failure code [CA144] Coolant Temp Sens High Error
Failure code [CA145] Coolant Temp Sens Low Error
Failure code [CA153] Chg Air Temp Sensor High Error
Failure code [CA154] Chg Air Temp Sensor Low Error
Failure code [CA155] Chg Air Temp High Speed Derate
Failure code [CA187] Sens Supply 2 Volt Low Error
Failure code [CA221] Ambient Press Sens High Error
Failure code [CA222] Ambient Press Sens Low Error
Failure code [CA227] Sens Supply 2 Volt High Error
Failure code [CA234] Eng Overspeed
Failure code [CA238] Ne Speed Sens Supply Volt Error
Failure code [CA271] IMV/PCV1 Short Error
Failure code [CA272] IMV/PCV1 Open Error
Failure code [CA322] Inj #1 (L/B#1) Open/Short Error
Failure code [CA323] Inj #5 (L/B#5) Open/Short Error
Failure code [CA324] Inj #3 (L/B#3) Open/Short Error
Failure code [CA325] Inj #6 (L/B#6) Open/Short Error
Failure code [CA331] Inj #2 (L/B#2) Open/Short Error
Failure code [CA332] Inj #4 (L/B#4) Open/Short Error56 topics
- Failure code [CA342] Calibration Code Incompatibility
- Failure code [CA351] Injectors Drive Circuit Error
- Failure code [CA352] Sens Supply 1 Volt Low Error
- Failure code [CA386] Sens Supply 1 Volt High Error
- Failure code [CA428] Water in Fuel Sensor High Error
- Failure code [CA429] Water in Fuel Sensor Low Error
- Failure code [CA435] Eng. Oil Press Sw Error
- Failure code [CA441] Battery Voltage Low Error
- Failure code [CA442] Battery Voltage High Error
- Failure code [CA449] Rail Press Very High Error
- Failure code [CA451] Rail Press Sensor High Error
- Failure code [CA452] Rail Press Sensor Low Error
- Failure code [CA553] Rail Press High Error
- Failure code [CA559] Rail Press Low Error
- Failure code [CA689] Eng Ne Speed Sensor Error
- Failure code [CA731] Eng Bkup Speed Sens Phase Error
- Failure code [CA757] All Persistent Data Lost Error
- Failure code [CA778] Eng Bkup Speed Sensor Error
- Failure code [CA1633] KOMNET Datalink Timeout Error
- Failure code [CA2185] Throt Sens Sup Volt High Error
- Failure code [CA2186] Throt Sens Sup Volt Low Error
- Failure code [CA2249] Rail Press Very Low Error
- Failure code [CA2265] Fuel Feed Pump Open Error
- Failure code [CA2266] Fuel Feed Pump Short Error
- Failure code [CA2311] IMV Solenoid Error
- Failure code [CA2555] Grid Htr Relay Volt Low Error
- Failure code [CA2556] Grid Htr Relay Volt High Error
- Failure code [D110KB] Battery Relay Drive Short Circuit
- Failure code [D196KA] Service Return Relay Disc
- Failure code [D196KB] Service Return Relay S/C
- Failure code [DA25KP] Press. Sensor Power Abnormality
- Failure code [DA2RMC] Pump Comm. Abnormality
- Failure code [DA2SKQ] Model Selection Abnormality
- Failure code [DAFRMC] Monitor Comm. Abnormality
- Failure code [DHPAMA] F Pump Press Sensor Abnormality
- Failure code [DGH2KB] Hydr Oil Sensor Short Circuit
- Failure code [DHPBMA] R Pump Press Sensor Abnormality
- Failure code [DHS3MA] Arm Curl PPC Press Sensor Abnormality
- Failure code [DHS4MA] Bucket Curl PPC Press Sensor Abnormality
- Failure code [DW43KA] Travel Speed Sol. Open Circuit
- Failure code [DW43KB] Travel Speed Sol. Short Circuit
- Failure code [DW45KA] Swing Brake Sol. Open Circuit
- Failure code [DW45KB] Swing Brake Sol. Short Circuit
- Failure code [DW91KA] Travel Junction Sol. Open Circuit
- Failure code [DW91KB] Travel Junction Sol. Short Circuit
- Failure code [DWJ0KA] Merge-divider Sol. Open Circuit
- Failure code [DWJ0KB] Merge-divider Sol. Short Circuit
- Failure code [DWK0KA] 2-stage Relief Sol. Open Circuit
- Failure code [DWK0KB] 2-stage Relief Sol. Short Circuit
- Failure code [DXA0KA] PC-EPC Sol. Open Circuit
- Failure code [DXA0KB] PC-EPC Sol. Short Circuit
- Failure code [DXE0KA] LS-EPC Sol. Open Circuit
- Failure code [DXE0KB] LS-EPC Sol. Short Circuit
- Failure code [DXE4KA] Service Current EPC Open Circuit
- Failure code [DXE4KB] Service Current EPC Short Circuit
- Failure code [DY20KA] Wiper Working Abnormality
Failure code [DY20MA] Wiper Parking Abnormality
Failure code [DY2CKB] Washer Drive Short Circuit
Failure code [DY2DKB] Wiper Drive (Fwd) Short Circuit
Failure code [DY2EKB] Wiper Drive (Rev) Short Circuit
Before carrying out troubleshooting of electrical system
Information contained in troubleshooting table
Engine does not start
Auto-decelerator does not operate
Automatic warming-up system does not operate
Preheater does not operate
All work equipment, swing, and travel mechanism do not move
Power maximizing function does not operate
Machine monitor does not display at all
Machine monitor does not display some items
Contents of display by machine monitor are different from applicable machine
Fuel level monitor was lighted in red while engine running
Engine coolant temperature gauge does not indicate normally
Hydraulic oil temperature gauge does not indicate normally
Fuel level gauge does not indicate normally
Swing lock monitor does not indicate normally
When monitor switch is operated, monitor displays nothing
Windshield wiper and window washer do not operate
Machine push-up function does not operate normally
Monitoring function fails to display “boom raise” normally
Monitoring function fails to display “boom lower” normally
Monitoring function fails to display “arm IN” normally
Monitoring function fails to display “arm OUT” normally
Monitoring function fails to display “bucket CURL” normally
Monitoring function fails to display “bucket DUMP” normally
Monitoring function fails to display “swing” normally
Monitoring function fails to display “travel” normally
Monitoring function fails to display “travel differential pressure” normally
Monitoring function fails to display “service” normally
KOMTRAX system does not operate normally
Air conditioner does not operate
Travel alarm does not sound or does not stop sounding
Horn does not sound
System chart for hydraulic and mechanical system
All work equipment lack power, or travel and swing speeds are slow
Engine speed sharply drops or engine stalls
No work equipment, swing or travel move
Abnormal noise is heard from around hydraulic pump
Auto-decelerator does not work
Fine control mode does not function or responds slow
Boom moves slowly or lacks power
Arm moves slowly or lacks power
Bucket moves slowly or lacks power
Work equipment does not move in its single operation
Work equipment has a bit too fast hydraulic drift
Work equipment has big time lag
Other work equipment moves when relieving single circuit
Power max. switch does not operate
Machine push-up function does not operate
In compound operation, work equipment with larger load moves slowly
In swing + boom RAISE operation, boom moves slowly49 topics
- In swing + travel operation, travel speed drops sharply
- Machine swerves in travel
- Machine travels slowly
- Machine cannot be easily steered or lacks power
- Travel speed does not shift, or it is too slow or fast
- Track shoe does not turn (on one side only)
- Machine does not swing
- Swing acceleration is poor, or swing speed is slow
- Excessive overrun when stopping swing
- There is big shock when stopping swing
- Large sound is made when upper structure stops swinging
- Swing hydraulic drift is too big
- Method of using troubleshooting chart
- Starting performance is poor
- Engine does not start
- Engine does not pick up smoothly
- Engine stops during operations
- Engine does not rotate smoothly
- Engine lacks output (or lacks power)
- Exhaust smoke is black (incomplete combustion)
- Oil consumption is excessive (or exhaust smoke is blue)
- Oil becomes contaminated quickly
- Fuel consumption is excessive
- Oil is in coolant (or coolant spurts back or coolant level goes down)
- Oil pressure drops
- Oil level rises (Entry of coolant or fuel)
- Coolant temperature becomes too high (overheating)
- Abnormal noise is made
- Vibration is excessive
- How to read this manual
- Coating materials list
- Special tools list
- Removal and installation of fuel supply pump assembly
- Removal and installation of engine front seal
- Removal and installation of engine rear seal
- Removal and installation of cylinder head assembly
- Removal and installation of radiator assembly
- Removal and installation of hydraulic oil cooler assembly
- Removal and installation of aftercooler assembly
- Removal and installation of engine and hydraulic pump assembly
- Removal and installation of final drive assembly
- Disassembly and assembly of final drive assembly
- Removal and installation of swing motor and swing machinery assembly
- Disassembly and assembly of swing motor and swing machinery assembly
- Removal and installation of swing circle assembly
- Disassembly and assembly of carrier roller
- Disassembly and assembly of track roller assembly
- Disassembly and assembly of idler assembly
- Disassembly and assembly of recoil spring
Removal and installation of sprocket
Expansion and installation of track shoe assembly
Removal and installation of revolving frame assembly
Removal and installation of counterweight assembly
Removal and installation of center swivel joint assembly
Disassembly and assembly of center swivel joint assembly
Removal and installation of hydraulic tank assembly
Removal and installation of control valve assembly
Disassembly and assembly of control valve assembly
Removal and installation of hydraulic pump assembly
Removal and installation of oil seal in hydraulic pump input shaft
Disassembly and assembly of work equipment PPC valve assembly
Disassembly and assembly of travel PPC valve assembly
Disassembly and assembly of hydraulic cylinder assembly
Removal and installation of work equipment assembly
Removal and installation of operator's cab assembly
Removal and installation of operator’s cab glass (stuck glass)
Removal and installation of front window assembly
Removal and installation of assembly
Removal and installation of machine monitor
Removal and installation of pump controller
Removal and installation of KOMTRAX terminal
Removal and installation of engine controller
Hydraulic circuit diagram
Electrical circuit diagram
Connector list and stereogram
Inside this manual
Real pages from this service manual (966 pages). Open the sample pages (PDF, 857 KB)
- Troubleshooting, page 545: Failure code [CA234] Eng Overspeed
- Diagram, page 713: E-13 Fuel level gauge does not indicate normally
- Specifications, page 867: 50 Disassembly and assembly
- Foldout diagram, page 960: Electrical circuit diagram (1/4)
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
This manual: Service Manual SEN03537-03$99.69
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This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 966 pages
Quantity one is the manual described above.
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Ships in 1 business day.
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Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Other editions and similar models
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).