Caterpillar 325 325L Repair Manual — Wiring Diagrams

$39.95

Model: 325 | 325L
Type: Track-Type Excavator
Serial: 6KK00001-UP
4043 Pages·322 MB·Searchable PDF·English·Print-Ready
  • ✓ Wiring Diagrams
  • ✓ Hydraulic Schematics
  • ✓ Multi-Level Bookmarks (3-level navigation)

Same factory service manual used by authorized dealer technicians.

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Caterpillar 325 325L full color electrical system wiring schematic with wire circuit color legend, starter, alternator and relay panel wiring, SENR5409-01
Caterpillar 325 325L Repair Manual — Wiring Diagrams
$39.95

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This is the factory repair manual for the Caterpillar 325 and 325L excavators, the 3116 powered machines from Cat's mechanical/hydraulic era. It covers the engine from air cleaner to crankshaft, the full hydraulic system including the main pump regulator and swing control valve, plus swing drive, travel motors, final drives, undercarriage, boom/stick/bucket linkage, and the cab with its HVAC system. The schematics are in the book and both were checked page by page: the full colour electrical system schematic SENR5409-01 on page 3773, and the hydraulic schematic on pages 3848 and 3849, alongside A/C refrigerant troubleshooting. Electrical coverage includes the starting circuit, ELEC circuit code troubleshooting for the onboard monitor, and metric and SAE torque charts. Real numbers throughout, like the 6.2 kPa (25 inch H2O) maximum air inlet restriction spec you will actually use. One honest note about the bundle: about 17.5 percent of the 4043 pages is not repair work on this machine at all, but EquipmentManager dealer software and Product Link telematics documentation, so do not count every page as wrench material.

What's Inside This Caterpillar 325, 325L Repair Manual

SystemPagesKey Topics
Air Inlet and Exhaust System1-74Air Cleaner, Turbocharger, Aftercooler, Air Inlet Manifold, Exhaust Manifold, Exhaust Restriction
Basic Engine75-452Finding Top Center Position for No. 1 Piston, Gear Group (Front) - Time, Engine Crankcase Pressure (Blowby), Compression, Engine Valve Lash, Excessive Bearing Wear, Piston Ring Groove, Connecting Rod Bearings, Main Bearings, Cylinder Block, Flywheel, Flywheel Housing, Vibration Damper
Cooling System453-554Water Temperature Regulator, Water Pump, Engine Oil Cooler, Engine Oil Filter Base, Fan Drive, Fan, Engine Oil Cooler Bypass Valve, Water Temperature Regulator Housing, Water Pump Drive, Radiator
Electrical and Starting System (Systems Operation)555-639Electrical System, Fuel Shutoff Solenoid, Systems Operation, General Information, Component Description, Normal Operation, Disconnect Switch, Battery Circuit, Starting Motor Circuit
EquipmentManager (Dealer Diagnostic Software)640-1092EquipmentManager Dealer Administrator and User Guide (KENR6304-08, KENR6303-08) - NOT Machine Repair Content, Software Install/Configuration for Cat Dealer PCs
Electrical and Starting System (Troubleshooting, Interleaved with Product Link)1093-1665Interleaved, Not Sequential: ELEC Circuit-Code Troubleshooting e.g. PRV Circuit Shorted to Body Ground, Battery Voltage Cable of Swing Priority Solenoid Valve Circuit, Action Alarm Buzzer Circuit, Backup Switches and Starter Switch Diagnosis (~268p); Battery/Charging System/Electric Starting System Test, Starting Motor Solenoid Test, Pinion Clearance Adjust, Wiring Harness Open/Short Circuit Test, ECM Flash Program/Replace (~134p, Recurring Systems Operation/Testing and Adjusting Fragments); Product Link PL522/523 Telematics Troubleshooting, System Overview, Installation/Report Parameters Configure, Wireless Service Configure (~259p, NOT Machine Repair Content)
Engine Arrangement1666-1687General Information, Engine Speed, Engine Design, 4I1042, Solenoid Valve Group, Solenoid Valves, Engine
Frame and Body1688-1713Counterweight, Hood, Roller Mounting, Undercarriage Frame Assembly, Gear and Bearing Group, Swing Gear & Bearing
Fuel System1714-2451Dashpot (Types I, Iii, Iv, V, Vi, And VII), Dual Horsepower (Type VI), Dual Horsepower (Type VII), Fuel Ratio Control (Types I and IV), Fuel Ratio Control (Types V, Fuel Shutoff Solenoid, Fuel Transfer Pump, Governor Bias Spring (Most Types IV, And VI), Governor Bumper Spring (Some Type IV), Governor Limiting Circuit (Types I, Ii, And IV), Governor Limiting Circuit (Types V, Governor Speed Circuit, Governor Servo (Types I
Hydraulic System2452-3188Systems Operation, Hydraulic and Electronic Systems Checking Procedures, Hydraulic System Testing and Adjusting, Introduction, Boom, Stick, Bucket, Swing and Travel, Main Control Valve, Accumulator, Hydraulic Accumulator, Oil Cooler, Counterweight, Main Hydraulic Pump & Pump Drive Coupling, Boom Cylinder, Stick Cylinder, Bucket Cylinder
Implements3189-3333Systems Operation, Testing and Adjusting, Boom Cylinder, Boom Drift Reduction Valve, Boom Group, Boom, Bucket Linkage, Bucket Linkage Group, Stick Group, Stick
Lubrication System3334-3384Engine Crankcase Pressure (Blowby), Engine Oil Pressure, Excessive Engine Oil Consumption, Increased Engine Oil Temperature, Crankcase Breather, Oil Filler, Engine Oil Filter Base, Engine Oil Filter Bypass Valve, Engine Oil Cooler, Engine Oil Pump
Operator Station3385-3735General Information, Identifying the Refrigerant, Identifying the Air Conditioning System, Identifying the Heating System, Refrigerant Expansion Valve System, Refrigerant Orifice Tube System, Refrigerant Compressor, Refrigerant Condenser, Refrigerant Receiver-Dryer, Refrigerant Expansion Valve, In-Line Refrigerant Dryer, Refrigerant Orifice Tube Assembly, Evaporator Coil, Refrigerant Accumulator
Power Train3736-3771Travel Brake Valve, Final Drive, Duo-Cone Seals, Final Drive Sprockets, Final Drives
Schematics3772-3882Electrical System Wiring Schematic SENR5409-01 (P3773, Applicability Incl. 6KK1-Up), Hydraulic System Schematic SENR5407-01 (p3774-3775/3815-3840, Hydraulic Component-Location Diagram Front/Rear Pump Circuit (p3848-3849), Fluid Power Graphic Symbols Legend, Electrical Power Graphic Symbols Legend
Service Equipment and Supplies3883-3927Cab Pressurization and Filtration System, Manifold Gauge Set (Refrigerant), Heating and Air Conditioning Service Publications, Required Tools, Fuel Filter Base, Fuel Filter (Primary), Fuel Filter and Water Separator, Install, Air Cleaner, Engine Oil Filter Base, Fuel Filter, Fuel Priming Pump, Fuel Priming Pump & Primary Fuel Filter, Duo-Cone Seals
Torque Specifications3928-3975General Information, Metric (ISO) Fasteners, English (SAE) Fasteners, Ground Engaging Tool (G.E.T.) Fasteners, Installation of Fittings, Straight Thread O-Ring Fittings, Plugs, O-Ring Face Seal Fittings, Bulkhead Nuts, Flare Fittings, Air Conditioning Fittings, Air Brake Fittings, Tapered Pipe Thread Fittings, Miscellaneous Fittings
Undercarriage3976-4028Front Idler and Recoil Spring, Front Idlers & Recoil Springs, Front Idlers, Recoil Springs, Hydraulic Track Adjusters, Track Roller, Carrier Roller, Track Carrier Rollers, Track Rollers, Track Assemblies
Work Tools4029-4043Bucket Cylinder, Bucket Adjuster Group, Bucket, Cutting Edge Group, Sidecutter Group, Tip Adapter Group

Quick Reference Specifications

SpecificationValuePage
Maximum air inlet restriction6.2 kPa (25 inch of H2O)p. 13
Maximum back pressure (Standard Exhaust)6.7 kPa (27 inch of H2O)p. 16
Maximum back pressure (Water Cooled Exhaust)10 kPa (40 inch of H2O)p. 16
Aftercooler core water pressure240 kPa (35 psi)p. 26
Exhaust manifold mounting stud torque35 ± 5 N·m (26 ± 4 lb ft)p. 40
Disconnect switch resistance (closed position)less than 5 ohmsp. 1357
Water temperature regulator, begin to open / fully open78-83 degC (172-181 degF) / 94 degC (201 degF)p. 497
Travel motor relief valve pressure setting36800 ± 980 kPa (5250 ± 140 psi)p. 3737
BrandCaterpillar
Model325, 325L
Machine TypeTrack-Type Excavator
Manual TypeRepair Manual
LanguageEnglish
FormatSearchable PDF (Digital Download)
Pages4,043
File Size322 MB
Serial Range6KK00001-UP
Wiring DiagramsYes
Hydraulic SchematicsYes
Torque SpecificationsNo
Bookmarked / IndexedYes