Caterpillar K21, K25 Gasoline Engine Service Manual
217 pages · Publication 99789-65120
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What's inside
From the manual's own table of contents: 118 topics. See sample pages (PDF, 239 KB)
- HOW TO USE THIS MANUAL
- Description
- Definition of Terms
- Definition of Units
- PRECAUTIONS FOR SAFETY AND QUALITY
- Reduction of Risk Operation
- Correct Operation
- Precautions for Radio Equipment Installation
- PRECAUTIONS
- Precautions in Draining Engine Coolant
- Precautions for Disconnecting Fuel Piping
- Disassembling
- Replacement
- Precautions for Assembly and Installation
- Parts Requiring Angle Tightening
- Caution for Use of Power Tools
- Precautions for Liquid Gasket Application
- TIGHTENING TORQUE
- Standard Bolt Tightening Torque
- Engine Part Tightening Torque
- SPECIAL SERVICE TOOLS
- ENGINE OUTSIDE DRAWINGS
- MAIN SPECIFICATIONS
- STANDARD AND REPAIR LIMIT
Show all 118 topics
- STAMPED LOCATION OF ENGINE NO
- TROUBLE DIAGNOSIS
- Engine Adjustment
- Engine LPG Fuel System
- ENGINE MAINTENANCE
- Specifications
- Maintenance Schedule
- Oil and Grease, and Capacity
- On Board Inspection and Service
- ENGINE INSPECTION AND ADJUSTMENT
- Engine Body Related
- Ignition and Fuel Systems
- Precautions for Draining Engine Coolant
- ADJUSTMENT VALUE
- ENGINE
- Removal
- Installation
- Inspection
- ENGINE SERVICE
- Engine Disassembly
- Inspection and Correction
- Engine Assembly
- of Engine
- Precaution
- PREPARATION
- Component Parts Location
- ECM Component
- Circuit Diagram
- ECM Terminal
- How to Proceed with Trouble Diagnosis
- Diagnosis Chart by Symptom
- Fail-Safe Function
- Table of DTC
- Service Tool
- (Without Service tool)
- ECM Input/Output Monitor
- ECM Active Test
- BASIC INSPECTION
- Ignition Timing
- and Idle Air Volume Learning
- Position Learning
- Fuel Pressure Inspection
- Fuel Pressure Release
- COMPONENT PARTS INSPECTION
- Crankshaft Position Sensor (POS)
- Camshaft Position Sensor (PHASE)
- Mass Air Flow Sensor
- Engine Coolant Temperature Sensor
- (Electric throttle control actuator assembly)
- (Accelerator work unit)
- (Joined with mass air flow sensor)
- Stop Lamp Switch
- Spark Plug
- Ignition Coil
- Injector
- Fuel Pump
- throttle control actuator assembly)
- Heated Oxygen Sensor
- LPG Injector
- LPG Assistance Injector
- PTC Heater (Integrated with vaporizer)
- PCV GAS RECIRCULATION DEVICE
- System Diagram
- ECM COMPONENTS
- Removal and Installation
- LUBRICATION SYSTEM
- Oil Pressure
- Lubrication Schematic Diagram
- Oil Pump
- ENGINE COOLANT SYSTEM
- Cooling System Configuration
- Water Pump
- Thermostat
- EMISSION CONTROL SYSTEM
- UNIT LAYOUT
- Electronic Control System Specifications
- LPG FUEL SYSTEM TROUBLE DIAGNOSIS
- SYSTEM
- Throttle Assembly
- Vaporizer Mechanism and Operation
- HOLDER
- LPG Fuel Injector
- LPG Assist Fuel Injector
- LPG Fuel Pressure Sensor
- Relief Valve (2 Relief Valves)
- VAPORIZER
- Inspection of Vaporizer
- STARTER MOTOR
- Starter Motor Specifications
- Overhaul
- Assembly Inspection
- ALTERNATOR
- Components of Alternator
- Disassembly
Inside this manual
Real pages from this service manual (217 pages). Open the sample pages (PDF, 238 KB)
- Specifications, page 35: ENGINE MAINTENANCE
- Troubleshooting, page 134: Diagnosis Chart by Symptom
- Diagram, page 167: Lubrication Schematic Diagram
This is a service manual
Here's how it compares to the other manual types.
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, 217 pages
Quantity one is the manual described above.
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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).