Caterpillar K15, K21, K25 Gasoline Engine Service Manual
252 pages · Publication 99789-85100
Added to your cart. View cart
What's inside
From the manual's own table of contents: 52 sections, 148 entries. See sample pages (PDF, 220 KB)
How to use this manual3 topics
- Description
- Definition of Terms
- Definition of Units
Precautions for safety and quality3 topics
- Safe Operation
- Correct Operation
- Precautions for Radio Equipment Installation
Precautions8 topics
- Precautions in Draining Engine Coolant
- Precautions for Disconnecting Fuel Piping
- Precautions for Removing and Disassembling
- Precautions for Inspection, Correction, and Replacement
- Precautions for Assembly and Installation
- Parts Requiring Angle Tightening
- Caution for Use of Power Tools
- Precautions for Liquid Ggasket Application
Tightening torque2 topics
- Standard Bolt Tightening Torque
- Engine Part Tightening Torque
Trouble diagnosis2 topics
- Engine Adjust
- Engine LPG Fuel System
Engine maintenance5 topics
- Specifications
- Tightening Torque
- Maintenance Schedule
- Oil and Grease, and Capacity
- On Board Inspection and Service
ENGINE INSPECTION AND ADJUSTMENT2 topics
- Engine Body Related
- Ignition and Fuel Systems
Special Service Tools For carburetor model2 topics
- Precautions for Draining Engine Coolant
- Precautions for Liquid Gasket Application
Removal and installation of engine3 topics
- Removal
- Installation
- Inspection
Engine service4 topics
- Engine Disassembly
- Inspection and Correction
- Engine Assembly
- General precautions for service operations
Preparation1 topic
- Special Service Tools
Basic inspection14 topics
- Inspection of Idle Speed, Ignition Timing, and Air-fuel Ratio
- Throttle Valve Closed Position Learning and Idle Air Volume Learning
- Accelerator Pedal Released Position Learning
- Fuel pressure inspection
- How to Proceed with Trouble Diagnosis
- Diagnosis Chart by Symptom
- Component Parts Location
- ECM Component
- Circuit Diagram
- ECM Terminal Layout
- ECM Input/Output Signal Specifications
- Self-Diagnosis Function (Without SST)
- SST Reference Value in Data Monitor
- Fail-Safe Function
Crankshaft position sensor (POS) system1 topic
- Component Parts Inspection
Mass air flow sensor system1 topic
- SST Data Monitor Display
Show all 52 sections
PCV gas recirculation device1 topic
- System Diagram
Fuel cut function1 topic
- Inspection Procedure
Removal and installation of ECM components16 topics
- Removal and Installation of ECM
- Removal and Installation of Crankshaft Position Sensor (POS)
- Removal and Installation of Camshaft Position Sensor (PHASE)
- Removal and Installation of Mass Air Flow Sensor
- Removal and Installation of Engine Coolant Temperature Sensor
- Removal and Installation of Heated Oxygen Sensor (with Heated Oxygen Sensor Heater)
- Removal and Installation of Throttle Position Sensor (Electric Throttle Control Actuator Assembly)
- Removal and Installation of Accelerator Pedal Position Sensor (Accelerator Pedal Assembly)
- Removal and Installation of Intake Air Temperature Sensor (with Mass Air Flow Sensor)
- Removal and Installation of Neutral Switch (M/T Model)
- Removal and Installation of Ignition Coil (with Power Transistor)
- Removal and Installation of Fuel Injector
- Removal and Installation of Fuel Pump
- Removal and Installation of Throttle Control Motor (Electric Throttle Control Actuator Assembly)
- Removal and Installation of LPG Injector Holder
- Removal and Installation of LPG Injector Drive Unit
SERVICE DATA AND SPECIFICATIONS (SDS)1 topic
- Standard, Repair Limit
Lubrication system5 topics
- Adjustment Value
- Oil Pressure
- Trouble Diagnosis
- Lubrication Schematic Diagram
- Oil Pump
Engine coolant system3 topics
- Cooling System Configuration
- Water Pump
- Thermostat
Unit layout2 topics
- Electronic Control System Specifications
- Carburetor Specifications
Disassembly and assembly of fuel system6 topics
- Removal and Installation of LPG Injector Drive Unit Connector
- Removal and Installation of Electronic Control Throttle Assembly
- Removal and Installation of Gasoline Fuel Injector (Electronic Controlled Gasoline and Combined Use)
- Injector Holder
- LPG Device Components (Specifications for LPG and Combined Use)
- Components Around Carburetor and Pneumatic Governor (Carburetor Specifications)
Vaporizer mechanism and operation2 topics
- Primary (Decompression) Room
- Secondary Valve Room
Distributor (Carburetor type)4 topics
- Structure
- Disassembly
- Assembly
- Inspection After Assembly
Starter motor3 topics
- Starter Motor Specifications
- Overhaul
- Assembly Inspection
Alternator1 topic
- Components of Alternator
Inside this manual
Real pages from this service manual (252 pages). Open the sample pages (PDF, 220 KB)
- Specifications, page 37: ENGINE MAINTENANCE
- Troubleshooting, page 139: RELATIONSHIPS BETWEEN MALFUNCTIONING SYMPTOMS
- Diagram, page 187: FUEL PUMP SYSTEM
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, 252 pages
Quantity one is the manual described above.
Fast free USA shipping
Ships in 1 business day.
60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
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).