Caterpillar D30D Articulated Truck 3AJ Workshop Manual PDF

This PDF Workshop Service Manual for the Caterpillar D30D Articulated Truck 3AJ model was prepared as a complete guide for machine maintenance, repair, and correct operation. It is intended to help users understand service procedures, technical adjustments, and repair techniques needed to keep the truck running efficiently. The factory file provides a structured maintenance and diagnostic system that allows operators and technicians to quickly locate faults, identify unusual operating conditions, and fix problems before they result in costly downtime or serious damage.

Supported Model: D30D Articulated Truck 3AJ

Table of Contents:

Disassembly & Assembly
RENR1252 26SI Series Alternator.pdf
RENR2165 Comfort Series Seat For Caterpillar Machines.pdf
SENR2149 3306 Vehicular Engine for 966D Wheel Loader.pdf
SENR3581 37-MT, 41-MT, 42-MT Series Starting Motors.pdf
SENR4130 HDB Series & M1 Series Heavy Duty Brushless Alternators.pdf
SENR5598 3304B & 3306B Engines for CAT Built Machines.pdf
SENR5664 AC and Heating R134a.pdf
SENR6615 Contour Series Seat.pdf
SENR7508 30SI Series and 34SI Series Alternator.pdf
SENR8209 D25D D300D & D350D Articulated Dump Trucks Power Train.pdf
SENR8210 D25D D300D & D350D Articulated Dump Trucks Vehicle Systems.pdf
UENR3262 Seal Installation.pdf

General Service Information
SELD0080 Cylinder Packs, Con Rods & Piston Packs.pdf
SELD0083 Engines.pdf
SELD0179 3500 Engines and Short Blocks.pdf
SELD0188 3204 Long Blocks Reman Technical Supplement.pdf
SELD0189 3304 and 3306 Long Blocks.pdf
SELD0190 3406 and C-15 Long Blocks.pdf
SELD0191 3408 and 3412 Long Blocks.pdf
SELD0196 3116 Long Blocks.pdf
SELD0205 Selection Flowchart for Engines, etc.pdf
SELD0249 3208 Long Blocks.pdf
SELD0250 3126 and C7 Long Blocks.pdf
SELD0267 C-10 and C-12 Long Blocks.pdf
SELD0276 Short Blocks.pdf
SELD0301 3046 and 3066 Long Blocks.pdf
SENR0512 Service Welding Guide.pdf
SENR5668 Limited Slip Differential.pdf
SENR7510 Delco Remy Cranking Motors 30-MT 35-MT 40-MT 50-MT Series.pdf

Operation & Maintenance Manual
SEBU5596 Product Identification Numbers (PIN) Location Guide.pdf
SEBU6250 CAT Machine Fluids Recommendations.pdf
SEBU7373 Product Link 101.pdf
SEBU8257 European Union Physical Agents (Vibration) Directive.pdf
SEBU8647 D25D D300D & D350D Articulated Dump Trucks.pdf
SEBU9208 CAT Filters Recommendations.pdf

Safety
SENR7733 General Service and Repair Safety Info.pdf

Schematics
SENR3981 Fluid Power & Electrical Graphic Symbols.pdf
SENR8191 D25D D30D D350D  D40D & D400D Articulated Dump Trucks Hydraulic.pdf
SENR8192 Caterpillar D25D, D30D, D350D Articulated Dump Trucks Electrical System.pdf

Specifications
RENR1252 26SI Series Alternator.pdf
SENR4130 HDB Series & M1 Series Heavy Duty Brushless Alternators.pdf
SENR5664 AC and Heating R134a.pdf
SENR7508 30SI Series and 34SI Series Alternator.pdf
SENR8193 Articulated Trucks Steering.pdf
SENR8194 Articulated Trucks Suspension.pdf
SENR8195 D25D D300D & D350D Articulated Dump Trucks Air System & Brakes.pdf
SENR8205 Articulated Truck Power Train.pdf

System Operation
RENR1252 26SI Series Alternator.pdf
RENR2165 Comfort Series Seat For Caterpillar Machines.pdf
SENR4130 HDB Series & M1 Series Heavy Duty Brushless Alternators.pdf
SENR5664 AC and Heating R134a.pdf
SENR6615 Contour Series Seat.pdf
SENR7508 30SI Series and 34SI Series Alternator.pdf
SENR8193 Articulated Trucks Steering.pdf
SENR8194 Articulated Trucks Suspension.pdf
SENR8195 D25D D300D & D350D Articulated Dump Trucks Air System & Brakes.pdf
SENR8205 Articulated Truck Power Train.pdf
UENR4899 CAT Advanced Ride Management Seat Suspension.pdf

Systems Operation - Fundamentals
SEGV3008 Electrical System for All Caterpillar Products.pdf

Testing & Adjusting
RENR1252 26SI Series Alternator.pdf
RENR2165 Comfort Series Seat For Caterpillar Machines.pdf
SENR4130 HDB Series & M1 Series Heavy Duty Brushless Alternators.pdf
SENR5664 AC and Heating R134a.pdf
SENR6615 Contour Series Seat.pdf
SENR7508 30SI Series and 34SI Series Alternator.pdf
SENR8193 Articulated Trucks Steering.pdf
SENR8194 Articulated Trucks Suspension.pdf
SENR8195 D25D D300D & D350D Articulated Dump Trucks Air System & Brakes.pdf
SENR8205 Articulated Truck Power Train.pdf
UENR4899 CAT Advanced Ride Management Seat Suspension.pdf

Torque Specifications
SENR3130 Torque Specifications.pdf

Troubleshooting
SENR4130 HDB Series & M1 Series Heavy Duty Brushless Alternators.pdf
SENR5664 AC and Heating R134a.pdf
UENR4899 CAT Advanced Ride Management Seat Suspension.pdf

This electronic guide is based on real service and repair practices used in professional workshops. It focuses on practical solutions instead of theory, making it useful for regular inspections, preventive maintenance, and major repair operations. All included documents together create a complete service package for this machine. For safe and reliable operation, it is important to follow all service notes, warnings, and recommendations. The instructions are organized in a clear format, so both experienced specialists and beginners can easily work with the information.

Manual Features
File Type: PDF
Language: English
Works On: Windows, macOS, Linux, iOS, Android
This digital guide includes repair procedures, technical specifications, system operation explanations, wiring and hydraulic diagrams, troubleshooting steps, safety instructions, and a large number of illustrations. Additional materials cover schematic symbols, electrical layouts, and component location details.

FAQs
How do I download the manual?
Purchasing this PDF Workshop Manual is fast and straightforward. Click the “Buy Now” button and complete your payment. After checkout, you will receive an email with an instant download link. The file can be opened using Adobe Acrobat Reader, Foxit Reader, or any standard PDF software.

Is the manual printable?
Yes, the manual is completely printable. All pages can be saved, read, and printed whenever needed.

Need help?
If you have any questions about this manual, please contact us. We provide full after-sales support and will gladly assist you.