John Deere 320D Skid Steer Loader Parts Catalog
(PC10135)
John Deere 318d 320d Skid Steer Operation Test Manual
The John Deere catalog is systematically organized by major assemblies and their sub-components, following a standard “group-section-part” numbering scheme. It is an essential reference for part identification, major repairs, and understanding system architecture.
Major System Sections & Chapter Structure
The catalog is divided into Groups (10-series), each covering a primary system:
- Group 05 – Frame & Chassis: Includes main frame, loader tower, boom arms, tilt linkage, pins, bushings, and cab mounting components.
- Group 10 – Steering & Brakes: Covers the pilot-operated hydraulic steering system (steering cylinders, linkage), and the hydraulic-actuated wet disc brake system (brake valves, pistons, discs).
- Group 15 – Drivetrain (Power Train): Encompasses the hydrostatic transmission assembly, charge pump, drive chains, sprockets, axle assemblies, and final drive hubs.
- Group 20 – Hydraulic System: A comprehensive section including the main hydraulic pump, implement valve (control valve), auxiliary hydraulic kits, lift and tilt cylinders, hoses, tubes, and the hydraulic oil cooler.
- Group 25 – Operator Station (Cab): Contains the operator’s platform, cab structure, door assemblies, seat, seat bar, and all control linkages (joystick controllers, pedal assemblies).
- Group 30 – Electrical System: Details wiring harnesses, the main electrical module (fuse/relay panel), instrument cluster, sensors (pressure, temperature), switches, lighting, and the starting/charging system.
- Group 35 – Engine (John Deere Diesel): Provides a complete breakdown of the engine assembly and sub-assemblies: cylinder block, head, fuel system (injectors, pump), lubrication system (oil pump, cooler), cooling system (water pump, thermostat), air intake, and exhaust manifolds.
- Group 45 – Attachments & Coupler: Details the optional quick coupler assembly and related hydraulic connections for attachments.
John Deere 320D Skid Steer Loader Parts Catalog
Key Technical Data & Maintenance Charts (Typically Found in Introduction)
While primarily a parts list, introductory sections often include:
- Model & Serial Number Location: Critical for ensuring part number accuracy.
- General Specifications: Key data such as rated operating capacity, horsepower, operating weight, and hydraulic flow/pressure ratings.
- Fluid Capacities & Recommendations: Tables for engine oil, hydraulic oil, coolant, and drivetrain fluid types and volumes.
- Lubrication & Maintenance Interval Chart: A high-level schedule pointing to grease points, filter changes, and fluid service intervals (referencing the separate Technical Manual for procedures).
Troubleshooting & Diagnostic Outlines
The Parts Catalog does not contain diagnostic procedures. Its function is part identification. However, its structure directly supports troubleshooting by enabling users to locate parts within a malfunctioning system. For example, a hydraulic issue leads to Group 20, where subsections logically separate the pump, control valve, and cylinders.