Develon DX300LC-7 Crawler Excavator Shop Manual (950106-02120CE) (10001 and Up)
Out on pipe jobs, demo sites, or in the quarry, that DX300LC-7 is working hard in dust, mud, and cold starts. This shop manual’s what you’d use when you’re past quick fixes and need to tear in deep—swing motor off, final drives stripped, boom cylinders on the bench—and you want everything to go back on once, the right way. Say you’ve got a slow, noisy slew: you’ll trace the issue, pull the swing gearbox, inspect bearings and gear faces, then follow the manual’s torque sequence so you don’t preload anything and cook a fresh rebuild.
Applications & Use Cases
- Plan the teardown so you route hoses, harnesses, and lines cleanly, label everything, and don’t lose track of shims or spacers.
- Check wear limits and inspection points while the travel motors, finals, or cylinders are apart, so you don’t have to open it again next month.
- Verify torque patterns on major joints—carbody, boom foot, slew ring—so you tighten in the right order and keep things aligned.
- Isolate hydraulic problems by testing sections of the system in a logical sequence instead of just throwing parts at it.
- Bleed and align components on reassembly, then inspect for leaks, binding, or misrouted lines before you send it back to the job.
FAQ
Q: Is this something I can search on a laptop, or is it just a scanned book?
A: It’s typically a searchable PDF, so you can jump to systems or keywords instead of flipping pages all night.
Q: Can I print just the sections I need to bring to the machine?
A: Yeah, most folks print the relevant systems pages, stick ’em in plastic sleeves, and keep the full file on a tablet or laptop in the truck.
Safety Note
Always support the upperstructure and attachments with rated stands or blocking before you work under anything or pull major pins.
Develon DX300LC-7 CrawlerExcavator Index:
- DX300LC-7
- Table of Contents
- Safety, Specification and Systems Operation
- Safety
- Track Excavator Maintenance Safety
- Safety Instructions
- Safety Messages
- General
- Long Term Storage
- Maintenance
- Environment and Circumstances
- Specifications
- General Specifications
- Safety Instructions
- General
- Component Locations
- Overall Dimensions
- Standard Specification
- Performance Tests
- Preparation for Performance Tests
- Operational Performance Standard Table
- Operational Performance Test
- Engine Specifications
- Safety Instructions
- Engine Specification
- Engine Performance Curves
- Tightening Torques
- Hydraulic Systems and Structure Specifications
- Safety Instructions
- Hydraulic System
- Structure
- General Maintenance
- General Maintenance Instructions
- Safety Instructions
- Welding Precautions and Instructions
- Hydraulic System – General Precautions
- Maintenance Service and Repair Procedure
- Hydraulic System Cleanliness and Oil Leaks
- Cleaning and Inspection
- Standard Torques
- Safety Instructions
- Torque Values for Standard Metric Fasteners
- Torque Values for Standard U.S. Fasteners
- Type 8 Phosphate Coated Hardware
- Torque Values for Hose Clamps
- ORFS Swivel Nut Recommended Torque
- Torque Values for Split Flanges
- Torque Wrench Extension Tools
- Engine
- Engine
- Safety Instructions
- General Information
- Mechanical System
- Fuel System
- Lubricating System
- Cooling System
- Intake/Exhaust System
- Engine Control System
- After Treatment System
- Hydraulic System and Components
- Systems Operation, Description and Inspection
- Safety Instructions
- General
- Hydraulic Schematic
- Hydraulic Component and Oil Flow
- Safety Cutoff Valve Operation
- Power Up Valve Operation
- Travel High-speed Valve Operation
- Swing Brake Release Operation
- Travel Forward and Backward Operation
- Boom Up Operation
- Boom Down Operation
- Boom Floating and Boom Down for Breaker Operation
- Arm Dump Operation
- Arm Crowd Operation
- Bucket Dump Operation
- Bucket Crowd Operation
- Combined Bucket Crowd and Boom Up Operation
- Combined Travel and Boom, Arm, Bucket or Swing Operation
- Two Pump Operation
- Components Operation, Description and Inspection
- Safety Instructions
- Axial Piston Pump
- Regulator
- Pilot Gear Pump
- Drive Coupling
- Main Control Valve
- Swing Device
- Fan Pump
- Fan Motor
- Joystick Valve
- Travel Control Valve
- Solenoid Valve
- EPPR Valve (One or Two-way)
- Accumulator
- Gear Pump (Rotating)
- One Spool Valve (Rotating)
- Swing Bearing
- Center Joint
- Travel Device
- Track Assembly
- Electrical System
- Systems Operation and Description
- Safety Instructions
- General Schematics
- Power Supply
- Starting System
- Charging System
- AVM System
- Gauge Panel System
- EPOS system
- Removal and Installation
- Removal and Installation
- Engine
- Safety Instructions
- Governor Actuator
- V-Belt
- Alternator
- Starter Motor
- DEF (adblue®) Quality Sensor
- Sensors – After Treatment
- Sensors – Engine
- Engine Assembly
- Hydraulic Systems and Structure
- Safety Instructions
- Before Removing and Installing
- Main Pump
- Drive Coupling
- Undercovers
- Hydraulic Oil Tank
- Fuel Tank
- Swing Device
- Fan Pump
- Fan Motor
- Joystick Valve (Work Lever)
- Travel Control Valve
- Center Joint
- Travel Device
- Main Control Valve
- Cabin
- Air Condenser Filter
- Electric and Electronic
- Safety Instructions
- Before Removing and Installing
- Battery Assembly
- EPOS Controller
- TMS Controller
- AVM Controller
- Microphone Controller
- Smart Key Controller
- Wiper Controller
- DC-DC Controller
- Cabin Photo Sensor
- Cabin Switches
- Around View Monitor
- Display Monitor
- Hour Meter
- Wiper Motor
- Troubleshooting Guide
- Troubleshooting
- Wiring Harness Layout
- Safety Instructions
- Wiring Device
- Error Code
- Safety Instructions
- EPOS Error Code
- Engine Error Code
- Schematic
- Hydraulic Schematic
- Electrical Schematic
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