John Deere 250G LC Excavator Manual TM12177

250GLC Excavator Repair

REPAIR TECHNICAL MANUAL 250GLC (PIN: 1FF250GX_ _E608001-; 1FF250GX_ _D608001-;1FF250GX_ _C608001-) TM12177 06JAN16 (ENGLISH)

For complete service information also see: 250GLC Excavator Diagnostic

TM12171

JDLink (MTG) Technical Manual

TM114519

PowerTech Plus 4.5L and 6.8L Diesel Engines Level 14 Electronic Fuel System With Denso HPCR

CTM320

Super Caddy Oil Cleanup Procedure

CTM310

6068 PowerTech OEM Diesel Engines Above 130kW (174 hp) (Interim Tier 4/Stage III B platform)

CTM104719

PowerTech 4.5L & 6.8L Diesel Engines Tier 1/Stage I, Tier 2/Stage II, Tier 3/Stage IIIA, Tier 3/Stage IIA Tier 3/Stage III, (Base Engine)

CTM104

John Deere Construction and Forestry

250GLC Excavator Repair

(g) by Belgreen v2.1

Table of contents FOREWORD TECHNICAL INFORMATION FEEDBACK FORM Section 00 - GENERAL INFORMATION Group 0001 - Safety Group 0003 - Torque Values Section 01 - TRACKS Group 0130 - Track System Section 02 - AXLES, DIFFERENTIALS AND SUSPENSION SYSTEMS Group 0250 - Axle Shaft, Bearings, and Reduction Gears Group 0260 - Hydraulic System Section 04 - ENGINE Group 0400 - Removal and Installation Section 05 - ENGINE AUXILIARY SYSTEM Group 0510 - Cooling Systems Group 0520 - Intake System Group 0530 - External Exhaust System Group 0560 - External Fuel Supply Systems Section 07 - DAMPER DRIVE (FLEX COUPLING) Group 0752 - Elements Section 17 - FRAME OR SUPPORTING STRUCTURE Group 1740 - Frame Installation Group 1749 - Chassis Weights Section 18 - OPERATOR′S STATION Group 1800 - Removal and Installation Group 1810 - Operator Enclosure Group 1821 - Seat and Seat Belt Group 1830 - Heating and Air Conditioning Section 33 - EXCAVATOR Group 3302 - Buckets Group 3340 - Frames Group 3360 - Hydraulic System Section 43 - SWING OR PIVOTING SYSTEM Group 4350 - Mechanical Drive Elements Group 4360 - Hydraulic System Section 99 - DEALER FABRICATED TOOLS Group 9900 - Dealer Fabricated Tools

<- Go to Global Table of contents

250GLC Excavator Repair

<- Go to Global Table of contents

250GLC Excavator Repair

250GLC Excavator Repair

(g) by Belgreen v2.1

Foreword This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use.

Live with safety: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.

CAUTION: This is the safety-alert symbol. When you see this symbol on the machine or in this manual, be alert to the potential for personal injury.

Technical manuals are divided in two parts: repair and operation and tests. Repair sections tell how to repair the components.

Operation and tests sections help you identify the majority of routine failures quickly.

Information is organized in groups for the various components requiring service instruction. At the beginning of each group are summary listings of all applicable essential tools, service equipment and tools, other materials needed to do the job, service parts kits, specifications, wear tolerances, and torque values.

Technical Manuals are concise guides for specific machines. They are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair.

Fundamental service information is available from other sources covering basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes.

<- Go to Global Table of contents

250GLC Excavator Repair

GENERAL INFORMATION

(g) by Belgreen v2.0

Technical Information Feedback Form We need your help to continually improve our technical publications. Please copy this page and FAX or mail your comments, ideas and improvements.

Technical Manual Fax SEND TO:

John Deere Dubuque Works 18600 South John Deere Road Attn: Publications, Dept. 324 Dubuque, IA 52004-0538 USA

FAX NUMBER:

1-563-589-5800 (USA)

Publication Number:

Page Number:

Ideas, Comments:

Name:

Phone:

Email Address:

THANK YOU!

<- Go to Section TOC

Section 00 page 1

250GLC Excavator Repair

250GLC Excavator Repair

(g) by Belgreen v2.1

Section 00 - GENERAL INFORMATION Table of contents Group 0001 - Safety ................................................................................................................................. 1 Recognize Safety Information ............................................................................................................... 1 Follow Safety Instructions ..................................................................................................................... 1 Operate Only If Qualified ...................................................................................................................... 2 Wear Protective Equipment .................................................................................................................. 3 Avoid Unauthorized Machine Modifications .......................................................................................... 4 Add Cab Guarding For Special Uses ..................................................................................................... 4 Inspect Machine ................................................................................................................................... 5 Stay Clear of Moving Parts ................................................................................................................... 5 Avoid High-Pressure Fluids ................................................................................................................... 6 Avoid High-Pressure Oils ...................................................................................................................... 6 Work In Ventilated Area ........................................................................................................................ 7 Prevent Fires ........................................................................................................................................ 8 Prevent Battery Explosions ................................................................................................................... 8 Handle Chemical Products Safely ......................................................................................................... 9 Decommissioning: Proper Recycling and Disposal of Fluids and Components ................................... 10 Exhaust Filter Ash Handling and Disposal .......................................................................................... 10 Prepare for Emergencies .................................................................................................................... 10 Clean Debris from Machine ................................................................................................................ 11 Use Steps and Handholds Correctly ................................................................................................... 11 Start Only From Operator′s Seat ......................................................................................................... 12 Use and Maintain Seat Belt ................................................................................................................ 12 Prevent Unintended Machine Movement ............................................................................................ 13 Avoid Work Site Hazards .................................................................................................................... 14 Keep Riders Off Machine .................................................................................................................... 15 Avoid Backover Accidents .................................................................................................................. 15 Inspect and Maintain ROPS ................................................................................................................. 15 Avoid Machine Tip Over ...................................................................................................................... 16 Use Special Care When Lifting Objects ............................................................................................... 17 Add and Operate Attachments Safely ................................................................................................ 18 Park and Prepare for Service Safely ................................................................................................... 18 Service Cooling System Safely ........................................................................................................... 19 Remove Paint Before Welding or Heating ........................................................................................... 19 Make Welding Repairs Safely ............................................................................................................. 20 Drive Metal Pins Safely ....................................................................................................................... 21 Clean Exhaust Filter Safely ................................................................................................................. 22 Group 0003 - Torque Values ................................................................................................................. 24 Metric Bolt and Cap Screw Torque Values .......................................................................................... 24 Additional Metric Cap Screw Torque Values ....................................................................................... 25 Unified Inch Bolt and Cap Screw Torque Values ................................................................................. 27 Service Recommendations for 37° Flare and 30° Cone Seat Connectors ........................................... 28 Service Recommendations for O-Ring Boss Fittings ........................................................................... 29 Service Recommendations For Flared Connections—Straight or Tapered Threads ............................ 31 Service Recommendations For Flat Face O-Ring Seal Fittings ............................................................ 33 O-Ring Boss Fittings In Aluminum Housing Service Recommendations—Excavators ......................... 34 O-Ring Face Seal Fittings With SAE Inch Hex Nut And Stud End For High Pressure Service Recommendations ....................................................................................................................... 36 O-Ring Face Seal Fittings With Metric Hex Nut And Stud End For Standard Pressure Service Recommendations ....................................................................................................................... 38 O-Ring Face Seal Fittings With Metric Hex Nut And Stud End For High Pressure Service <- Go to Global Table of contents

250GLC Excavator Repair

250GLC Excavator Repair

(g) by Belgreen v2.1

Recommendations ....................................................................................................................... 40 Service Recommendations for Metric Series Four Bolt Flange Fitting ................................................. 42 Service Recommendations For Inch Series Four Bolt Flange Fittings ................................................. 43 Inch Series Four Bolt Flange Fitting For High Pressure Service Recommendations ............................ 44 Service Recommendations For Non-Restricted Banjo (Adjustable) Fittings ........................................ 46 Service Recommendations For O-Ring Boss Fittings With Shoulder ................................................... 48 Metric 24° O-Ring Seal DIN 20078 Service Recommendations ........................................................... 51

<- Go to Global Table of contents

250GLC Excavator Repair

Section 00 - GENERAL INFORMATION

Group 0001: Safety

Group 0001 - Safety Recognize Safety Information

Safety alert Symbols

Safety Alert Symbols This is the safety alert symbol. When you see this symbol on your machine or in this manual, be alert for the potential of personal injury.

Follow the precautions and safe operating practices highlighted by this symbol.

A signal word — DANGER, WARNING, or CAUTION — is used with the safety alert symbol. DANGER identifies the most serious hazards.

On your machine, DANGER signs are red in color, WARNING signs are orange, and CAUTION signs are yellow. DANGER and WARNING signs are located near specific hazards. General precautions are on CAUTION labels.

Follow Safety Instructions

Safety Messages <- Go to Section TOC

Section 00 page 1

250GLC Excavator Repair

Section 00 - GENERAL INFORMATION

Group 0001: Safety

Carefully read all safety messages in this manual and on your machine safety signs. Keep safety signs in good condition.

Replace missing or damaged safety signs. Use this operator’s manual for correct safety sign placement. Be sure new equipment components and repair parts include the current safety signs. Replacement safety signs are available from your John Deere dealer.

There can be additional safety information contained on parts and components sourced from suppliers that is not reproduced in this operator′s manual.

Learn how to operate the machine and how to use controls properly. Do not let anyone operate without instruction.

Keep your machine in proper working condition. Unauthorized modifications to the machine may impair the function and/or safety and affect machine life.

If you do not understand any part of this manual and need assistance, contact your John Deere dealer.

Operate Only If Qualified Do not operate this machine unless the operator′s manual has been read carefully, and you have been qualified by supervised training and instruction.

Operator should be familiar with the job site and surroundings before operating. Try all controls and machine functions with the machine in an open area before starting to work.

Know and observe all safety rules that may apply to every work situation and work site.

<- Go to Section TOC

Section 00 page 2

250GLC Excavator Repair

Section 00 - GENERAL INFORMATION

Group 0001: Safety

Wear Protective Equipment

Protective Clothing Guard against injury from flying pieces or metal or debris; wear goggles or safety glasses.

Wear close fitting clothing and safety equipment appropriate to the job.

Operating equipment safely requires the full attention of the operator. Do not wear radio or music headphones while operating machine.

Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear suitable hearing protection such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. Radio or music headphones are not suitable to use for hearing protection.

<- Go to Section TOC

Section 00 page 3

250GLC Excavator Repair