John Deere 70d Excavator Technical Service Repair Manual.pdf
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The 70D excavator has a 4-cycle diesel engine producing 41 kW (55 hp) at 2200 rpm. It uses an open center hydraulic system with two variable displacement pumps producing a maximum combined flow of 189.2 L/min. The excavator weighs approximately 80 kg (175 lb) including the operator and has standard equipment. It can operate effectively in temperatures from -18 to 43属C.
John Deere 70d Excavator Technical Service Repair Manual.pdf
- 2. 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 eafety messages in the introduction of this manual and the cautions presented throughout the text of the manual. 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 diagnostics. Repair sections tell how to repair the components. Diagnostic 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. Binders, binder labels, and tab sets can be ordered by John Deere dealers direct from the John Deere Distribution Service Center. This manual is part of a total product support program. FOS MANUAL REFERENCE TECHNICAL MANUALSMACHINE SERVICE COMPONENT MANUALSCOMPONENT SERVICE Fundamentals of Serv.se (FOS) Manuals cover basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes. FOS Manuals are for training new personnel and for reference by experienced technicians. Technical Manuals are concise guides for specific machines. Technical manuals are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair. Component Technical fdanuals are concise service guides for specific components. Component technical manuals are written as stand-alone manuals covering multiple machine applications. Introduction
- 4. JOHN DEERE DEALERS IMPORTANT: Please remove this page and route through your service department. This is a complete revision for TM1408, 70D Excavator. Listed below is a brief explanation of WHAT" was changed and "WHY t W短tS Ghanged. This manual was revised: 1. To included additional information on disassembiy and assembly of track recoil spring using ST4e2o Track Recoil Spring Disassembly and Assembly Tool, and DFT1087 Track Recoil Spring Disassembly and Assembly Guard Tool. 2. To include miscellaneous changes and updates. X DCSO.M1408 -19-n 8cCTe9 Dealer Presentation Sheet
- 6. SECTION IGENERAL INFORMATON Group ISafety Group IIGeneral Specifications Group IIITorque Values Group IVFuels and Lubricants Group VInspection Procedures SECTION O1TRACKS Group 0130Track System SECTION 02AXLES AND SUSPENCION SYSTEM Group 0250Axle Shaft, Bearings, and Reduction Gears Group 0260Hydraulic System SECTION 04ENGINE Group 0400Removal and Installation SECTION 0 ENGINE AUXILIARY SYSTEMS Group 0505Cold Weather Starting Aids Group 051 Cooling System Group 0515Speed Controls Group 052 lntahe System Group 0530External Exhaust Systems Group 0560 External Fuel Supply Systems SECTION 07DAMPENER DRIVE (FLEX COUPLING) Group 0752Elements SECTION 16ELECTRICAL SYSTEM Group 1671Bakeries, Support, and Cables Group 1672Alternator, Regulator, and Charging System Wiring Group 167 Wiring Harness and Switches Group 1677Motors and Actuators SECTION 17FRAME or SUPPORTING STRUCTURE Group 1740Frame Installation Group 1749Chassis Weights SECTION 1 OPERATOR'S STATION Group 180 Removal and Installstion Group 1810Operator Enclosure Group 1821Seat Group 1830Heating and Air Conditioning SECTION 32-BULLDOZERS Group 3200Removal and Installation Group 3215Controls Linkage Group 326 Hydraulic System SECTION 3 EXCAVATOR Group 3302Buckets, Teeth, Shanks, and Sidecutters Group 334 Frames Group 3360Hydraulic System SECTION 43SWING OR PIVOTING SYSTEM Group 4311Brakes Group 4350Mechanical Drive Elements Group 4300Hydraulic System SECTION 9 DEALER FABRICATED TOOLS Group 9900OeaIer Fabricated Tools Afl information, illustrations and specifications in this manual are 6ased on the latest information available at the tlme of publication. The right is reserved to make cnangas at any time without notice. TM"408-19-1 4NOV89 C:OPYRIGHW 1989 DEERE & COMPANY Moline, Illinois Ali rignts reserved a John Deere ILLUSTRUCTION"属 Manual errious EQioons Gopy単ghP 18B7 UBem& %mpanY Contents
- 8. Section I GENERAL INFORMATION CONTENTS Page GROUP ISafety Safety GROUP IIGeneral Specifications 70D Specificati Drain and Refill Capacities Working Ranges Lift Capacityk GROUP IIITorque Values Cap Screw Torque alues Metric with Lett Service Recommendations O-Ring Boss F Fiat Face O-Ring Seai Fittings SAE Four Bolt Flang GROUP IVFuels and Lubricants fuel Specificatio Storag En Swing and Propel Gearbox Track Rollers and Idlers Grea Swing Bearing Grease Coolant Requirements 1-11-4 -I Cold Weather Operation.....................................I-IV-8 Alternative Lubricants Lubricant Storage GROUP VInspection Procedures Planned Inspection Program Using the Checkii Delivery Check I-IV-B I-IV-8 V-
- 9. I-2 Contents
- 10. PREPARE FOR EMERGENCIES Be prepared if a fire starts. Keep a first aid kit and fire extinguisher handy. Keep emergency numbers for doctors, ambulance service, hospital, and fire department near your telephone. DE3 F RE2 -1B-03MAR8B HANDLE FLUIDS SAFELYAVOID FIRES When you work around fuel, do not smoke or work near heaters or other fire hazards. Store flammable fluids away from fire hazards. Da not incinerate or puncture pressurized containers. Make sure machine is clean of trash, grease, and debris. Do not store oily rags; they can ignite and burn spontaneously. PREVENT BATTERY EXPLOSIONS Keep sparks, lighted matches, and open flame away from the top of battery. Battery gas can explode. Never check battery charge by placing a metal object across the posts. Use a volt-meter or hydrometer. Do not charge a frozen battery; it may explode. Warm battery to 16属C (60属F). O53,SPARKS -19-0 JA5I8B I-I-1 .. Group I Safety T zs1
- 11. PREVEMT ACID BURNS Sulfuric acid in battery electrolyte is poisonous. It is strong enough to burn skin, eat holes in clothing, and cause blindness if splashed into eyes. Avoid the hazard by: ng batteries in a well-ventilated area. 2. Wearing eye protection and rubber gloves. 3. Avoiding breathing fumes when electrolyte is added. 4. Avoiding spilling or dripping electrolyte. S. Use proper jump start procedure. If you spill acid on yourself: 1. Flush your skin with water. 2. Apply baking soda or lime to help neutralize the acid. 3. Flush your eyes with water for 1015 minutes. Get medical attention immediately. If acid is swallowed: 1. Drink laree amounts of water or milk. 2. Then drink milk of magnesia, beaten eggs, or vegetable oil. 3. Get medical attention immediately. O53,POI5ON Safety/5afety
- 12. O53,FLUO -19-01oECae PARK MACHINE SAFELY Before working on the machine: Lower all equipment to the ground. Stop the engine and remove the key. Disconnect the battery ground strap. Hang a "DO NOT OPERATE tag in operator station. AVOID HIGH-PRESSURE FLUIDS Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. IN an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of inJury may call the Deere & Company Medical Department in Moline, Illinois, or other knowledgeable medical source. 1-1-3 .
- 13. WEAR PROTECTIVE CLOTHING Wear close fitting clothing and safety equipment appropriate to the job. Prolonged exposure to loud noise can cause impairment or loss of hearing. 則 則 Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. SUPPORT MACHINE PROPERLY Always lower the attachment or implement to the ground before you work on the machine. If you must work on a lifted machine or attachment, securely support the machine or attachment. Do not support the machine on cinder blocks, hollow tiles, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack. Follow recommended procedures in this manual. OSS,LOWER -19-21DEC87 SERVICE MACHINES SAFELY Tie long hair behind your head. Do not wear a necktie, scarf, loose clothing, or necklace when you work near machine tools or moving parts. If these items were to get caught, severe injury could result. Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts. 053,LOOSE -19-21DECB7 1-1-4 ≒ Safety/Safefy
- 14. SERVICE EXCAVATOR SAFELY Never operate the machine if an unsafe condition exists. Attach a DO NOT OPERATE tag to the machine. Be sure you understand a service procedure before working on the machine. Never lubricate or work on the machine while it is moving. Always use two people when making checks with the engine runningthe operator at the controls, able to see the person doing the checking. Keep hands away from moving pans. Never work under a machine raised by the boom. If the machine must be raised, keep a 90110' angle between boom and arm. Support the machine in the raised position by placing blocks or jackstands under machine. Do not work under a raised bucket. Lower bucket to ground or onto blocks. Disconnect battery ground cable () before welding on the machine or making adjustments on the engine or electrical system. TX,02T,05,CB3 -19-1BMARBZ WORK IN VENTILATED AREA Engine exhaust fumes can cause sickness or death. If it is necessary to run an engine in an enclosed area, remove the exhaust fumes from the area with an exhausl pipe extension. If you do not have an exhaust pipe extension, open the doors and get outside air into the area. AIR 5afety/5afety
- 15. REPLAGE SAFE+Y sIGNS Replace missing or damaged safety signs. See the machine operator's manual for correct safety sign placement. UNDERSTAND CORRECT SERVICE Illuminate your work area adequately but safely. Use a portable safety light for working inside or under the machine. Make sure the bulb is enclosed by a wire cage. The hot filament of an accidentally broken bulb can ignite spilled fuel or oil. Catch draining fuel, oil, or other fluids in suitable containers. Do not use food or beverage containers that may mislead someone into drinking from them. Wipe up spills at once. OT3,LIGH+ -1.^-23FEB8B USE PROPER LIFTING EQUIPMENT Liftin9 heavy components incorrectly san cause severe injury or machine damage. Follow recommended procedure for removal and installation of components in the manual. 053.LIFT -19-05JANB8 1-1-6 損 Safety/Safely
- 16. WORK IN CLEAN AREA BeJore starting a job: Clean work area and machine. - Make sure you have all necessary tools to do your job. Have the right parts on hand. Read all instructions thoroughly; do not attempt shortcuts. O5s.CLEAN -191gJAN88 AVOID HARMFUL ASBESTOS DUST Avoid breathing dust that may be generated when handling components containing asbestos fibers. Inhaled asbestos fibers may cause lung cancer. Components in John Deere products that may contain asbestos fibers are brake pads, brake band and lining assemblies, clutch plates, and some gaskets. The asbestos used in these components is usually found in a resin or sealed in some way. Normal handling is not hazardous as long as airborne dust containing asbestos is not generated. Avoid creating dust. Never use compressed air for cleaning. Avoid brushing or grinding of asbestos containing materials. When servicing, wear an approved respirator. A special vacuum cleaner is recommended to clean asbestos. If not available, wet the asbestos containing materials with a mist of oil or water. Keep bystanders away from the area. 1-1-7 . Safety/Safefy USE TOOLS PROPERLY Use tools appropriate to the work. Makeshift tools, parts, and procedures wil! not make good repairs. Use pneumatic and electric lools only to loosen threaded parts and fasteners. Never use such tools to tighten fasteners, especially on light alloy parts. Use only replacement parts meeting John Deere specifications. O53,REPAJR -19-21DEC87 TS221 T86 42EJ
- 17. LIVE WITH SAFETY Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields. os9,LivE -1s-o3JANa8 DISPOSE OF FLUIDS PROPERLY Improperly disposing of fluids can harm the environment and ecology. Before draining any fluids, find out the proper way to dispose of waste from your local environmental agency. = Avoid pouring oil into the ground, down a drain, or into a stream, pond, or lake. Observe relevant environmental protection regulations when disposing of oil, fuel, coolant, brake fluid, filters, batteries, and other harmful waste. 1-1-8 Safety/Safety
- 18. 7OD SPECIFICATIONS 80 kg (175 lb) operator, and standard I-II-1 .. General Specifications
- 19. Engine: John Deere 4-239D Type . . ..... . ... .. ......................... ... .. ...... ... 4 cycle diesel Maximum net torque @ 1200 rpm ................................ 214 N'm (21.8 kg-m) (158 lb-ft) Lubrication .. ......................................... Pressure system with full-flow filter Cooling fan....................................................................................................................................................... Suction Air cleaner ............ ....... , ............ ........................... . ...................Dry Electrical system ............... ........ ,.............................................................24 volt with alternator Batteries .. .. ..... ....... . ............................. Reserve capacity: 123 minutes Power @ 2200 engine rpm Net . ...... .. . .. . SAE 41 kW (55 hp) Hydraulic System: Open center. Two variable-displacement axial-piston pumps and one control valves (5 and 4 spool sections) provide independent and combined operation of all functions. The 5-spool control valve section has one spool for optional offset boom or an auxiliary attachment. M 2 V t 贈i m nes e wing ' ' ' ' ' * ' ' ' ' ' ' 1 580 Pa' (2 6 bar) ( ' psi) Maximum oil flow .. . .. : : : . : : ' : : . . .' .. .: : .. : .: : : . .: : .. . 2 x 94.6 L/min (2 x 25 gpm) Blade PumpIf Equipped ............... .................... .............. One gear type Pressure setting . . . .... .... .. . ...... . .. 17 650 kPa(1B0 bar)(2560 psi) Maximum oil flow . .. .............................. .... ... 23.5 L/min (6.2 gpm) Pilot pump . ... .. . ... ................................................................................................................1 gear type Pressure setting ........ ....................................... 3930 kPa (39 bar)(570 psi) Maximum oil flow ................................. . . . .... .... 23.5 L/min (6.2 gpm) System operating pressure 21 580 kPa (216 bar)(3130 psi) Relief settings Boom raise ... .. ... . . ....................... 24 480 kPa (245 bar)(3550 psi) Boom lower, arm and bucket....................................................................................23 030 kPa (230 bar)(3340 psi) Swing .................................................. 21 580 hPa (216 bar)(3130 psi) Travel ..................... ....... ...................... 23 030 kPa (230 bar)(3340 psi) Oil filtration: One suction filter One 10-micron full-flow return filter with bypass One 10-micron spin-on pilot filter with bypass TX,05T.115.J27 -1.^O9JU LOW 1-11-2 損 General Specifications/70D Specifications Bore and stroke .. Number of cylinders Displacement . .. Compression ratio . .. . .. .. . . . . . ... . .... ... .. .. 106.5 x 110 mm (4.19 x 4.83 in.) ..............................................................................................................................................4 .. . . ... .. ... .. .. .. . ..... . .. . ..... 3.9 L (239 cu in.) ........... ....... .., .................... ....................17.8:1
- 20. DRAIN AhID REFILL CAPACITIES Metric U.S. Fuel tank .......................... 130.0 L ..... ... .. .... .... .......34.3 gal Cooling system . .. ....... ........ 12.1 L ........... ........... Engine oil and filter ... .. . ......... 8.5 L . .... . .. . Hydraulic reservoir .................... 50.0 L .................. ...... 12.7 qt . .. 9.0 qt .......... 13.2 gal Swing gear ......................... 5.0 kg......................................................................11.0 lb Swing gearbox .. .......... .......... 2.3 L ........................................................................ 2.4 qt Propel gearbox (each) ..... ........... 2.5 L .. ... ...................................... 2.6 qt General Speciflcations/Drain and Refill Capacities
- 21. WORKING RANGES Standard Boom Offset Boom 1.62 m (5 ft 4 in.) Arm 2.2 m (6 ft 11 in.) Arm No Offset Max. Offset AMaximum digging reach 6.29 m 6.77 m 6.21 m 5.75 m (20 ft 8 in.) (22 ft 3 in.) (20 ft 5 in.) (18 ft 10 in.) A1 Maximum digging reach 6.14 m 6.63 m 6.06 m 5.60 m (On ground) (20 ft 2 in.) (21 ft 9 in.) (19 ft 11 in.) (18 ft 4 in.) BMaximum digging depth 4.10 m 4.60 m 4.10 m 3.65 m ** (13 ft 5 in.) (15 ft 1 in.) (13 ft 5 in.) (12 ft 0 in.) B'Maximum digging depth 3.75 m 4.31 m 3.7 m 3.25 m 2.44 m (8 ft) level (12 ft 4 in.) (14 ft 2 in.) (12 ft 2 in.) (10 ft 8 in.) Maximum cutting height 6.63 m 6.97 m d.45 m 6.14 m (21 ft 9 in.) (22 ft 10 in.) (21 ft 2 in.) (20 ft 2 in.) DMaximum dumping height 4.62 m 4.94 m 4.48 m 4.18 m (15 ft 2 in.) (16 ft 2 in.) (14 ft 8 in.) (13 ft 9 in.) EMinimum swing radius 1,98 m (6 ft 6 in.) 2.18 m (7 ft 2 in.) 2.43 m (8 ft 0 in.) 2.45 m (8 ft 0 in.) FMaximum vertical wall 5.49 m (11 ft 5 in.) 4.05 m (13 ft 3 in.) Maximum cut outside of track with 450 mm (18 in.) shoes and 0.24 m^ 400 mm left (15.7 in.) (0.31 yd*) bucket 400 mm right (15.7 in.) Maximum boom outset: I.!5 m (S It 9 in.1 Maxiinum digging depth will be less in applications where oflsei boam interferes with edpe of trench. I-11-4 +X,05T 11s J贈5 -19-D7JL'L87 General Specificaiions/Working Ranpes
- 23. LIFT CAPACITYKG (LB) Boom: Standard Arm: 1.62 m (5 ft 4 in.) Dozer Blade: No LIFTING OVER FRONT OR REAR Hydraulic limited capacity NOTE. iafinps af Liuckel lifl hook; machine equipped with so mm (1s in.) shoes, 0.単 m* (0,31 yd^) PCSA heaped bucket, and standard counterweight situated on firm, level, unifomt supporting surface. Lifting capecify daes not exceed 7E% of tipping load or 87% of full hydraulic capacity. TX,05T,11s,J29 -19-O7JULB7 Load Point Height Horizontal Distance From Centerline Of Rotation 1.52 (5) 3.05 (10) 4.57 (15) At Max. Radius 01 m (ft) 4.57 (15) 3.05 (10) 1170 (2570) 1170 (2570) 820 (1800) 5.79 (19.0) 1.52 (5) 2250 (4970) 1190 (2630) 730 (1600) 5.94 (19.5) Ground 2120 (4670) 1120 (2470) 770 (1700) 5.64 (1B.5) -1.52 (-5) 3070 (6770)* 2100 (4630) 1100 (2420) 1000 (2200) 4.88 (16.0) -3.05 (-10) 21g0 (477D) -4.57 (-15) LIFTING OVER THE SIDE m (ft) 1.52 (5) 3.05 (10) 4.57 (15) At Max. Radius Of m (ft) 4.57 (15) 3.05 (J0) 1170 (2570)* 1100 (2430) 680 (1500) 5.79 (19.0) 1.52 (5) 1950 (4300) 1030 (2280) 640 (1400) 5.94 (19.5) Ground 1800 (3960) 940 (2080) 680 (1500) 5.64 (18.5) -1.52 (-5) 3070 (6770) 1780 (3930) 950 (2090) 860 (1900) 4.88 (16.0) -3.05 (-10) 1840 (4060) -4.57 (-15) 1+1189 General Specifications/Lifi Capacitykg (lb)
- 24. LIFT CAPACITYKG (LB) Boom: Standard Arm: 1.62 m (5 ft 4 in.) Dozer Blade: Yes LIFTING OVER FRONT OR REAR Load Point Height Horizontal Distance From Centerline Of Rotation (損) 1.52 (5) 3.00 (10) 4.57 (15) At Max. Radius Of m (ft) 4.57 (15) 3.05 (10) 1170 (2570)* 1170 (2570)* 860 (1900) 5.79 (19.0) 1.52 (5) 2250 (4970)* 1250 (2760) T70 (1700) 5.94 {19.5) Ground 2220 (4900) 1180 (2610) 820 (1800) 5.64 (18.5) -1.52 (5) 3070 (6770)* 2200 (4860) 1160 (2560) 1090 (2400) 4.88 (16.0) -3.05 (-10) 2270 (5000) -4.57 (-15) LIFTING OVER THE SIDE m (ft) 1.52 (S} 4.57 (15) At Max Radius Of m (ft) 4.57 (15) 3.05 (10) 1170 (2570) 1170 (2570)* 730 (1600) 5.79 (19.0) 1.52 (5) 2080 (4580) 1110 (2440) 680 (1500) 5.94 (19.5) Ground 1920 (4240) 1040 (2300) 730 (1600) 5.64 (18.5) -1.52 (-5) 3070 (6770) 19D5 (4200) 1020 (2250) 95D {2100) 4.88 (16.0) -3.05 (-10) 1960 (4330) -4.57 (-15) 'Hydraulic limited capacity NOTE.- Ratings at bucket iift hook, machine equipped with 450 mm (JO in.) shoes, 0.24 (0.31 yet) PCfiA heaped bucket, and standard counterweight; situated on firm, level, uniform supporlinp surface. Liflinp capacity does not exceed 7'5 of tipping load or 87% of full hydraulic capacity.
- 25. LIFT CAPACITYKG (LB) Boom: Standard Arm: 2.12 m (6 ft 11 in.) Dozer Blade: No LIFTING OVER FRONT OR REAR Lead Point Height m ( ft) 1.52 (5) 3.05 (10) 4.57 (15) 6.10 (20) At Max. Radius of m (ft) 4.57 (15) 900 (1990) 860 (1900) 5.64 (18.5) 3.05 (10) 960 (2120)* 680 (1500) 6.25 (20.5) 1.52 (5) 1850 (4070)* 1220 (2680) 660 (1500) 6.40 (21.0) Ground 2150 (4730) 1130 (2500) 730 (1600) 6.10 (20.0) -1.52 (-5) 2690 (5920)* 2090 (4600) 1090 (2410) 820 (1800) 5.33 (17.5) -3.05 (-10) 4240 (9340) 2120 (4670) -4.57 (-15) LIFTiNG OVER THE SIDE m (ft) 1.52 (5) 3.05 (10) 4.S7 (15) 6.10 (20) At Max. Radius of 4.57 (15) 900 (1990) 770 (1700) 5.64 (18.5) 3.05 (10) 960 (2120) 590 (1300) 6.25 (20.5) 1.52 (5) 1850 (4070)* 1060 (2330) 540 (1200) 6.40 (21.0) Ground 1820 (4020) 980 (2160) 590 (1:3O0) 6.10 (20.O) -1.52 (-5) 2690 (5920)* 1770 (3900) 940 (2070) 730 (1600) 5.33 (17.5) -3.05 (-10) 4240 (9340)* 1800 (3970) -4.57 (-15) ' Hydraulic limited capacity NOTE.- Ratings at bucket lift haok, machine equipped with 450 mm (18 in.) shoes, 0.24 (0.31 yd*) PCSA heaped bucket, and standard cauntem'eighf; situated an fi'rm, level, uniform suppariiiig su/Yace. Lifting capacity does not exceed 75% af tipping laad or 87% of full hydraulic TX.DAT.1 15,J33 -19-07JUL87 General 5pecifications/Lift Capacitykg (lb)