New Holland D125C LT Service Manual
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New Holland D125C LT Service Manual

New Holland D125C LT Service Manual

Stage iiib crawler dozer
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SERVICE MANUAL
D125C
Stage IIIB
Crawler Dozer
PIN NDDC12500 and above; PIN NEDC12500 and above; PIN NFDC12500 and above
Part number 47907874
2
edition English
nd
October 2015
Replaces part number 47619935
© 2015 CNH Industrial America LLC. All Rights Reserved.

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  • Page 1 SERVICE MANUAL D125C Stage IIIB Crawler Dozer PIN NDDC12500 and above; PIN NEDC12500 and above; PIN NFDC12500 and above Part number 47907874 edition English October 2015 Replaces part number 47619935 © 2015 CNH Industrial America LLC. All Rights Reserved.
  • Page 2 SERVICE MANUAL D125C Long Track (LT) [NDDC12500 - ] , D125C Long Track (LT) [NEDC12500 - ] , D125C Long Track (LT) [NFDC12500 - ] , D125C Wide Track (WT) / Low Ground Pressure (LGP) [NDDC12500 - ] , D125C Wide Track (WT) / Low Ground Pressure (LGP) [NEDC12500 - ] , D125C Wide Track (WT) / Low Ground Pressure (LGP) [NFDC12500 - ] 47907874 06/10/2015...
  • Page 3 Link Product / Engine Product Market Product Engine D125C Long Track (LT) Europe F4HFE613F*A002 [NDDC12500 - ] D125C Long Track (LT) Europe F4HFE613F*A002 [NEDC12500 - ] D125C Long Track (LT) Europe F4HFE613F*A002 [NFDC12500 - ] D125C Wide Track (WT) / Europe F4HFE613F*A002 Low Ground Pressure (LGP)
  • Page 4 Contents INTRODUCTION Engine..................10 [10.001] Engine and crankcase ............. 10.1 [10.202] Air cleaners and lines .
  • Page 5 [48.134] Track tension units ..............48.3 [48.138] Track rollers .
  • Page 6 [90.150] Cab ................. 90.1 [90.160] Cab interior trim and panels.
  • Page 7 47907874 06/10/2015 Find manuals at https://best-manuals.com...
  • Page 8 INTRODUCTION 47907874 06/10/2015 Find manuals at https://best-manuals.com...

  • Page 9: Table Of Contents

    Contents INTRODUCTION Foreword - Important notice regarding equipment servicing (*) ....... . 3 Safety rules (*) .

  • Page 10: Foreword - Important Notice Regarding Equipment Servicing

    Specifications, descriptions, and illustrative material herein are as accurate as known at time of publication but are subject to change without notice. In case of questions, refer to your NEW HOLLAND CONSTRUCTION Sales and Service Networks. 47907874 06/10/2015...

  • Page 11: Safety Rules

    INTRODUCTION Safety rules D125C Personal safety This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible death or injury. Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special in- structions.

  • Page 12: Safety Rules - Ecology And The Environment

    NEW HOLLAND CONSTRUCTION strongly recommends that you return all used batteries to a NEW HOLLAND CONSTRUCTION dealer, who will dispose of the used batteries or recycle the used batteries properly. In some countries, this is a legal requirement.

  • Page 13: Safety Rules - Do Not Operate Tag

    INTRODUCTION Safety rules - Do not operate tag D125C WARNING Maintenance hazard! Before you start servicing the machine, attach a DO NOT OPERATE warning tag to the machine in a visible area. Failure to comply could result in death or serious injury. W0004A Attach a DO NOT OPERATE (TAG) to the machine in an area that is clearly visible whenever the machine is not operating properly and/or requires service.

  • Page 14: Safety Rules

    INTRODUCTION Safety rules D125C General safety rules Use caution when operating the machine on slopes. Raised equipment, full tanks and other loads will change the center of gravity of the machine. The machine can tip or roll over when near ditches and embankments or uneven surfaces.
  • Page 15 INTRODUCTION Before leaving the machine: 1. Park machine on a firm level surface. 2. Put all controls in neutral or park lock position. 3. Engage park brake. Use wheel chocks if required. 4. Lower all hydraulic equipment — Implements, header, etc. 5.
  • Page 16 INTRODUCTION Wheels and tires Make sure tires are correctly inflated. Do not exceed recommended load or pressure. Follow instructions in the manual for proper tire inflation. Tires are heavy. Handling tires without proper equipment could cause death or serious injury. Never weld on a wheel with a tire installed.
  • Page 17 INTRODUCTION At least once each day, remove debris accumulation around moving components such as bearings, pulleys, belts, gears, cleaning fan, etc. More frequent cleaning of your machine may be necessary depending on the operating environment and conditions. Inspect the electrical system for loose connections or frayed insulation. Repair or replace loose or damaged parts. Do not store oily rags or other flammable material on the machine.
  • Page 18 INTRODUCTION Operator presence system Your machine is equipped with an operator presence system to prevent the use of some features while the operator is not in the operator’s seat. The operator presence system should never be disconnected or bypassed. If the system is inoperable, the system must be repaired. Reflectors and warning lights Flashing amber warning lights must be used when operating on public roads.
  • Page 19 INTRODUCTION Air-conditioning system The air-conditioning system is under high pressure. Do not disconnect any lines. The release of high pressure can cause serious injury. The air-conditioning system contains gases that are harmful to the environment when released into the atmosphere. Do not attempt to service or repair the system.
  • Page 20 INTRODUCTION • Do not permit anyone to touch the machine until power has been shut off to the power lines. Electrical storm safety Do not operate machine during an electrical storm. If you are on the ground during an electrical storm, stay away from machinery and equipment. Seek shelter in a permanent, protected structure.
  • Page 21 INTRODUCTION Roll over and tip over • Travel speed should be such that complete control and machine stability is maintained at all times. Where possible, avoid operating near ditches, embankments and holes. Reduce speed when turning, crossing slopes, and on rough, slick, or muddy surfaces.

  • Page 22: Basic Instructions - Shop And Assembly

    Only genuine spare parts guarantee the same quality, duration, and safety as original parts, as they are the same parts that are assembled during standard production. Only CNH Original Parts or NEW HOLLAND CONSTRUCTION Original Parts can offer this guarantee.
  • Page 23 W0111A Special tools The special tools that NEW HOLLAND CONSTRUCTION suggests and illustrate in this manual have been specifically researched and designed for use with NEW HOLLAND CONSTRUCTION machines. The special tools are essential for reliable repair operations. The special tools are accurately built and rigorously tested to offer efficient and long- lasting operation.

  • Page 24: Torque - Minimum Tightening Torques For Normal Assembly

    INTRODUCTION Torque - Minimum tightening torques for normal assembly D125C Decimal hardware Grade 5 bolts, nuts and studs Size lb in/lb ft 1/4 in 12 - 15 Nm 108 - 132 lb in 5/16 in 23 - 28 Nm 204 - 252 lb in 3/8 in 48 - 57 Nm 420 - 504 lb in...
  • Page 25 INTRODUCTION Grade 10.9 bolts, nuts and studs Size lb in/lb ft 4 mm 4 - 5 Nm 36 - 48 lb in 5 mm 9 - 11 Nm 84 - 96 lb in 6 mm 15 - 18 Nm 132 - 156 lb in 8 mm 37 - 43 Nm 324 - 384 lb in...
  • Page 26 INTRODUCTION Size lb in/lb ft 5/8-11 in 190 - 203 Nm 140 - 150 lb ft O-ring face seal end O-ring boss end fitting or lock nut Nominal Tube outside diameter Thread size Nm lb in/lb ft Thread size Nm lb in/lb ft SAE dash size...

  • Page 27: Torque - Standard Torque Data For Hydraulics

    INTRODUCTION Torque - Standard torque data for hydraulics D125C Installation of adjustable fittings in straight thread O-ring bosses 1. Lubricate the O-ring by coating it with a light oil or petroleum. Install the O-ring in the groove adjacent to the metal backup washer which is assembled at the extreme end of the groove (4).
  • Page 28 INTRODUCTION Pipe thread fitting torque Thread size Torque (maximum) 1/8-27 13 N·m (10 lb ft) Before installing and tightening pipe fittings, clean the 1/4-18 16 N·m (12 lb ft) threads with a clean solvent or Loctite cleaner and apply 3/8-18 22 N·m (16 lb ft) sealant L ®...

  • Page 29: Torque - Special Torques

    INTRODUCTION Torque - Special torques D125C Ripper Component Torque Ripper mounting bolts 700 - 1260 Nm (515 - 925 lb ft) Ripper pin retaining and tube cover bolts 145 - 260 Nm (110 - 190 lb ft) Hydraulic Pump Component Torque Non PTO pump Cover bolts...
  • Page 30 INTRODUCTION Track Torque Component Master link bolts (Use L ® 242® on master link 340.0 - 380.0 N·m (250.8 - 280.3 lb ft) OCTITE bolts.) Standard link shoe bolts 381.0 - 435.0 N·m (281.0 - 320.8 lb ft) Final Drives Component Torque Drive Hub Rolling Torque...
  • Page 31 INTRODUCTION Starter Torque Component Mounting bolts 68 - 77 Nm (50 - 57 lb ft) Battery terminal nut 17.7 - 24.5 Nm (13 - 18 lb ft) Solenoid + screw 2.6 - 4.5 Nm (23 - 40 lb in) Multifunction valve Component Torque Brake valve...

  • Page 32: Maintenance Chart

    INTRODUCTION Maintenance chart D125C Change fluid Replace Cleaning Drain fluid Test Grease Check Maintenance action Page no. Daily inspection General General Every 10 hours Engine oil Engine coolant Hydraulic oil Grease points Bulldozer blade (optional) grease points Initial 20 hours Track shoe bolt torque Every 50 hours Fuel pre-filter - Drain condensation...
  • Page 33 INTRODUCTION Replace Change fluid Cleaning Drain fluid Grease Test Check Maintenance action Page no. As required Track tension Roll Over Protective Structure (ROPS) Cab air filter - Recirculation filter Selective Catalytic Reduction (SCR) system - Replace supply module filter Selective Catalytic Reduction System (SCR) tank filter Engine air filters Doors and windows Ripper shanks and teeth...

  • Page 34: Basic Instructions - Moving A Disabled Machine

    INTRODUCTION Basic instructions - Moving a disabled machine D125C WARNING Transport hazard! Make sure that the weight of a trailed vehicle that is not equipped with brakes NEVER EXCEEDS the weight of the machine that is towing the vehicle. Stopping distance increases with increasing speed as the weight of the towed load increases, especially on hills and slopes.
  • Page 35 INTRODUCTION 3. Change the Tow Mode from “Disabled” to “Enabled” by highlighting and pressing the enter switch. RAIL12DOZ0592AA RAIL12DOZ0823AA 4. Continue to follow the screen prompts. RAIL12DOZ0824AA 47907874 06/10/2015...
  • Page 36 INTRODUCTION 5. Read the procedure for releasing brakes later in this instruction. RAIL12DOZ0825AA 6. Press the enter switch to continue to the next screen. NOTICE: Do not tow the machine over 1.2 km/h (0.7 mph). RAIL12DOZ0826AA 7. Press the enter switch to continue to the next screen. NOTICE: Tow the machine the shortest possible distance.
  • Page 37 INTRODUCTION 8. The tow mode will be enabled. Wait for the next screen prompt before you tow the machine. RAIL12DOZ0829AA Bypass hydrostatic pumps You must open the pressure relief valves in order to bypass the hydrostatic pumps. There are two valves located on each hydrostatic pump.
  • Page 38 INTRODUCTION 11. Remove the relief valve plastic caps ( (5) to access the engagement screws (6). The plastic caps will be unusable after removal and should be replaced. RAIL12DOZ0644AA 12. Use an Allen wrench, and turn the engagement screw (6) counterclockwise two turns on each relief valve. RCIL10CWL116AAL Releasing the brakes NOTE: This machine is equipped with a spring applied hydraulically released parking brakes.
  • Page 39 INTRODUCTION 14. Disconnect the fittings (1) at the brake lines and cap the fittings. There are two brake lines. A Tee fitting will be required for the two lines in order to connect to the hand pump. If a T-fitting is not available, two pumps must be used.
  • Page 40 INTRODUCTION Returning the unit to service 1. Disconnect the hand pump from the brake lines. 2. Remove the plugs, and reconnect the lines (1) to the brake solenoid. RAPH12DOZ0094AA 3. Remove the vacuum pump and install the hydraulic reservoir breather. RAIL12DOZ0372AA 4.
  • Page 41 INTRODUCTION 5. Install new plastic caps on each relief valve. 6. Reinstall the floor access panel. RAIL12DOZ0644AA 7. On the multi-function display screen, select “Service” and press the enter switch. RAIL15DOZ0018AA 8. Scroll down, and highlight the “Tow Mode” selection and press the enter switch.
  • Page 42 INTRODUCTION 9. Change the Tow Mode from “Enabled” to “Disabled” by highlighting and pressing the enter switch. RAIL12DOZ0592AA 47907874 06/10/2015...

  • Page 43: Hydraulic Contamination

    INTRODUCTION Hydraulic contamination D125C Contamination in the hydraulic system is a major cause of the malfunction of hydraulic components. Contamination is any foreign material in the hydraulic oil. Contamination can enter the hydraulic system in several ways. (A) When you drain the oil or disconnect any line. (B) When you disassemble a component.

  • Page 44: Consumables Loctite® Product Chart

    INTRODUCTION Consumables Loctite® Product Chart D125C Bonding Adhesives Prod- Recom- Description Color Strength Fixture/Full mended Cure (Steel/ Steel) Time Primer or Activator Clear 9.8 - 17.2 MPa 2 min/24 hrs Typical applications include bonding dissimilar (1421 - materials such as metals, glass or ceramics and 2495 psi) where fast fixturing is required between close fitting parts.
  • Page 45 INTRODUCTION Surface Preparation Product Color Active (Steel/Steel) Description Time 7380 Yellow 6 hours Is designed to initiate the cure of Loctite toughened acrylic to light adhesives. amber 7471 Yellow 30 to 70 seconds Is used where increased cure speed of LOCTITE® anaerobic to light products is required.
  • Page 46 INTRODUCTION Retain, Cylindrical Assemblies Prod- Color Strength Fixture/Full Recom- Description Cure (Steel/ mended Steel) Time Primer or Activator Green 13.5 - 25.0 MPa 4 min/6 hrs 7471 or Is designed for the bonding of cylindrical fitting (1958 - 7469 parts, particularly where bond gaps can approach 3626 psi) 0.25 mm (0.01 in.) and where maximum strength at room temperature is required.
  • Page 47 INTRODUCTION RTV Sealants Product Color Strength Fixture/Full Description Cure (Steel/ Steel) Time Clear 1.5 MPa 5 min/24 hrs Is designed for superior bonding and sealing properties (218 psi) to most surfaces (not recommended for concrete). This product resists aging, weathering and thermal cycling without hardening, shrinking or cracking.
  • Page 48 INTRODUCTION Gasket Sealants Prod- Color Strength Fixture/Full Recom- Description Cure (Steel/ mended Steel) Time Primer or Activator none White 0.113 - 72 hrs Is a medium strength anaerobic sealant with 0.330 Nm (1 Teflon® for tapered pipe threads. The high - 3 lb in) lubricating properties of this compound prevent galling on pipe threads and fittings.
  • Page 49 INTRODUCTION Thread Locker and Sealing Prod- Color Strength Fixture/Full Recom- Description Cure (Steel/ mended Steel) Time Primer or Activator Green 10 - 40 Nm (90 20 min/4 hrs 7471 or Is designed for the locking and sealing of threaded - 355 lb in) 7469 fasteners.

  • Page 50: Conversion Factors

    INTRODUCTION Conversion factors D125C Metric to U.S. MULTIPLY TO OBTAIN square meter AREA: 10.763 91 square foot hectare 2.471 05 acre newton FORCE: 3.596 942 ounce force newton 2.224 809 pound force LENGTH: millimeter 0.039 370 inch meter 3.280 840 foot kilometer 0.621 371...
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