New Holland LB115 Backhoe Loader In-Depth Service Manual (1998) – 731 Pages | OEM Specs

New Holland LB115 Backhoe Loader Service Manual - 1998 Edition

This official service publication provides the technical framework for maintaining and overhauling the New Holland LB115. It integrates a specific hyper-specific maintenance requirement: when installing the extendible dipperstick wear pads, technicians must apply LOCTITE Threadlocker 242 to the retaining bolts and tighten to exactly 44.7 N·m (33 ft. lbs.) to prevent damaging the threaded inserts. Adherence to these precise torque and chemical locking specifications is critical for preventing structural play and ensuring maximum uptime during heavy-duty excavation tasks.

Machine Architecture & Technical Applicability

The document covers the following machine configurations and series designations:

LB Series Technical Range

• LB115 Base Model: Chassis configurations equipped with 4WD and 4x4 Power Shift transmissions.
• Serial Number Range: Applicability starts from Unit Serial Number 031005017 and includes specific electrical updates for machines from Serial Number 031012972.

Powertrain & System Variants

• Engine Series: New Holland 450T/PD Turbocharged 4-cylinder diesel units.
• Transmission Systems: Clark-Hurth-T16000 Power Shift (4 Forward / 2 Reverse gears).
• Steering Configurations: 2-Wheel Steer, All-Wheel Steer (AWS), and Crab Steer systems.
• Regional Market Specs: Dedicated system layouts for North America and Rest of World (All models except N.A.).

Operational Efficiency & Safety Proof Points

• System Calibration: Access factory-mandated hydraulic relief pressures (210 bar/3040 PSI) and steering standby pressures (7-9 bar) to maintain peak breakout force.
• Precision Assembly: Utilize comprehensive hardware torque charts (Metric and Inch) to prevent fastener fatigue and structural failure in high-stress loader/backhoe pivot points.
• Electronic Diagnostics: Integrated wiring schematics and fuse/relay identification (F1/A to F8/C) facilitate rapid fault isolation in the electronic steering and transmission controllers.
• Safety Compliance: Adherence to "Danger" and "Warning" protocols ensures workshop personnel avoid hazards related to high-pressure hydraulic injection and pressurized cooling systems.

Documentation Metadata

• Manufacturer: New Holland
• Machine Type: Backhoe Loader
• Document Part No: Not explicitly stated (Section 1-1 to 7-86)
• Total Pagination: 731 Pages
• Language: US English

System Architecture & Factory Benchmarks

The LB115 utilizes a high-output powertrain designed for industrial excavation:

• Engine Output: 108 hp (80.5 kW) @ 2100 Rated RPM.
• Transmission Stall Speed: 2140 – 2240 RPM.
• Hydraulic System Type: Load Sensing Flow Sharing (L.S.F.S.) with tandem gear pump.
• Main System Relief: 210 bar (3043 PSI).
• Steering Priority Flow: 68 Liters/min (18.0 gpm) @ 175 bar.

Visual Navigation & Schematic Assets

Detailed internal diagrams support complex diagnostic and repair workflows:

• Hydraulic Schematics: Flow sharing diagrams (Pages 7-14 to 7-18) illustrating neutral, single, and multi-circuit operations.
• Transmission Power Flows: 1st through 4th speed forward/reverse clutch engagement paths.
• Electrical Foldouts: Regional specific wiring for North American and Global models from SN 031012972.
• Component Breakdowns: Exploded views of the Carraro 26.25 front axle and Clark-Hurth transmission.

Technical Table of Contents

• Section 1: Engine and Fuel System (Specifications, Overhaul, Turbocharger, Cooling)
• Section 2: Electrical System (Fuses, Relays, Wiring Diagrams, Starting/Charging)
• Section 3: Transmission (Powershift Hydraulics, Control Valves, Overhaul)
• Section 4: Rear Axle and Brakes (Wet Multi-Disc Brakes, Hand Brake Adjustment)
• Section 5: Steering and Front Axle (Hydrostatic Steering Motor, 4WS Valve, Carraro Axle)
• Section 6: Cab and Frame (Air Conditioning R134a, Safety ROPS, Glass Installation)
• Section 7: Hydraulic Systems (L.S.F.S. Theory, Pump Overhaul, Control Valve Sections)

Operational Limits & Fluid Specifications

Maintain system integrity by utilizing factory-specified lubricants and capacities:

• Engine Oil: NH Super Premium 15W-40 (API CG-4/SH/SJ); 17 Liters with filter.
• Hydraulic Reservoir: NH 134D Hydraulic Oil; 106 Liters (28 Gals) Tank / 137 Liters Total.
• Transmission Fluid: Automatic Transmission Fluid (Ford Mercon / GM Dexron II); 18 Liters.
• Axle Housing: NH 134D; 6.5 Liters (Rear) / 11 Liters (Front Carraro).
• Tappet Clearance (Cold): Intake 0.36-0.46 mm; Exhaust 0.43-0.53 mm.
• Wheel Nut Torque: 800 N·m (590 ft. lb.) for front and rear assemblies.

FAQ

Does this manual cover the LB115 model with specific serial number updates? Yes, this manual provides comprehensive coverage for the New Holland LB115 Backhoe Loader. It includes critical technical updates for machines starting from Serial Number 031005017, as well as specific electrical system revisions for units manufactured after Serial Number 031012972.

What is the specific torque requirement for the extendible dipperstick wear pads? When performing maintenance on the extendible dipperstick, the upper wear pads must be secured using retaining bolts treated with LOCTITE Threadlocker 242. These bolts must be tightened to a precise torque of 44.7 N·m (33 ft. lbs.) to ensure the assembly remains secure without damaging the threaded inserts.

Does the manual include detailed schematics for the hydraulic system? The documentation features extensive coverage of the Load Sensing Flow Sharing (L.S.F.S.) hydraulic system. It details the operation of the tandem gear pump and provides specific flow sharing diagrams that illustrate oil distribution during neutral, single-circuit, and multi-circuit operations to assist in troubleshooting pressure issues.

Can I find diagnostic information for the steering and braking systems? The manual details the service procedures for the hydrostatic steering motor and the 4WS (Four Wheel Steering) valve. It also provides maintenance instructions for the rear axle wet multi-disc brakes and the hand brake adjustment, ensuring that all safety-critical mobility systems are maintained to factory standards.

What are the benefits of accessing this documentation for urgent field repairs? The digital nature of this manual allows for immediate navigation to high-priority sections, such as the electrical wiring diagrams and fuse/relay identification (F1/A to F8/C). Technicians can instantly print specific calibration data or torque sequences, such as the 800 N·m requirement for wheel nuts, ensuring that repairs are performed accurately and safely directly at the job site.