1999 New Holland LS190 Skid Steer Loader - Essential Operator, Maintenance & Troubleshooting Guide

NEW HOLLAND LS190 Operator's Manual - 1999 Edition

This high-performance manual provides critical operational and maintenance protocols for the LS190 skid steer, featuring the heavy-duty 450/NC four-cylinder diesel engine. A vital requirement for maintaining system uptime includes the replacement of the factory-installed 10W-30 hydraulic oil with New Holland F200A fluid when operating in ambient temperatures consistently below 30°F to prevent component strain and ensure reliable cold-weather starting.

Technical Applicability & Model Configurations

The following configurations are documented based on integrated power plants and steering architecture:

450/NC Natural Aspiration Diesel Series

• NEW HOLLAND LS190: Standard production model with 75 SAE Net HP and two-speed hydrostatic drive.
• NEW HOLLAND Lx985: Corresponding technical series model utilizing identical fuel system and internal specifications.

Transmission & Chassis Architecture

• Dual-Range Hydrostatic Drive: Documented for units with variable displacement piston motors (Low Range: 0–7.5 MPH; High Range: 0–12 MPH).
• Steering Control Variants: Applicability covers both standard Foot Pedal control and optional Hand Control (pivoting handle) configurations for boom and bucket operations.

Operational Parameters & Asset Protection

• Interlock Safety System: Technical data on the EIC (Electronic Instrument Cluster) monitoring for seat belt and seat switch logic to prevent unauthorized hydraulic activation.
• Service/Run Logic: Detailed procedures for the Service/Run toggle switch, allowing engine diagnostics while maintaining isolated hydraulic lockouts for safe neutral adjustment.
• Anti-Theft Protocol: Programming sequences for the custom two-digit electronic security code integrated into the EIC to lock boom and bucket valve spools.

Document Metadata

• Print Number: 86589933
• Page Count: 156 Pages
• Publication Date: July 1999 (7/99)

Technical Depth & Factory Benchmarks

Specifications for the LS190 define rigid tolerance levels for major system overhauls and periodic adjustments:

• Valve Clearances (Cold): Intake 0.016” (0.406 mm) / Exhaust 0.019” (0.483 mm).
• Hydrostatic Relief Pressure: Main transmission relief set at 5000 PSI (344.7 bar).
• Charge Pressure Benchmarks: 250–300 PSI (17–20.4 bar) required for pump lubrication and cooling.
• Wheel Hub Speeds: Maximum 67 RPM in Low Range / 106 RPM in High Range to prevent transmission overspeed.

Visual Navigation Aids

The manual utilizes high-fidelity technical illustrations for system diagnostics:

• Electronic Instrument Cluster (EIC): Detailed mapping of backlighted symbols (Functional Groups 1-4) and LED character display codes.
• Chassis Service Access: Visual guides for the unique Cab Tilting Procedure using the specialized Cab Tilt Jack Kit for engine and pump access.
• Hydraulic Layouts: Schematics for standard auxiliary boom hydraulics and High-Flow (33.8 GPM) kit configurations.

Table of Contents

• Section 0: Safety Information & Precautionary Statements
• Section 1: General Information (Serial Number Locations, Controls)
• Section 2: Operation (EIC Logic, Loading, Attachment Mounting)
• Section 3: Lubrication (Interval Charts, Oil Recommendations)
• Section 4: Maintenance (Periodic Service, Belt Tension, Adjustments)
• Section 5: Troubleshooting (Interlock Diagnostics, Cab Tilting)
• Section 6: Optional Equipment (Bucket Types, Weight Kits, High Flow)
• Section 7: Specifications (Engine, Transmission, Dimensions)

Operational Limits & Specifications

Maximum capacities and fluid types are dictated by the following factory requirements:

• Engine Oil Classification: API Service SH/CG-4 (10W-30 standard).
• Cooling System: 16 qt. (15.1 L) capacity; 13 PSI radiator cap pressure.
• Fuel Reservoir: 21.5 gal. (81.4 L) total volume; requires No. 1-D or 2-D Diesel.
• Fastening Torque: Wheel lug nuts must be maintained at 125 ft. lbs. (169 N-m).
• Axle-Hub Hardware: Final drive retaining hardware requires 140 ft. lbs. (190 N-m).