Boart Longyear LF90 LS Operations & Service Manual – PDF

Description

Boart Longyear LF90 LS Operations & Service Manual  Hydraulics & Repair PDF DOWNLOAD

This is the official Operations and Service Manual for the Boart Longyear LF90 Long Stroke (LS) Diamond Core Drill System. This high-quality PDF provides an in-depth technical resource for operating, servicing, and troubleshooting this modular drill rig.

Whether you are troubleshooting the primary hydraulic circuit, performing a complete teardown of the PQ Rotation Unit, or simply looking for the correct anchoring procedures, this manual provides manufacturer-verified procedures. It includes extensive coverage of the hydraulic logic, making it invaluable for diagnosing pressure issues in the rotation, fast feed, or hoist circuits.

Key Topics Covered:

• Drill Introduction & Safety

  • Recommended Practices for Mast Maintenance

  • Visual Inspection Checklists & Safety Decals

  • Ordering and Returning Parts

• Modular Drill Components

  • Power Unit (Cummins 6BTA 5.9L) & Instrument Panel

  • Hydraulic Module & Reservoir

  • Draw Works, Sub Frame, and Drill Base

  • Mast Sections (Lower, Middle, Upper) & Crown Block

• Drilling Operations

  • Pre-Start Checks & Anchoring Methods (Trenches, Concrete)

  • Mast Installation, Raising, and Lowering Procedures

  • Rod Handling: Making and Breaking Joints

  • Calculating Force on Diamond Bit

• PQ Rotation Unit Group (Detailed Service)

  • Complete Disassembly & Reassembly Procedures

  • Transmission & Head Box Lubrication

  • PQ Nitro Gas Chuck: Planograph & Assembly

  • Bearing & Seal Replacement

• Hydraulic Explanation & Schematics

  • Primary Circuit: Main Valve Bank & Relief Settings

  • Rotation Circuit: Motor Displacement & Speed Control

  • Fast Feed Circuit: Cylinder & Pressure Reducing Valves

  • Auxiliary Circuit: Mud Mixer, Rod Clamp, & Mast Raising

  • Full Hydraulic Schematic Diagrams

• General Maintenance

  • Head Slide Wear Bars Adjustment

  • Complete Lubrication Chart & Filter Reference

Features:

• Detailed Diagrams: Exploded views of the PQ Head and Wireline Hoist.

• Hydraulic Logic: Step-by-step explanations of how the hydraulic systems interact.

• Searchable Text: Fast access to torque specs and pressure settings.

FILE DETAILS:

• Manual Name: LF90 Long Stroke Operations and Service Manual (MKT1542 Rev 3)

• Models Covered: Boart Longyear LF90, LF90LS

• Year: 2005

• PDF Quality: High-Quality, Searchable, Printable

• No. of Pages: 154 Pages

Minimize costly downtime on the job site. Download this essential technical manual instantly and get the hydraulic expertise and repair procedures you need to keep your LF90 turning to the right.”