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Power Step LeTourneau L1850 Manual
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Power Step LeTourneau L1850 Manual

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FOLDING STAIRWAY
Manual LeTourneau L1850 Wheel Loader
Rear Mounted Stair
PSA-L-1850 -FS-RF 12-12-14
Model No.: PSA-L1850-FS- RF
Serial No.: PSA-L1850-001 - ~
Date Manufactured: Dec 2014

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Summary of Contents for Power Step LeTourneau L1850

  • Page 1 FOLDING STAIRWAY Manual LeTourneau L1850 Wheel Loader Rear Mounted Stair Model No.: PSA-L1850-FS- RF Serial No.: PSA-L1850-001 - ~ Date Manufactured: Dec 2014 PSA-L-1850 -FS-RF 12-12-14...

  • Page 2: Table Of Contents

    FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair CONTENTS Page 3 Section 1 Installation and Mounting Instructions Installation Drawings: Section 2 Recommended Maintenance Procedure Section 3 Operating Procedure Section 4 Drawings and Repair Parts lists Assembly Complete Parts List...
  • Page 3 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 1 Installation Drawings Mounting Pl. Weldment PSA-L1850-BA-B01 Pg. 3 PSA-L-1850 -FS-RF 12-12-14...
  • Page 4 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 1 Installation Drawings Access Installed PSA-L1850-BA-INST NOTE Follow all on-site/Mine lifting and safety procedures when installing PSFS Pg. 4 PSA-L-1850 -FS-RF 12-12-14...
  • Page 5 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 1 Installation Drawings PSA-L1850-BA-Access Sht. 1 Pg. 5 PSA-L-1850 -FS-RF 12-12-14...
  • Page 6 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 1 Installation Drawings PSA-L1850-BA-Access Sht. 2 STAIR SHOWN IN BOTH POSITIONS DEPLOYED AND STOWED Pg. 6 PSA-L-1850 -FS-RF 12-12-14...

  • Page 7: Section 1 Installation And Mounting Instructions

    Tighten the hydraulic fittings either side of lock valves to restriction fittings. Cycle step unloaded several times to purge all air from hydraulic system. The Power Step will not operate correctly if there is any air in the hydraulic circuit (due to the incorrect operation of the lock valve).

  • Page 8: Section 2 Recommended Maintenance Procedure

    FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 2 Recommended Maintenance Procedure Daily Visually check stairway and structure for damage, loose components, handrails, etc. Check for hydraulic oil leaks from hydraulic cylinders, plumbing and hoses. Notify the appropriate supervisor for any observed damage or malfunction.

  • Page 9: Section 3 Operating Procedure

    NOTE: FLOW CONTROL VALVE ADJUSTMENT: The valve should be positioned to restrict the flow and speed of the Power Step when lowering. Adjust the knob on top of the valve by turning left or right (clockwise) when the step is being lowered, until it is lowering at a safe and reasonable speed.

  • Page 10: 10 4 Assembly Complete

    FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4 Assembly Complete PSA-L1850-FS-RF Pg. 10 PSA-L-1850 -FS-RF 12-12-14...
  • Page 11 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4 Assembly Complete See Drawing Page 11 ITEM PART NO. PART NAME PSA-L1850-FS-RF ASSEMBLY COMPLETE PS-FRA-A04 ACCESS FRAME & MOUNTING ASSEMBLY PS-STR-A16 STAIR ASSEMBLY PS-LOC-A07 LATCH ASSEMBLY PS-62998-AH HYDRAULIC CYLINDER (Stair)
  • Page 12 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stai Section 4.1 Access Frame and Mounting Assembly PS-FRA-04 See Parts List Pg. 12 Does not include Items 2, 2A & 2B Pg. 12 PSA-L-1850 -FS-RF 12-12-14...
  • Page 13 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4.1 Access Frame and Mounting Assembly PS-FRA-A04 See Drawing Page 11 Does not include Items 2, 2A & 2B Item Part No. Part Name PS-FRA-A04 STAIR ACCESS FRAME ASSEMBLY PS-FRA-C56...
  • Page 14 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-2 Stair Assembly PSA-STR-A16 See Parts List Page 14 Pg. 14 PSA-L-1850 -FS-RF 12-12-14...
  • Page 15 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 5-2 Stair Assembly PSA-STR-A16 See Drawing Page 13 Item Part No. Part Name PS-STR-B11-03 STAIR STILE - LEFT HAND PS-STR-B11-04 STAIR STILE - RIGHT HAND PS-HRI-B06-03 STAIR HANDRAIL - LEFT HAND...
  • Page 16 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-3 Latch Assembly PSA-LOC-A07 See Parts List Pg.15 Pg. 16 PSA-L-1850 -FS-RF 12-12-14...
  • Page 17 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-3 Latch Assembly PSA LOC- A07 See Drawing Page 15 Item Part No. Part Name PS-62997 CYLINDER Refer Pg 20 PS-LOC-B03 LATCH FRAME PS-LOC-B05 LATCH WRIST FABRICATION PS-LOC-B04 ACTUATOR ARM FABRICATION...
  • Page 18 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-4 Hydraulic Cylinder & Plumbing Cyl. P/No. PS- 62998-AH NOTE: HYDRAULIC CYLINDER ASSEMBLY P/No PS- 62998-AH includes Part No.s 1 to 11 Item Part No. Part Name PS-62998-AH HYDRAULIC CYL. (with hard plumbing )
  • Page 19 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-4 Hydraulic Cylinder & Plumbing Latch PS- 62997-A Item Part No. Part Name PS-62997 HYDRAULIC CYLINDER - LATCH PS-62997-P CYLINDER PIN PS-62997-SK SEAL KIT-LATCH (NOT SHOWN) PS-60051-5M 9/16 HOSE-HYDR. (9/16”JIC ST. SWIVEL 5M) PS-60050-1.8M 7/16...
  • Page 20 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-4 Hydraulics (Valve Diagram) Double Acting Hydraulic System with directional Control Valve and Cylinder Lock Valve Pg. 20 PSA-L-1850 -FS-RF 12-12-14...
  • Page 21 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-5 Power Pack PS- 80103A-SLD See Parts List Pg 22 View B View A Hoses shown dotted Pg. 21 PSA-L-1850 -FS-RF 12-12-14...
  • Page 22 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-5 Power Pack PS-80103A-SLD See Parts List Pg 22 View A View B NOTE. THE RELIEF PRESSURE OF THE POWERPACK IS TO BE SET TO 2800PSI. IF THE POWERPACK IS REPLACED,THIS RELIEF PRESSURE WILL NEED TO BE RESET USING INLINE GAUGES.

  • Page 23: 21 4-5 Power Pack

    FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-5 Power Pack PS-80103A-SLD See Photos Pg 20 & 21 Item Part No. Part Name PS-80103A-SLD POWER PACK ASSEMBLY PS-21107-METAL MOTOR ENCLOSURE- SEALED ST/ST PS-80103A POWER PACK PS-80103-CLAMP CLAMP ELECTRIC MOTOR...
  • Page 24 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-5 Power Pack PS-80103A-SLD See Photos Pg 20 & 21 Item Part No. Part Name PS-73009 RUBBER BOOT BLACK PS-HD10-3-16P 3 PIN SOCKET (PARK BREAK) PS-HD10-5-16P 5 PIN SOCKET (AUTO-RAISE)
  • Page 25 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls Control Pendant Switch Mounted on Handrail Proximity Switch Assembly Mounted on Fixed Landing Cab Harness & Equipment Refer Wiring Harness Drawings Pg. 25 PSA-L-1850 -FS-RF 12-12-14...
  • Page 26 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls See Page 23 Item Part No. Part Name PS-73013 CONTROL PENDANT SWITCH PS-73013-B CONTROL PENDANT BRACKET PS-77005 HAND RAIL SWITCH HARNESS PS-77009AR AUTO RAISE HARNESS Optional only...

  • Page 27: Electrical Controls Wiring Diagrams

    FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls Wiring Diagrams Page 1 Pg. 27 PSA-L-1850 -FS-RF 12-12-14...
  • Page 28 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls Wiring Diagrams Page 2 Pg. 28 PSA-L-1850 -FS-RF 12-12-14...
  • Page 29 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls Wiring Diagrams Page 3 WIRING HARNESS 1 Pg. 29 PSA-L-1850 -FS-RF 12-12-14...
  • Page 30 FOLDING STAIRWAY LeTourneau L1850 Wheel Loader Rear Mounted Stair Section 4-6 Electrical Controls Wiring Diagrams Page 4 WIRING HARNESS 2 Pg. 30 PSA-L-1850 -FS-RF 12-12-14...
  • Page 31 INSERT ONLY Ground Access Up/Down Switch Kit (with harness and “Y” harness joint) PS-77020 Pg. 31 PSA-L-1850 -FS-RF 12-12-14...
  • Page 32 CONTACT POWER STEP OR ITS LOCAL AREA REPRESENTATIVE TO REQUEST A REPLACEMENT LADDER IF THE LADDER MATERIAL IS BENT, TWISTED OR CRACKED YOU MUST REPORT THE INCIDENT TO POWER STEP SO PROPER REMEDIAL ACTION IS TAKEN TO ADDRESS THE DAMAGE POWER STEP DESIGNED AND FABRICATED THIS PRODUCT UNDER SPECIFIC STANDARDS AND GUIDELINES;...

This manual is also suitable for:

Psa-l1850-fs-rf