Summary of Contents for Power Step Caterpillar 785D
- Page 1 FOLDING RETRACTABLE STAIRWAY Manual for Cat 785D Haul Truck Model No.: PSA-785D-FS Serial No.: 785D-001 to 785D-002 Date Manufactured: Sept 2009 PSA-CAT785-FS 25-7-13B...
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Page 2: Table Of Contents
FOLDING STAIRWAY Caterpillar 785D Haul Truck CONTENTS Page 2 Section 1 Mounting and Installation Section 2 Electrical Installation Section 3 Installation of Hydraulic Power Pack Enclosure Section 4 Operating Procedure Section 5 Recommended Maintenance Procedure Section 6 Assembly Complete-Main Assemblies... -
Page 3: Section 1 Mounting And Installation
- see View 5. Fit the Power Step Landing & Stairs. View 7 shows the location of all the relevant boltholes. Welding: all Cat SP to AS1554, 6 cfw uno. - Page 4 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 1. Mounting and Installation 23815 PSA-CAT785-FS 25-7-13B...
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Page 5: Section 2 Electrical Installation
Install short blue wire to screw terminal of Caterpillar circuit breaker, and other end to fuse holder. Run wiring harness from Power Step Folding Stairway magnetic proximity switch around under radiator, and follow cabling/hose routing up to air line/ electrical outlet on rear Right Hand Side of cabin. -
Page 6: Section 3 Installation Of Hydraulic Power Pack Enclosure
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 3. Installation of Hydraulic Power Pack Enclosure Main Hydraulic Enclosure is positioned on top of front bumper, as indicated position to allow easy access as walking up or down diagonal stairway across front of radiator. -
Page 7: Section 4 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 8: Section 5 Recommended Maintenance Procedure
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 5. 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: 10 6-1 Assembly Complete
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6. Assembly Complete - Main Assemblies See Pg 10 Item Part No. Part Name PSA-785D-FS ASSEMBLY COMPLETE PS-23812-A LANDING ASSEMBLY (INC.HANDRAILS) REFER TO 6.2FOR DETAILS PS-23811-A FOLDING STAIRS ASSEMBLY (INC.HANDRAILS) REFER TO 6.5 FOR DETAILS... - Page 10 FOLDING STAIRWAY Caterpillar 785D Haul Truck Hydraulic Operation Section 6-1. Assembly Complete Pg10 PSA-CAT785-FS 25-7-13B...
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Page 11: 11 6-2 Landing Assembly
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-2. Landing Assembly PS 23812-A Pg11 PSA-CAT785-FS 25-7-13B... - Page 12 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-2. Landing Assembly PS-23812-A Parts List See Drawing Pg 11 (Does not include items 4,7,8,9,10 and 11) Item Part No. Part Name PS-22502 FRAME PS-22507-97 HANDRAIL - FRONT PS-22507-96 HANDRAIL - REAR PS-23813-00...
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Page 13: 13 6-3 Stair Assembly
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-3. Stair Assembly PS-23811-A Pg13 PSA-CAT785-FS 25-7-13B... -
Page 14: Parts List
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-3. Stair Assembly PS-23811-A Parts List See Drawing Page 13 Item Part No. Part Name PS-23811 STRINGER ASSEMBLY ONLY PS-23811-F HANDRAIL-FRONT PS-23811-R HANDRAIL-REAR PS-22501 STAIR TREADS PS-22509 PIVOT SHAFT-STAIRS PS-40001 RUBBER STOP PS-63009-B... -
Page 15: Electrical System
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-4. Electrical System Control Pendant Switch Mounted on Handrail Proximity Switch Assembly Mounted on Fixed Landing PS-73013 Control Pendant Switch PS-75430 Proximity Switch PS-77004 Harness for Proximity Switch PS-73013B Pendant Bracket Cab Harness & Equipment... - Page 16 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-5 . Hydraulic Cylinder Assembly 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 ) PS-62998-HPK...
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Page 17: 17 6-5 Hydraulic Cylinder Valve Diagram
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-5 Hydraulic Cylinder Assembly (Valve Diagram) Double Acting Hydraulic System with directional Control Valve and Cylinder Lock Valve Pg17 PSA-CAT785-FS 25-7-13B... -
Page 18: Power Pack
FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-6. Power Pack PS-80103A-SLD See Parts List Pg 20 View B View A Hoses shown dotted Pg18 PSA-CAT785-FS 25-7-13B... - Page 19 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-6 Power Pack PS-80103A-SLD See Parts List Pg 20 View A BEACON WORKLIGHT 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 20 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-6 Power Pack PS-80103A-SLD See Photos 18 & 19 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 PS-82415 AUDIBLE ALARM...
- Page 21 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-4 . Electrical System - Wiring Harness 1 Pg21 PSA-CAT785-FS 25-7-13B...
- Page 22 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-4 . Electrical System - Wiring 2 Pg22 PSA-CAT785-FS 25-7-13B...
- Page 23 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-4 . Electrical System - Wiring 3 WIRING HARNESS Pg23 PSA-CAT785-FS 25-7-13B...
- Page 24 FOLDING STAIRWAY Caterpillar 785D Haul Truck Section 6-4 . Electrical System - Wiring 4 Pg24 PSA-CAT785-FS 25-7-13B...
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