6009757_C-Fork Positioner Service Manual - Cascade Corporation

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T ROUBLESHOOTING 4.1 General Procedures 4.1-1 Truck System Requirements • Truck hydraulic pressure should be within the range shown in Specifications, Section 6.1. PRESSURE TO THE FORK POSITIONER MUST NOT EXCEED 2300 psi (160 bar). • Truck hydraulic flow should be within the range shown in Specifications, Section 6.1. • Hydraulic fluid supplied to the Fork Positioner must meet the requirements shown in Specifications, Section 6.1. 4.1-2 Tools Required In addition to a normal selection of hand tools, the following are required: • 20 GPM (75 L/min) inline flow meter. (Cascade Flow Meter Kit, part no. 671477.) • 3000 psi (200 bar) pressure gauge. (Cascade Pressure Gauge Kit, part no. 671212.) • Assorted fittings, drain hoses and quick-disconnects as required. 4.1-3 Troubleshooting Chart Determine All The Facts – It is important to gather all the facts about the problem before beginning any service procedures. The first step is to talk to the equipment operator. Ask for a complete description of the malfunction. Guidelines below and on the following pages can then be used as a starting point to begin troubleshooting. Fork Positioning Circuit • Forks have uneven travel. • Forks move slowly. • Forks will not move. To correct these problems, see Section 4.3. NOTE: Some Fork Positioners have a regenerative hydraulic circuit that causes the forks to open at a faster speed than when closing. This is a normal function. Sideshift Circuit • Forks sideshift left and right at different speeds. • Forks will not sideshift. To correct these problems, see Section 4.4. WARNING: Before servicing any hydraulic component, relieve pressure in the Attachment system. Turn the truck off and move the truck auxiliary control lever several times in both directions. After completing any service procedure, always test the Attachment through several cycles. First test empty to bleed any air trapped in the system to the truck tank. Then test with a load to assure that the Attachment operates correctly before returning to the job. Stay clear of the load while testing. Do not raise the load more than 4 in. (10 cm) off the floor while testing. Pressure Gauge* Flow Meter Kit 671477 (2) No. 8-12 JIC/ O-Ring (2) No. 6-8 JIC Reducer Pressure Gauge Kit 671212 No. 4-6 Pipe/JIC* No. 6-6 Hose* GA0014.ill No. 6-8 JIC Reducer AC0127.ill Flow Meter GA0013.ill No. 6 and No. 8 JIC Swivel Tee Diagnostic Quick-Disconnects Female JIC Thread QD Coupler: No. 4 (Part No. 210385)* No. 6 (Part No. 678591) No. 4, No. 6* and No. 8 JIC/O-Ring Male Straight Thread O-Ring Coupler: No. 4 (Part No. 212282)* No. 5 (Part No. 210378) No. 6 (Part No. 678592) * included in Diagnostics Kit 394382. 10 6009757 Rev. 0
T ROUBLESHOOTING 4.2 Plumbing 4.2-1 Hosing Diagram, Fork Position Circuit Attachment Valve Truck Auxiliary Valves Sideshift Cylinder Fork Position Cylinders (2) CLOSE Port OPEN Port Pressure: Return: Hose Reel or Internal Reeving Sideshift Cylinder Truck Auxiliary Valve (with pushbutton) CLOSE FORKS SPREAD FORKS SOLENOID ADAPTION To Fork Position Cylinders CLOSE Port Solenoid Valve (Energized) 6009757 Rev. 0 11 P Port T Port OPEN Port FP0322.ill Hose/Cable Reel or Internal Reeving
Page 1 and 2: S ERVICE MANUAL C-Series Fork Posit
Page 3 and 4: I NTRODUCTION 1.1 Introduction This
Page 5 and 6: I NSTALLATION 2.2 Recommended Hydra
Page 7 and 8: I NSTALLATION 3 Mount Fork Position
Page 9 and 10: I NSTALLATION 6 Flush 8 Install 9 I
Page 11: TP ERIODIC ROUBLESHOOTING MAINTENAN
Page 15 and 16: T ROUBLESHOOTING 4.2-3 Hosing Diagr
Page 17 and 18: T ROUBLESHOOTING 4.2-5 Hydraulic Ci
Page 19 and 20: T ROUBLESHOOTING 4.3-3 Valve Test 1
Page 21 and 22: T ROUBLESHOOTING 4.4-3 Sideshifting
Page 23 and 24: S ERVICE 5.1 Fork Positioner Remova
Page 25 and 26: S ERVICE 5.2-2 Fork Inspection •
Page 27 and 28: S ERVICE 5.3 Valve 5.3-1 Valve Remo
Page 29 and 30: S ERVICE 5.4 Sideshift Cylinder 5.4
Page 31 and 32: S ERVICE 5.4-4 Cylinder Reassembly
Page 33 and 34: S ERVICE 5.5-2 Cylinder Disassembly
Page 35 and 36: S ERVICE 5.6 Sideshifting Frame 5.6
Page 37 and 38: S PECIFICATIONS 6.1 Specifications
Page 40: Do you have questions you need answ

6009757_C-Fork Positioner Service Manual - Cascade Corporation

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