HHD Series Heavy Duty Hydraulic Cylinders

51 Maintenance, Service & Installation Specifications and prices are subject to change without notice or incurring obligations. Tel: 352-373-3578; Fax 352-375-8024 • email: service@fabco-air.com REPAIR INFORMATION INTRODUCTION This manual will help users store, install, maintain and, if needed, repair HHD Series cylinders. CYLINDER IDENTIFICATION HHD Series cylinders can be identified by serial number or model number. Cylinders are tagged with bore, stroke, and serial number on a metal tag attached to the head. In addition, the serial number is stamped into the steel of the front head. These numbers should always be referenced when requesting parts or for general service inquiries. STORING OF CYLINDERS If there is a need to store the cylinders for any period of time, please follow these simple instructions to help keep the cylinder in ready condition: 1. Coat the interior of the cylinder with oil and leave half filled if practical. 2. Plug all ports to ensure foreign matter is kept out of the cylinder. 3. Try to store the cylinder in a vertical position if at all possible; if not, regularly rotate the cylinder 90 degrees to ensure seals maintain proper shape and elasticity. 4. Keep all mounting surfaces and threads either covered or coated with protective lubricant. 5. Try to store components in a clean, dry area that maintains a relatively constant temperature. IF STORING FOR LONGER THAN ONE MONTH, ALWAYS THOROUGHLY LUBRICATE THE CYLINDER. STROKE NUMEROUS TIMES BEFORE INSTALLATION OR USING UNDER LOAD. 10-12-16 TABLE OF CONTENTS Introduction ..................................................................... 51 Cylinder identification...................................................... 51 Storing of cylinders ......................................................... 51 Installation....................................................................... 51 Troubleshooting .............................................................. 52 Replacement parts.......................................................... 53 Replacement parts chart................................................. 54 Piston replacement ........................................................ 55 Rod cartridge replacement ............................................. 55 Barrel to head replacement ............................................ 56 Cushion adjustment ........................................................ 57 INSTALLATION The preferred method of mounting the cylinder to a machine is to have the equipment machined to fit the cylinder's exact dimensions with proper alignment already taken into account so that mounting the cylinder ensures perfect alignment. Unfortunately, this is not always an option from a cost or design aspect so alignment must be ensured at time of installation. On fixed mount cylinders that are secured in one position, it is always best to bolt the cylinder down as the last step in installation. When attaching the piston rod end to the load, the piston rod must be attached and held squarely to ensure the centerline is parallel to the guides of the attached load or parallel to the line of movement along the entire stroke. Torque piston rod to load. Insert mounting bolts securely enough to cycle cylinder but do not tighten. The application operation should be cycled with low pressure air under reduced or no load to ensure that all components are operating freely. Finish torquing mounting bolts and re-check. Piping: All fittings should be free of burrs and sealed with either o-ring or appropriate pipe tape. Make sure all hoses are properly flushed of contaminants before attachment. Do not overtighten fittings. On oversized rods, beware of shallow tapped ports. Hydraulic filtration should be to power unit manufacturer's specifications. Pneumatic systems should have a water separator, 50 micron or smaller filter, and a lubricator as close to the cylinder as possible.

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