Harbor Freight Tools 41487 User's Manual
Contents
1. EICENTRAL HYDRAULICS AIR OVER HYDRAULIC JACK 20 TON ee 1 41487 ASSEMBLY AND OPERATING INSTRUCTIONS 3491 Mission Oaks Blvd Camarillo CA 93011 Visit our Web site at http www harborfreight com Copyright 1999 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools For technical questions and replacement parts please call 1 800 444 3353 Specifications ITEM DESCRIPTION Capacity 20 tons maximum 10 3 8 inch minimum 20 1 4 inch maximum Ram 2 12 inch diameter 6 1 2 inch length Height Movement Air Inlet Fitting 1 4 inch NPT Weight 36 6 Ibs Base Dimensions 7 1 2 x 4 3 4 3 8 inch O D x 48 inches long with crimped hose fittings Air Pressure 90 125 PSI Save This Manual Air Hose You will need the manual for the safety warnings and precautions assembly instructions operating and maintenance procedures parts list and diagram Keep your invoice with this manual Write the invoice number on the inside of the front cover Keep the manual and invoice in a safe and dry place for future reference Safety Warnings and Precautions WARNING When using tool basic safety precautions should always be followed to reduce the risk of personal injury and damage to equipment Read all instructions before using this tool 1 Do not ov2. 3 into the Air Pump 4 and tighten 2 Connect the Air Hose 2 to the Connector 3 Tighten the Air Hose to prevent air loss Connect the other end of the Air Hose to the Valve Body 1 6 4 Connect the two pipe Handles 5 6 together Operation Lifting 1 Place the slotted end of the Lower Handle 6 over the Release Valve 18 21 Refer to the photo on the next page and the Assembly Drawing on the last page of this manual Turn the Valve Release screw clockwise until snug 3 Place the Jack into position under the load Caution Follow all Safety and Precautions listed on pages 2 and 3 4 Adjust the Extension Screw 44 as needed Turn Counterclockwise to raise clockwise to lower Insert the big end of the Handle assembly into the Handle Sleeve 7 6 Connect the air supply hose lock fitting into the Air Inlet Fitting The Lever 1 13 should be Off not in the locked position SKU 41487 Page 4 REV 05 04 TA 8 Lowering 9V N g Press the Lever 1 13 to the On position and lock using the Lock Lever 1 17 This provides a continuous air supply to the Air Pump 4 Raise the Jack by alternately lifting and lowering the Handle assembly Extension Screw 44 Connector 3 Handle fits in PEPEES IA Handle Sleeve 7 Air Pump Release Valve 18 21 4 Lever 1 13 and Lever Lock 1 17 sAN re Hose Connector 1 1 ake Caution Avoid rapid descent of the load Turn the R
3. 4 Pin 1 5 1 6 Connector Valve Spring Filler Plug 1 7 1 8 Packing Screw Plug Screw 1 9 Throttle Plunge Washer 1 10 1 11 O ring 3 X 1 6 O ring 18 X 2 4 Overload Valve Screw Safety Valve Spring 1 12 Nut Tapering Overload Valve 1 13 Valve Body 1 Lever Filter Net 1 15 Lever Ring 1 Spring Washer 8 Hose Connector 1 Nut 8 Bolt M8 X 3 5 Lock Lever Air Hose Connector Base Plug Screw Cylinder Bottom Seal Air Pump Reservoir Handle Upper Handle Lower Packing Cylinder Handle Sleeve Steel Ball Retainer Shaft Pin Cylinder Top Seal Cotter Pin Pump Plunger Pump Plunger Retainer Extension Screw O ring 0 ring Dust Resistant Ring Pump Reservoir O ring Returner Ram Header Copper Washer Ram 3 4 5 6 7 8 9 11 12 13 14 15 16 EA 17 SKU 41487 Steel Ball 6 Plunger Connecting Rod Page 7 Spring Spring Plate REV 05 04 Assembly Drawing te Ai A SSS a EN gt NER i i H 4 y are x z amp SKU 41487 eer
4. e assembly Top off jack Reservoir 37 as described below Replace the Filler Plug 23 Oil Replacement 1 yD RAON Place Jack in an upright position Completely lower the Ram 48 Remove the Filler Plug 23 Fill with high quality hydraulic jack oil to the lower rim of the fill hole Purge air from the hydraulic system as previously described Top off with more hydraulic oil Replace Filler Plug 23 PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY NEITHER THE MANU FACTURER NOR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY RE PAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT IN FACT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO SKU 41487 Page 6 REV 05 04 1 1 Parts List oesenpron an por peserpton Jaw Rlease Valve Screw tk 1 2 1 3 Hose Connector 1 Connecting Nut Air Filter 19 Release Valve Seal Steel Ball 6 35 1 4 O ring 18 X 2
5. elease Valve slowly Handle 5 6 Release the Lock Lever 1 17 to stop air flow to the Air Pump 2 Remove air supply hose from the Air Inlet Fitting Place the slotted end of the Handle 5 6 assembly over the Release Valve 18 21 Slowly and carefully lower the load by turning the Release Valve counterclockwise in extremely small increments using only the Handle assembly never your hand Lower the Extension Screw 44 as needed by turning clockwise Remove the Jack Maintenance General Care 1 2 Periodically lubricate the joints and Extension Screw 44 with a light oil as needed Clean the outside of the Jack with a dry clean cloth If the Jack is exposed to moisture wipe dry with a clean cloth and lubricate as noted above Store jack with Extension Screw 44 and Ram 48 fully collapsed SKU 41487 Page 5 REV 05 04 Purging Air from the Hydraulic System Air bubbles can become trapped inside the hydraulic system thereby reducing the efficiency of the Jack Purge the air from the system if lift efficiency drops 1 Place the slotted end of the Handle 5 6 assembly over the Valve Release screw 18 21 and turn 1 1 2 turns counterclockwise Remove the oil Filler Plug 23 on the side of the jack Reservoir 37 by gently pulling and turning it Rapidly pump the Handle assembly several times to purge the air from the hydraulic system Turn the Release Valve screw clockwise until snug using the Handl
6. erload this equipment Know the weight of the item being lifted 2 Use Jack for lifting only Do not use this equipment for any other purpose Immediately after lifting support the load with appropriate supporting equipment 3 Place Jack correctly Only use this equipment on a surface that is stable level clean and dry and capable of sustaining the load 4 Stabilize load Ensure that the load remains stable at all times Do not move load while on the Jack 5 Vehicle lifting When lifting a vehicle apply the emergency brake and block all wheels Keep work area clean Cluttered areas invite injuries Observe work area conditions Do not use machines or power tools in damp or wet locations Don t expose to rain Keep work area well lighted Do not use electrically powered tools in the presence of flammable gases or liquids 8 Keep children away Children must never be allowed in the work area Do not let them handle machines tools or extension cords SKU 41487 Page 2 20 21 Store idle equipment When not in use tools must be stored in a dry location to inhibit rust Always lock up tools and keep out of reach of children Do not force tool It will do the job better and more safely at the rate for which it was intended Do not use inappropriate attachments in an attempt to exceed the tool capacity Use the right tool for the job Do not attempt to force a small tool or attachment to do the work of a larger industr
7. ial tool Do not use a tool for a purpose for which it was not intended Dress properly Do not wear loose clothing or jewelry as they can be caught in moving parts Protective electrically non conductive clothes and non skid footwear are recommended when working Wear restrictive hair covering to contain long hair Use eye and ear protection Always wear ANSI approved impact safety goggles Wear a full face shield if you are producing metal filings or wood chips Wear an ANSI approved dust mask or respirator when working around metal wood and chemical dusts and mists Do not overreach Keep proper footing and balance at all times Do not reach over or across running machines Maintain tools with care Keep tools sharp and clean for better and safer performance Follow instructions for lubricating and changing accessories Inspect tool cords periodically and if damaged have them repaired by an authorized technician The handles must be kept clean dry and free from oil and grease at all times Remove adjusting keys and wrenches Check that keys and adjusting wrenches are removed from the tool or machine work surface before plugging it in Stay alert Watch what you are doing use common sense Do not operate any tool when you are tired Check for damaged parts Before using any tool any part that appears damaged should be carefully checked to determine that it will operate properly and perform its intended function Check for alignmen
8. t and binding of moving parts any broken parts or mounting fixtures and any other condition that may affect proper operation Any part that is damaged should be properly repaired or replaced by a qualified technician Do not use the tool if any switch does not turn On and Off properly Replacement parts and accessories When servicing use only identical replacement parts Use of any other parts will void the warranty Only use accessories intended for use with this tool Approved accessories are available from Harbor Freight Tools Do not operate tool if under the influence of alcohol or drugs Read warning labels on prescriptions to determine if your judgment or reflexes are impaired while taking drugs If there is any doubt do not operate the tool Not to be used for any aircraft purposes REV 02 04 SKU 41487 Page 3 Warning The warnings cautions and instructions discussed in this in struction manual cannot cover all possible conditions and situations that may occur It must be understood by the operator that common sense and caution are factors which cannot be built into this product but must be supplied by the operator Unpacking When unpacking check to make sure the following parts are included If any parts are missing or broken please call Harbor Freight Tools at the number on the cover of this manual as soon as possible Two piece Handle Hose and Fittings Air Inlet Fitting Assembly 1 Screw the Connector
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