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Owner's Manual & Safety Instructions
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operating, inspection, maintenance and cleaning procedures. Write the product's serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference.
56684 - 4 Ton
56734 - 8 Ton
56739 - 12 Ton
56738 - 12 Ton
Low Profile
56736 - 20 Ton
56735 - 20 Ton
Low Profile
56737 - 30 Ton
Email our technical support at: productsupport@harborfreight.com
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
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Copyright
2020 by Harbor Freight Tools
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.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Keep this manual for the safety warnings and precautions, assembly,
Visit our website at: http://www.harborfreight.com
®
. All rights reserved.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
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Table of Contents
Related Manuals for Pittsburgh 56684
Summary of Contents for Pittsburgh 56684
- Page 1 (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference. 56684 - 4 Ton 56734 - 8 Ton...
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Page 2: Specifications
Specifications Max. Min. Base ITEM Weight Capacity Height Height Dimensions 56684 4 Tons (8,000 lb.) 14-1/4" 7-1/2" 4-3/8" x 3-3/4" 56734 8 Tons (16,000 lb.) 17-5/8" 9" 5" x 4-3/8" 56738 12 Tons (24,000 lb.) 15" 7-5/8" 5" x 5"... - Page 3 Do not use for aircraft purposes. 20. Before use, read manufacturer’s instruction manual for the vehicle 10. Apply parking brake and chock (or object) you will lift. tires before lifting vehicle. 21. When lifting only one wheel, support the 11. Lift vehicle only at manufacturer- load immediately with one jack stand (not recommended locations.
- Page 4 Operating Instructions Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this document including all text under subheadings therein before set up or use of this product. Bleeding IMPORTANT! Before first use, check Carefully use a flat dull-sided edge to for proper hydraulic oil level in the push down the top inside rim of the Oil Jack.
- Page 5 Lifting Place the Handle in the Fulcrum and pump WARNING! TO PREVENT SERIOUS until the top of the Jack’s Saddle has INJURY: Set Jack on a flat, level, solid, nearly reached the vehicle lifting point. ground surface. If using with vehicle, set safely away from oncoming traffic Saddle and turn off vehicle’s engine.
- Page 6 Lowering Saddle Remove all tools, parts, etc. from under the vehicle. Position the Saddle under the lifting point. Place Handle over Release Valve and turn the Handle firmly clockwise to close the Release Valve. Move the Handle to the Fulcrum and pump to raise the vehicle slightly above the saddle(s) of the jack stand(s).
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Page 7: Maintenance And Servicing Instructions
Maintenance and Servicing Instructions Procedures not specifically explained in this manual must be performed only by a qualified technician. TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION: Do not use damaged equipment. If abnormal noise or vibration occurs, have the problem corrected before further use. Cleaning, Maintenance, and Lubrication Before each use, inspect the general Change the hydraulic oil at least... -
Page 8: Troubleshooting
Troubleshooting TO PREVENT SERIOUS INJURY: Use caution when troubleshooting a malfunctioning jack. Stay well clear of the supported load. Completely resolve all problems before use. If the solutions presented in the Troubleshooting guide do not solve the problem, have a qualified technician inspect and repair the jack before use. -
Page 9: Parts Lists And Diagrams
Parts Lists and Diagrams Parts List and Diagram (56684, 56734, 56736 and 56739) Part Description Part Description Round Wire Snap Ring Safety Valve Rectangular Ring Spring O-Ring Spring Holder Ball Bearing Ø3mm Bowl Washer Ball Bearing Ø5mm O-Ring Bowl Washer... - Page 10 Parts List and Diagram (56735 and 56738) Part Description Part Description Round Wire Snap Ring Steel Ball Guide Bush Pump Plunger O-Ring Retainer Ring Elevating Screw O-Ring Stop Block Pump Cylinder Filter Piston Cap Seal Cotter Pin O-Ring Link Base Release Valve Rivet O-Ring...
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Page 11: Parts List And Diagram
Parts List and Diagram (56737) Part Description Part Description Round Wire Snap Ring Spring Spring Holder Rectangular Ring Steel Ball Ø3mm O-Ring Retainer Washer Pump Plunger Assembly Bowl Washer Oil Fill Plug O-RIng Cutter Pin Round Wire Snap Ring Housing Fulcrum Steel Bass Ø6mm Handle Assembly... -
Page 12: Limited 90-Day Warranty
Note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. Parts may not be interchangeable. When ordering replacement parts, specify UPC number of the item you are ordering the part for: 4-Ton (56684): 193175369697 8-Ton (56734): 792363567343 12-Ton (56739): 792363567398...
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Questions and answers
I removed the release valve on my 56789 Jack. But I can't put it back. The tip hits something before that threads engage. What do I do
If the tip of the release valve hits something before the threads engage, it may be misaligned. To properly reattach the release valve:
1. Ensure the jack is not under load and is fully lowered.
2. Inspect the threads on both the release valve and the housing for damage or debris.
3. Align the valve carefully and attempt to thread it by hand to avoid cross-threading.
4. If resistance is felt before the threads engage, stop and realign.
5. Do not force the valve; repeated misalignment may damage threads.
If the valve still cannot be reattached, have a qualified technician inspect and repair the jack.
This answer is automatically generated
I have Jack 56739,