Joyce/Dayton Corp. Operation and Maintenance Manual for Joyce/Dayton Stainless Steel Machine Screw Jacks The product described in this catalog is for industrial use only. It may not be used to lift or support people without prior written approval from the Joyce/Dayton Corp. Recommendations in this manual for installation, operation and maintenance must be followed to ensure safe use.
Table of Contents Section I – General Information 1-1 1-2 1-3 1-4 1-5 1-6 Contact Joyce/Dayton ............................................................................................. 2 Purpose and Scope.................................................................................................. 2 Receipt of Product ................................................................................................... 2 Warranty.........................................................................
material or workmanship. Products or parts or components thereof, which are repaired or replaced by seller, will be returned to buyer freight collect. This warranty is not intended to cover consumer products, as defined in the Magnuson-Moss Warranty-Federal Trade Commission Improvement Act, 15 U. S. C. Sections 2301-12, which are purchased by buyer for purposes other than resale.
7. When fastening the load to a jack, make sure the jack is in the retracted position. This positions the load accurately with respect to the jack screw centerline. Never pull the screw to one side to make connection with your structure. Fully extend the jack to make sure the load is aligned with the lifting screw. 8. Jacks should be mounted with S.A.E. Grade 8 bolts or equivalent. 9. Torque all mounting bolts in a symmetric pattern to avoid damage to the sleeve. 10.
Recommended repair parts for rebuild or spares. Refer to Section 3-1 Exploded view and Section 3-2 Parts List. A. (1) Thrust bearing – Item 4 B. (1) Wormgear – Item 5 C. (2) Worm shaft bearing and race – Item 6 D. (2) Worm shaft seal – Item 7 (2-ton and above) E. (1) Shim kit – Assortment of item 8 F. (1) Worm - 12 G. (1) Lifting screw - 14 H. (1) Boot (if signs of wear are evident) – Item 24 I.
the lifting screw. It is very important not to allow any side load on a keyed jack, as the key can cut into the lifting screw, and severely affect the life of the jack. 5. Remove screws, (item 10) from the bearing caps (item 3). Remove the bearing caps and seals (item 7) carefully to avoid damaging seals. Make sure keys have been removed first. 6. Carefully remove the shims (item 8) from the jack sleeve or bearing cap. NOTE: there will not necessarily be an equal quantity of shims per side.
3-1 Exploded View PARTS LIST FOR ALL JOYCE STANDARD STAINLESS STEEL MACHINE SCREW JACKS MODELS "SWJ", "DSWJ", "RSWJ", And "DRSWJ" Translating Screw, Keyed, and Keyed For Traveling Nut Versions (Upright Style shown for illustration) Type 4 Clevis End 26 Type 1 Plain End 14 Type 2 Load Pad 23 14 24 Type 3 Threaded End 23 5 20 13 27 2 28 KFTN Screw and Nut Ass'y 21, 22 4 5 10 9 8 8 16 4 16 8 6 12 6 8 8 7 8 3 17 1 15 11 9 10 7 3 7
3-2 Parts List – Translating and KFTN jacks Parts list Table Item Translating Item KFTN- Keyed For Traveling Nut 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Sleeve Sleeve Cap Bearing Cap (2) Thrust Bearing Wormgear Worm Shaft Bearing (2) Worm Shaft Seal (2) Shims Bearing Cap Lockwasher (6-8) Bearing Cap Screw (6-8) Protection Tube Worm (Input Shaft) Set Screw – sleeve cap (4) Lifting Screw Protection Tube Adapter Seal (2) Grease Fitting Drive Screw (2) Name Plate Flange Bushing Key–
3-3 Specifications Model Number (RS)WJT62 (R)SWJT122 (R)SWJT242 (R)SWJT252 D(R)SWJ62 D(R)SWJ122 D(R)SWJ242 SWJT65 SWJT125 SWJT245 DSWJ65 DSWJ125 DSWJ245 SWJ810 SWJ2410 DSWJ810 DSWJ2410 Capacity 2 TON 2 TON 5 TON 5 TON 10 TON 10 TON Lifting Screw Diameter (inches) 1 1 1 1/2 1-1/2 2 2 Thread Pitch/Lead (inches) .250 Pitch Acme .250 Pitch .500 Lead Acme .375 Pitch Stub Acme .250 Pitch .500 Lead Acme .500 Pitch Acme .333 Pitch .
3.3 Specifications (continued) Model Number SWJ815 SWJ2415 DSWJ815 DSWJ2415 SWJ820 SWJ2420 DSWJ820 DSWJ2420 SWJ1125 SWJ3225 DSWJ1125 DSWJ3225 Capacity 15 TON 15 TON 20 TON 20 TON 25 TON 25 TON Lifting Screw Diameter (inches) 2 1/4 2 1/4 2 1/2 2 1/2 3 3/8 3 3/8 Thread Pitch/Lead (inches) .500 pitch Acme .333 Pitch .666 Lead Acme .500 pitch Acme .375 Pitch .750 Lead Acme .666 Pitch Stub Acme .5625 Pitch 1.
3-4 Serial number and Maintenance Date Maintenance Performed Initials Joyce Dayton Serial Number Tag . Contact Joyce Dayton Corporation and provide the serial number to obtain the product information needed for maintenance, repair and reorder. Joyce/Dayton Corp P.O. Box 1630 Dayton, Ohio 45401 Phone (800) 523-5204 (U.S. & Canada); (937) 294-6261 Fax (937) 297-7173 www.joycedayton.com E-mail: sales@joycedayton.
