Joyce MWJ2410 User Manual

Joyce/Dayton Corp

.

Operation and Maintenance Manual

Joyce/Dayton Metric Screw Jacks

WARNING!

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. The recommendations in this manual for
installation, operation and maintenance must be followed to ensure safe use. All persons responsible for
the installation and use of Joyce Jacks must be familiar with the contents of this manual.

Customer is responsible for providing travel stops.

©2010 Joyce/Dayton Corp. All rights reserved FB0187 – 1/10

Table of Contents

Section I – General Information

1-1 Contact Joyce Dayton Corp...................................................................................2

1-2 Purpose and Scope..................................................................................................2

1-3 Receipt of Product ...................................................................................................2

1-4 Warranty.....................................................................................................................2

1-5 Precautions of Use and Installation......................................................................3

1-6 General Installation Instructions............................................................................3

Section II – Maintenance

2-1 Lubrication ................................................................................................................4

2-2 Repair Parts...............................................................................................................5

2-3 Disassembly of Metric Screw Jack........................................................................5

2-4 Inspection of Components.....................................................................................6

2-5 Assembly of Metric Screw Jack.............................................................................6

Section III – Views & Parts list

3-1 Exploded views.........................................................................................................7

3-2 Parts List for Metric Screw Jacks..........................................................................8

3-3 Specifications ...........................................................................................................9

3-4 Serial Number and Maintenance Log....................................................................10

Section I

General Information

1-1 Contact Joyce Dayton Corp.

Joyce Dayton Corp.
P.O. Box 1630
Dayton, OH 45401
[phone] (US and Canada only)
[phone] [phone] Fax
Email: [e-mail]
Website: www.joycedayton.com

1-2 Purpose and Scope

This manual provides installation, operation and maintenance instruction for standard
Joyce Dayton metric screw jacks. Although this manual covers the standard metric jacks
and most variations of the Joyce Dayton metric screw jack, there may be some jacks that
vary significantly from this manual. For special jacks not covered, please contact Joyce
Dayton Corporation for assistance.

1-3 Receipt of Product

All equipment should be immediately inspected upon receipt for any damage and to verify
correct product and quantities. Any problems should be reported to Joyce/Dayton Corp.
and the freight carrier as soon as possible. Products returned without a Return Goods
Authorization (RGA) form will not be accepted.

1-4 Warranty

Seller warrants its products to be free from defects in material and workmanship under
normal and proper use in accordance with instruction of seller for a period of one year
from the date of shipment to buyer. Seller's liability under such warranty or in connection
with any other claim relating to the products shall be limited to the repair, or at seller’s

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option, the replacement or refund of the purchase price, of any products or parts or
components thereof which are returned to seller freight prepaid and which are defective in
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. If buyer is not intending to resell the products, and if
the products are consumer products as defined in the Magnuson-Moss Act, the foregoing
warranty, but not the limitation of seller's liability, shall be null and void. EXCEPT AS
EXPRESSLY STATED ABOVE, SELLER MAKES NO WARRANTY, EXPRESS OR
IMPLIED, WHETHER OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR
PURPOSE OR USE OR OTHERWISE, ON THE PRODUCTS, OR ON ANY PARTS OR
LABOR FURNISHED DURING THE SALE, DELIVERY OR SERVICING OF THE
PRODUCTS.

1-5 Precautions of Use and Installation

1. Side loading of the lifting screw is not permitted in the dynamic operation of the jack.
A limited side load is allowable in the static condition. Contact Joyce Dayton for the
allowable side load for a specific application.

2. Mechanical stops are not provided on the lifting screw unless requested. Therefore, it
is possible to drive the screw out of the jack sleeve (housing). It is the customer’s
responsibility to provide travel limit devices on all jacks. A mechanical stop, if
provided is only an auxiliary device to limit the travel of the lifting screw. Engaging a
mechanical stop during jack operation can cause damage to the internal jack
mechanism.

3. In most applications, factory or manufacturer-assisted installation is not required.
However, it is necessary that appropriate, qualified personnel perform the installation
of Joyce Dayton products.

4. Joyce Dayton jacks are not rated for shock-loading, extreme vibration or critical speed
conditions (high speed or long-length screw.) It is the responsibility of the user to
ensure these conditions are not imposed on a jack or the power transmission
equipment.

5. In the event that service or maintenance is required, the load must be secured or
removed before any work can begin.

6. The machine screw jacks can be mounted and operated in any orientation. When used
in a horizontal position, the worm should be below the gear to ensure proper
lubrication.

7. Never allow the jack to retract beyond the minimum closed position, as damage to the
jack can occur.

8. Boots or protective bellows covers should be used to protect and keep the lifting
screw clean in dusty or abrasive environments.

9. For continuous or high-duty cycles inquire with your local sales representative or
consult Joyce Dayton Corp. regarding Bevel Ball actuators.

1-6 General Installation instructions

1. Ensure that all personnel who will service or operate equipment are familiar with its
use and limitations.

2. Secure or remove the load before any installation procedures begin.

3. Be certain the rating of the jack meets or exceeds the load.

4. The jacks must be mounted on a structure sufficient to support the maximum possible
load. The structure must be rigid. An under-designed structure could lead to bending
of the lifting screw causing premature wear or failure.

5. Drive shaft alignment is critical. Mis-alignment will cause reversing stresses in
rotating members and will lead to fatigue failure. Correct coupling specification is
important.

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