Joyce DSWJ3225 - Manual (Page 3)

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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 specific applications.
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 stainless steel screw 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. Contact Joyce/Dayton Corp. for technical assistance.
5. In the event that service or maintenance is required, the load must be secured or
removed before any work can begin.
6. The stainless steel machine screw jacks can be mounted and operated in any
orientation. When used in a horizontal position, the worm should be mounted parallel
with the horizon and below the gear to ensure proper lubrication.
7. Never allow the jack screw 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. about other products suited for near-continuous duty
operation (i.e. Bevel Ball actuators, which are not stainless steel).
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.
6. In a system with shafts, miter boxes, etc., confirm that the shafts and jacks operate
without binding or excessive force before powered drive devices are engaged.