ULINE Trailer Jack H-1544 User Manual
- June 7, 2024
- ULINE
Table of Contents
H-1544 TRAILER JACK
50,000 LB CAPACITY
1-80 0 -295 -5510
uline.com
SAFETY
WARNING : Improper or careless use of this product might result in
death or serious personal injuries sustained by the operator and bystanders.
Failure to read and understand this manual before using or servicing a
trailer-stabilizing jack is misuse. Any person who will use or maintain this
product must be
familiar with all instructions and warnings in this manual.
-
DO NOT perform maintenance on or repair a loaded (in use) jack.
-
DO NOT use this product unless all labels are in place and legible.
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DO NOT use a stabilizing jack if it is damaged.
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ONLY use the stabilizing jack on compacted, improved surfaces (i.e. concrete) that are even and level. This product will not stabilize trailers parked on
uneven or sloped ground. -
DO NOT use a stabilizing jack to support trailers. This jack is designed to stabilize trailers that are supported by landing gear (trailer dolly jack). NEVER use a
stabilizing jack without deployed landing gear in normal condition. -
ONLY qualified maintenance personnel should maintain and repair this product. Improperly maintained stabilizing jacks might become unsafe to use.
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DO NOT modify a trailer-stabilizing jack in any way.
OPERATION
The trailer-stabilizing jack is intended to be used to support the ends of a
semitrailer that is parked against a loading dock and not connected to a
truck’s fifth wheel. The semitrailer must be situated on a flat, stable,
improved (preferably concrete) surface.
The load rating in pounds is shown on the information label located on the
side of the jack. Two ratings appear on the label: a static rating – how much
weight the jack will stabilize; and a lifting rating – how much weight the
screw mechanism of the jack can lift.
NOTE: The need to use trailer-stabilizing jacks, the number necessary and
the exact placement of jacks under the semitrailer must be determined by a
qualified person responsible for the loading or unloading of the trailer.
WARNING: Improper or careless use of this product might result in death or
serious personal injuries sustained by the operator
and bystanders.
OPERATION CONTINUED
Before installing stabilizing jacks beneath a semitrailer:
- It must be entirely and stably supported by its landing gear.
- The trailer wheels must be properly immobilized to resist creep or roll.
- The surface on which the jack(s) will be used must be even, level, compacted and improved (concrete) to prevent the jack from sinking into the ground.
- Confirm that the underside of the trailer is sound where the stabilizing jack(s) will contact it. If the point of contact is unsound, the jack might break through the trailer.
- DO NOT exceed the load ratings. To raise and lower the top cap: utilize handles that are affixed to the screw hub.
Lift and place stabilizing jack under the hitch-end (front) of the semi-
trailer. If using a single jack, place it on the centerline of the trailer’s
width. When using two jacks, place one under each front corner.
NOTE: Additional stabilizing jacks might be required under the rear corners
of the semitrailer if the distance from the rear axle to the back end of the
semitrailer is more than 1⁄4 of the overall length of the trailer.
Adjust the height of the jack so that the top cap of the jack presses firmly
against the underside of the semitrailer frame. However, the trailer landing
gear must
at all times remain in solid contact with the ground in order to provide
support for the front end of the trailer Jacks must be removed before backing
a tractor underneath the semitrailer. To remove a trailer jack, lower the top
cap so that it no longer contacts the bottom of the trailer; then, tip the
jack backward and
roll it out from under the trailer.
0721 IH-1544
1-80 0 -295 -5510
uline.com
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