5th WHEEL LANDING LEGS - Ultra

ULTRA‐FAB PRODUCTS
57985 State Road 19 S.
Elkhart, IN 46517
PH: (574) 294‐7571
FX: (574) 294‐4980
www.ultra‐fab.com
17‐943017
5th WHEEL LANDING LEGS
SUPER DUTY 4000 lbs / Landing Leg
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For your safety read all instructions before operating landing legs.
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INSTALLER: Provide these instructions to the consumer. CONSUMER: Keep documents for future reference.
NOTE: Ultra‐Fab 5th Wheel Landing Legs are intended for use on recreational vehicle 5th wheel‐type trailers only.
CAPACITY: Super‐Duty ‐ 4,000 lbs. per leg, 8,000 lbs. System. DO NOT EXCEED THIS CAPACITY
WARNING! TRAILER CAN MOVE OR COLLAPSE
WARNING! TRAILER CAN MOVE OR COLLAPSE
•Never exceed the rated capacity of 5th Wheel Landing Leg.
•LANDING LEGS ARE NOT DESIGNED TO BE USED AS TRAILER JACKS. Do not use the landing legs to lift the trailer during tire changes, axle
work or trailer servicing (the trailer weight will exceed the capacity of the landing legs). The landing legs are designed to stabilize a
portion of the trailers weight. Support the front end of the trailer with structural stands rated for the GVWR of the trailer.
•The pin between the ram and drop tube should be the same diameter as the adjustment hole in the drop tube. Otherwise premature
wear on drop tube and ram can occur.
INSTALLATION
1. Gear box can be oriented to three positions for different crank
handle locations.
2. Place gear box (FIG 1 #2) on the driver leg (FIG 1 #1) with the drive
‘D’ shaft box. Slip the collar (FIG 1 #3) over the drive ‘D’ shaft and
attach with screw (FIG 1 #4).
3 Assemble foot pad (FIG 1 #5) to drop tube with bridge pin clip (FIG 1
3.
#8), and clevis pin (FIG 1 #9).
4. Rotate drive shafts on both driver and driven legs to fully retract
landing legs.
5. Attach mounting brackets (FIG 1 #11) to legs using carriage bolts
and nuts. Torque bolts to 18‐20 ft.lbs. On each leg, position one
bracket above and one below mounting tabs formed in the landing
g
legg housing.
6. Position landing legs against frame in a vertical position. Locate foot
pads and lock pins for maximum ground clearance and to clear lower
edge of trailer.
7. Mark mounting bracket location on trailer frame. Weld mounting
bracket to trailer frame on both vertical sides and across either top
or bottom. DO NOT weld edges that contact mounting tabs and
landing legs.
NOTE: Use ⁵/₁₆
⁵/ ” fillet weld No.
No E6011 AWS wilding rod ⁵/₁₆
⁵/ ” diameter.
diameter Machine amps (AC or
DCRP) @ 160‐180 with 50 volts.
NOTE: Due to different frame configurations, it may be necessary to weld angle bracket to
lower part of frame to locate landing legs vertically.
8. Assemble the cross shaft, if used, by placing undrilled end of ¾”
square tube (FIG 2 #5) into open end of 1” square tube (FIG 2 #6) .
9. Attach both landing legs to frame. Fully retract both landing legs
before attaching cross shaft. Fasten drilled end of ¾” square tube to
end of shaft through gear box with ¼” x 1 ¼” long (FIG 2 #13) bolt
and lock nut. Bolt end of 1” square tube with insert (FIG 2 #9) to
shaft driven leg with ¼” x 1 ½”long bolt (FIG 2 #10) and lock nut.
10.Check operation of landing legs by inserting slotted end of handle
through alignment tube and engage the end of landing leg crank
shaft. Rotate crank handle counter‐clockwise. Check to see if both
legs are extending equally.
Optional Electric Drive Motor
1. The 12VDC electric drive motor must be installed on the inside of the gear box located on the same side of the trailer from which the
landing legs are now hand cranked (FIG 3 #12).
2. Put slotted coupling of motor over end of shaft on gear box (FIG 3
#12).
3. Secure motor to gear box with two ¼” dia. X 3½” long rounded
tapped holes in gear box.
box
(FIG 3 #16) slotted
head machine screws. Thread screws into the two
WARNING! EXPLOSION
WARNING! • Switch is not ignition protected. DO NOT install in areas which require ignition protected devices (such as battery or propane
tank storage compartments).
4. Choose panel or surface on which electrical switch will be mounted. Protect from environment by mounting inside an access door or
protected exterior surface. Cut and deburr hole in panel through which wires will pass. Protect wires from edge of hole by using
grommets or strain relief bushing (not furnished).
furnished)
WARNING! MOVING PARTS CAN CRUSH OR CUT
WARNING! •Switches must be located so operator can not operate landing legs and be in contact with moving parts of cross shaft or motor
at the same time.
5. For the single switch, cut either a rectangular hole or a 1⁵⁄₈” dia. hole. Pass wires through hole from front.
6 Remove fuse from fuse holder until installation is complete and all connections are made.
6.
made
7. Position panel with the gasket side against the mounting surface. It is recommended to use sealing screws to prevent moisture
intrusion.
Do not cut the wire tie located under the heat shrink tubing. Wires will spread and can pull off the terminals.
SINGLE SWITCH WIRING CHART
LENGTH ‐ WIRE COLOR
POINT OF TERMINATION
48” RED ‐ FUSE & HOLDER
+12VDC BATTERY TERMINAL
48” BLACK
CHASSIS GROUND OR ‐ BATTERY TERMINAL0
84” RED
RED MOTOR LEAD
84” BLACK
YELLOW MOTOR LEAD
NOTE: If vehicle has auxiliary battery, connect terminals to auxiliary battery so that landing leg may be used when connected to
115V. If additional wire is needed, use no smaller than #10 stranded copper wire.
8. After reinstalling fuse in system, check installation by moving switch to RET (retract) position to raise landing legs and EXT (extend)
position to lower legs.
OPERATION
WARNING! MOVING PARTS CAN CRUSH OR CUT
WARNING! •Keep hands and clothing away from moving parts.
WARNING! TRAILER CAN MOVE OR COLLAPSE
WARNING! • Never exceed rated capacity of landing legs – CAPACITY CHART.
• LANDING LEGS ARE NOT DESIGNED TO BE USED AS TRAILER JACKS. Do not use the landing legs to lift the trailer during tire
changes, axle work or trailer servicing (the trailer weight will exceed the capacity of the landing legs). The landing legs are
designed to stabilize a portion of the trailer
trailer’ss weight. Support the front end of the trailer with structural stands rated for the
GVWR of the trailer.
• Chock both sides of trailer wheels before operating landing legs.
• Both legs must touch the ground or the surface at the same time.
• Never drop the trailer off the hitch.
• Do not retract past the STOP label.
• Retract landing legs completely before towing trailer.
CAUTION! SECURE TRAILER BEFORE TRAVELING
CAUTION! • Secure latch hitch before raising landing legs.
• Apply trailer brakes and slowly pull the tow vehicle forward.
• The trailer should prevent the tow vehicle form moving.
• Lock pin spring clip must be positioned around landing leg and secured over end of pin on opposite side of leg tube. This
prevents pin from coming out during travel.
Manual Operation
TO EXTEND THE LANDING LEGS. Insert handle into alignment tube until end engages crank shaft. Turn handle counterclockwise until the
ram (the middle tube) is halfway to the ground. This will optimize the overlap of all tubes, thus minimizing trailer sway. Then remove
the pin in the drop tube or, if you have a pull pin that doesn’t remove, pull the handle pin so the pin is disengaged. Let the drop tube fall
to the ground and re‐pin n the nearest adjustment hole. Continue extending the landing legs until the pin box disengages from the hitch
and the weight of the trailer is completely removed from the hitch. When there is sufficient clearance between the pin box and hitch,
mo e tow
move
to vehicle
ehicle clear of trailer.
trailer Then lower
lo er the trailer until
ntil it is level,
le el side‐to‐side
side to side and back‐to‐front.
back to front Remove
Remo e and store the crank
handle.
TO RETRACT THE LANDING LEGS. Insert the handle into the alignment tube until the end engages the cross shaft. Turn the handle
clockwise until the trailer is engaged in the hitch of the tow vehicle. Remove pin or disengage the pull pin and raise the drop tube, re‐
pinning it in the highest position. Fully retract the legs so that the foot pad is higher than the lowest point of the trailer, to prevent
dragging while going over a curb. Do not extend the legs past the STOP label. Remove and store the handle.
Electric Motor Operation
CAUTION! POTENTIAL DAMAGE TO LANDING LEGS
• Do not retract the legs past the STOP label.
• At leg’s maximum extended or retracted length or maximum load, you will hear a clicking noise. This Is the slip clutch built into
the motor to prevent landing leg from over‐extension or over‐retraction.
• Release switch as soon as you hear the clicking. Continued operation with clutch slipping can damage legs.
TO EXTEND THE LANDING LEGS. Push switch to EXTEND position and hold until the ream (the middle tube) is halfway to the ground.
EXT and RET on the switches refer to the travel direction of the legs, not of the trailer. This will optimize the overlap of all tubes, thus
minimizing trailer sway. Pull the pin or disengage the pull‐pin and let the drop tube fall to the ground and re‐in in the nearest
adjustment hole. Continue extending the landing legs until the pin box disengages from the hitch and the weight of the trailer is
completely removed from the hitch. When there is sufficient clearance between the pin box and the hitch, move tow vehicle clear of
trailer. Move the tow vehicle clear of 5th wheel. Then lower the trailer until it is level, side‐to‐side and back‐to‐front.
TO RETRACT THE LANDING LEGS. Push switch to RETRACT position and hold until legs are fully retracted. Release the switch as the
clevis pin in the inner ram tube nears the end of the outside tube to avoid unnecessary wear on motor clutch. Do not extend the legs
past the STOP label. Remove lock pin and raise drop tube, re‐pinning it in highest possible position.
NOTE: Landing Legs may be operated with handle if electric drive motor is inoperative or if electricity is unavailable.
CAUTION! HANDLE COULD CAUSE INJURY
CAUTION! •Remove handle before using electric drive motor. Failure to do so will allow handle to jerk or spin around.
NOTE Before
NOTE:
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check
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MAINTENANCE
1. Before use, inspect drop tube and inner ram tube. Replace if bent or damaged.
2. ONCE EACH YEAR:
a. Extend landing legs as far as possible, clean drop tube and inner ram tube. Coat exposed surface of tubes with silicone spray
lubricant.
b. Coat inside of handle alignment tube with silicone spray lubricant.
c. Oil shaft busing in gear box and leg gear heads with SAE 30 oil.
d. Lubricate gears in gear box and landing leg gear heads with extreme pressure grease.
3. For Electric Drive Motor Landing Legs, twice each year, check wiring connections at battery. Clean terminals with a solution of baking
soda and water. Cover with a thin coat of grease.
4. The Electric Drive Motor Landing Leg system is protected by a 30 amp fuse. If replacement is necessary, replace only with a Buss Type
AGC‐30 fuse or equivalent, available in automotive supply stores.
5. The 3:1 gear box is not reparable. Do not take it apart. If you have a problem with the gear box, replace it.