atwood Landing Legs User Manual

LITERATURE NUMBER

MPD 71125

5TH WHEEL LANDING LEGS &

REAR LEVELERS

STANDARD DUTY 2000 lbs / Landing Leg

ENGLISH •Installation •Operation •Maintenance

SAFETY ALERT SYMBOLS

Safety Symbols alerting you to potential personal safety hazards. Obey all safety messages following these symbols.

 WARNING  CAUTION

avoid possible avoid possible injury or death injury and/or property damage

For your safety read all instructions before operating landing legs.

Installer: Provide these instructions to the consumer. Consumer: Keep documents for future reference.

FIGURES ARE LOCATED ON PAGE 5 OF THIS MANUAL

NOTE: Atwood 5th Wheel Landing Legs are intended for use on recre-

ation vehicle 5th wheel-type trailers only.

CAPACITY

DO NOT EXCEED THESE CAPACITIES

Heavy-Duty

Super-Duty

Direct Drive

Square Tube Leveler

Manual Electric Electric

Electric

Electric Electric

Electric

▼▼

with gear box

▼▼

3,000 lbs. per leg, 6,000 lbs. system 2,500 lbs. per leg, 5,000 lbs. system

쇵

3,000 lbs. per leg, 6,000 lbs. system

쇵쇵

4,000 lbs. per leg, 8,000 lbs. system

쇵쇵

4,000 lbs. per leg, 8,000 lbs. system

쇵쇵

5,000 lbs. per leg, 10,000 lbs. system

쇵쇵

7,500 lbs. per leg, 15,000 lbs. system

쇵쇵

single motor

쇵

dual motor

쇵쇵

 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 landings 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’s 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 must be the same diameter as the adjustment hole in the drop tube. Otherwise premature wear on drop tube and ram will occur.

Front Landing Legs and Direct Drive Legs

1. LANDING LEGS: Assemble the 3:1 Gear Box to leg.

NOTE: The Direct Drive legs do not use the 3:1 gear box.

Gear box can be oriented to three positions for different crank handle locations. Place gear box on the driver leg with the drive ‘D’ shaft

FIG 1-A) through the ‘D’ diameter of large gear in gear box

(

FIG 1-B). Slip the collar (FIG 1-C) over the drive ‘D’ shaft.

(

2. LANDING LEGS: Assemble foot pad (FIG 2-A) to drop tube (FIG 2-B) with bridge pin clip (FIG 2-C) and clevis pin (FIG 2-D). For Standard and Heavy Duty Landing Legs, assemble drop tube to ram (FIG 2-E) in a fully retracted position using lock pin ( drop tube to ram with the ball detent pin (FIG 2-G). Mount footpad with its length running from front to rear of the 5th wheel trailer.

NOTE: Optional spring-loaded pull pins are available to replace 2-F or

2-G. There must be a half-hole at the bottom of the ram in order to use the pull pin. If using a pull-pin, assemble it to the ram per its instruction manual. Use only the legs (FIG 2-H).

DIRECT DRIVE: Assemble the round foot pad (FIG 2-I) to the ram

(FIG 2-J) with the supplied pin (FIG 2-K).

3. Rotate drive shafts on both driver and driven legs to fully retract landing legs.

4. Attach mounting brackets ( nuts (FIG 3-B). Torque bolts to 18-20 ft.lbs. On each leg, position one bracket above and one below mounting tabs (FIG 3-C) welded to landing leg housing.

5. Position legs against frame in a vertical position. Legs should not be more than 1/4˝ out of parallel with each other. Locate foot pads and lock pins for maximum ground clearance and to clear lower edge of trailer.

6. Mark mounting bracket location on trailer frame. Weld mounting bracket to trailer frame on both vertical sides and across either top or bottom ( on landing legs.

NOTE: Use 5/16˝ fillet weld No. E6011 AWS welding rod 5/16˝ 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 tubing to upper and lower part of frame to locate landing or direct drive legs vertically and plumb (FIG 4-A).

7. LANDING LEGS: Assemble the cross shaft, if used, (FIG 3-E), by placing undrilled end of 3/4˝ square tube into open end of 1˝ square tube.

8. Attach both legs to frame. Fully retract both legs before attaching cross shaft. square tube and composite gear box.

9. LANDING LEGS: For leg sets with a cross shaft, fasten drilled end of 3/4˝ square tube to end of shaft through gear box with 1/4˝ x 11/8˝ long screw and lock nut. Bolt end of 1˝ square tube to shaft of

FIG 3-D). DO NOT weld edges that contact mounting tabs

LANDING LEGS: Place the collar (FIG 1-C) between the 3/4˝

HEAVY DUTY 3000 lbs / Landing Leg

SUPER DUTY 4000 lbs / Landing Leg DIRECT DRIVE 4000 lbs / Landing Leg DIRECT DRIVE 5000 lbs / Landing Leg

LEVELER 7500 lbs / Leveler

Effective 3/14/08

INSTALLATION

FIG 2-F). For Super Duty, assemble

SNAPS

pull pin on the Super Duty

FIG 3-A) to legs using carriage bolts and

driven leg with 1/4˝ x 1-1/8˝ long screw and lock nut. To prevent rattle between tubes, tack weld 1˝ square tube to 3/4˝ square tube (FIG 3-F).

NOTE: Two motor landing leg sets may not need an outside access

10. point for the manual override if you orient the legs so the drive shaft faces forward (toward the compartment door) or inward.

Mark location for hand crank hole through frame (FIG 5-A) and side

FIG 5-B) and drill 1-3/32˝ minimum diameter hole for structural

wall ( composite flange alignment tube (FIG 4-B & FIG 5). Slide alignment tube (FIG 5-C) through hole and over drive pin in crank shaft until it contacts the gear box (FIG 5-D or 1-B). Attach flange (FIG 5-E) of alignment tube to side wall with the three #8 sheet metal screws. If flange does not contact the side wall, shorten alignment tube to allow a flush fit. Use a tube cutter to shorten tube. Orient the weep hole on the flange so it is on the bottom.

NOTE: On open frame trailers, build a bracket to hold the alignment tube

(FIG 3-G).

11. 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.

Electric Drive Motor

NOTE: Use the Atwood Electric Motor on Atwood 5th Wheel Landing

Legs only. Do not use on other manufacturer’s legs. The Direct Drive legs already have the motor installed.

LANDING LEGS: 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 1). Two motor sets will have a motor on each leg.

2. Put slotted coupling of motor over end of shaft (

3. Secure motor to gear box with two 1/4˝ dia. x 3-1/2˝ long rounded slot-

ted head machine screws ( holes in gear box. Use lock washers (

FIG 1-D). Thread screws into the two tapped

FIG 1-E) under screw heads.

FIG 1-A) on gear box.

5/16-18 bolt and nut. Put 3/8˝ carriage bolts and nuts on cross brace brackets and tighten to 20 ft-lbs. Insure lower brackets do not prevent landing leg from fully retracting. Tighten all 5/16-18 nuts to 12 ft-lbs.

6. Consult MPD 87920 for wiring instructions and integration with remote controls.

Controls

REMOTE CONTROL 2-motor and 4-motor Remote Control Systems are available to use in place of switches. Installation and Operation instructions refer to MPD 87920.

SWITCHES

 WARNING

EXPLOSION

• Most switches are not ignition protected. DO NOT install these in areas which require ignition protected devices (such as battery or propane tank storage compartments). Only the Ignition Protected Switch is approved for installation in these compartments.

1. Choose a smooth, flat surface on which to mount the electrical switch. 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). Installing the switch on an uneven surface (for example “Mesa” aluminum siding) can cause binding between switch panel and switch. This binding can cause switch to stick. Make sure the switch panel does not bind or pinch the switch body.

 WARNING

MOVING PARTS CAN CRUSH OR CUT

• 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.

 WARNING

VEHICLE CAN MOVE OR COLLAPSE

• Never exceed the rated capacity of the leveler as stated on its label.

• Levelers are not designed to be used as jacks. Do not use levelers to lift the vehicle during tire changes, axle work or other servicing. The tires must stay on the ground.

Leveler Leg

1. Prior to installation, retract the levelers so the foot pads are within 1/2˝ to 1˝ from the end of the outer housing (FIG 6-A).

2. Position leveler vertically against frame so base of foot is above the departure angle when vehicle is loaded to its maximum GVWR (FIG 6- B). The departure angle is an imaginary line between the bottom of the tires and the bottom of the rear bumper.

FOR SQUARE TUBE LEVELEGS

FIG 6-F). Fit the Leveleg bracket (FIG 6-G) around the Leveleg, engag-

( ing one tab below the bracket ( bracket (FIG 6-K). Attach the Leveleg bracket to the frame bracket with a 3/8˝ carriage bolts and 3/8˝ nuts.

4. Lubricate the bolts and torque to 20 ft-lbs.

CROSS BRACE ATTACHMENT - Attach top cross brace brackets (FIG 6-L) to

5. each landing leg under the tab on the landing leg using 3/8˝ carriage bolts and 3/8˝ nuts and torque to 20 ft-lbs. Have top cross brace brackets facing opposite directions. Attach each cross brace tube to each attached bracket using the 5/16-18 bolts and nuts. Do not tighten the bolts and nuts. Let the other ends of the tubes rest on the foot of the opposite landing leg. Put 5/16-18 bolt thru center of cross brace tubes and put the nut on the bolt, but do not tighten. Place lower cross brace bracket ( site direction as the top cross brace bracket that is on that landing leg. Slide the lower bracket up and attach the cross brace tube end to the cross brace bracket with

, weld the frame bracket (FIG 6-E) to frame

FIG 6-J) and the other tab above the

FIG 6-M) on landing leg facing the oppo-

2. For the single switch, cut either a rectangular hole or a 1-5/8˝ dia. hole. For the three switch panel, cut a 5-1/2˝ wide by 2-3/4˝ tall opening. Pass wires through hole from front.

3. Remove fuse from fuse holder until installation is complete and all connections are made.

4. 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.

LANDING GEAR SINGLE SWITCH WIRING CHART

LENGTH - WIRE COLOR POINT OF TERMINATION

48˝ RED - FUSE & HOLDER +12VDC BATTERY TERMINAL

˝ BLACK CHASSIS GROUND OR - BATTERY TERMINAL

48 84˝ RED RED MOTOR LEAD 84˝ BLACK YELLOW MOTOR LEAD

LANDING GEAR THREE SWITCH WIRING CHART

LENGTH

WIRE COLOR

24˝ RED + DRIVER MOTOR RED MOTOR LEAD OF DRIVER SIDE LANDING LEG 24˝ BLACK - DRIVER MOTOR YELLOW MOTOR LEAD OF DRIVER SIDE LANDING LEG 24˝ BLACK BATTERY GROUND CHASSIS GROUND OR - BATTERY TERMINAL 24˝ RED +12 VDC BATTERY POSITIVE +12 VDC BATTERY TERMINAL 24˝ BLACK - PASSENGER MOTOR YELLOW MOTOR LEAD OF PASSENGER SIDE LANDING LEG 24˝ RED + PASSENGER MOTOR RED MOTOR LEAD OF PASSENGER SIDE LANDING LEG

DIRECT DRIVE LANDING GEAR THREE SWITCH WIRING CHART

LENGTH

WIRE COLOR

24˝ RED + DRIVER MOTOR YELLOW MOTOR LEAD OF DRIVER SIDE LANDING LEG 24˝ BLACK - DRIVER MOTOR RED MOTOR LEAD OF DRIVER SIDE LANDING LEG 24˝ BLACK BATTERY GROUND CHASSIS GROUND OR - BATTERY TERMINAL 24˝ RED +12 VDC BATTERY POSITIVE +12 VDC BATTERY TERMINAL 24˝ BLACK - PASSENGER MOTOR RED MOTOR LEAD OF PASSENGER SIDE LANDING LEG 24˝ RED + PASSENGER MOTOR YELLOW MOTOR LEAD OF PASSENGER SIDE LANDING LEG

WIRE NOMENCLATURE POINT OF TERMINATION

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.

Electric Motor Operation

OF FRONT LEGS, USING SWITCHES

5. After reinstalling fuse in system, check installation by moving switch

RET (retract) position to raise landing legs and EXT (extend) posi-

to tion to lower legs.

OPERATION

 WARNING

MOVING PARTS CAN CRUSH OR CUT

• Keep hands and clothing away from moving parts.

 WARNING

TRAILER CAN MOVE OR COLLAPSE

• Never exceed rated capacity of landing legs. See CAPACITY CHART.

• LANDING LEGS ARE NOT DESIGNED TO BE USED AS TRAILER JACKS. Do not use the landings 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’s 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.

• Do not extend slideouts until trailer is level.

 CAUTION

SECURE TRAILER BEFORE TRAVELING

• Securely latch hitch before raising landing legs.

• Apply trailer brakes and slowly pull the tow vehicle forward.

• The trailer should prevent the tow vehicle from 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 (

FOR SUPER DUTY LANDING LEGS insure the ball detent pin is

• fully extended through the leg (FIG 2-G).

Manual Operation of Front Landing Legs - REFER TO FIG

TO EXTEND THE LANDING LEGS, insert handle into alignment tube until

end engages crank shaft. Turn handle or drill adapter 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 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 hitch, move tow vehicle clear of trailer. Then lower the trailer until it is level, side-to-side and back-to-front. Remove and store the crank handle.

TO RETRACT 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.

FIG 2-F).

 CAUTION

POTENTIAL DAMAGE TO LANDING LEGS

• When using power tools to drive system, do not over extend or retract system. Over extension or retraction can damage 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.

 CAUTION

POTENTIAL FRAME DAMAGE TO TRAILER

• DUAL MOTOR APPLICATION - when raising or lowering trailer, front of trailer must remain horizontal.

TO EXTEND THE LEGS, push switch to EXTEND position and hold until

the ram (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. For just the landing legs, pull the pin or disengage the pull-pin and let the drop tube fall to the ground and re-pin 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 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 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 retract the legs past the STOP label. For Landing Legs only, remove lock pin and raise drop tube, re-pinning it in highest possible position.

NOTE: Landing Legs may be operated with override handle if electric

drive motor is inoperative or if electricity is unavailable.

 CAUTION

HANDLE COULD CAUSE INJURY

• Remove handle before using electric drive motor. Failure to do so will allow handle to jerk or spin around.

3. Before towing, check that the landing legs are within the angle of departure. The angle of departure is an imaginary line between the trailer tires and the rear bumper of the tow vehicle.

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