Motorhome and RV Levelling Systems: Safe Setup Guide

Quick answer: Level a motorhome or RV using the equipment and sequence approved for that exact vehicle. Wheel ramps and blocks support tyres; hydraulic or electric levelling systems act through designated jacks; stabilisers reduce movement after levelling. These devices are not interchangeable, and stabiliser jacks must not be used to lift the vehicle.

Always use the vehicle and levelling-system manuals. Instructions differ between motorhomes, caravans, travel trailers and fifth wheels, especially for slide-outs, engines, parking brakes and the order in which jacks operate.

Levelling Versus Stabilising

A levelling or stabilising system is not automatically safe support for tyre changes, inspection or work beneath the RV. Never crawl under a vehicle supported only by its levelling jacks.

Why Level the RV?

• More comfortable sleeping, cooking and walking.
• Correct drainage from sinks, showers and condensate systems.
• Reliable door, cabinet and slide-out alignment.
• Operation within the limits stated for installed appliances.
• Reduced rocking when approved stabilisers are used.

Older absorption refrigerators can have model-specific levelling limits; compressor refrigerators are less sensitive. Check the actual appliance manual rather than assuming every fridge needs the same tolerance.

Choose the Pitch Before Using Equipment

Levelling equipment cannot make every pitch suitable. Look for firm ground, adequate clearance and a slope within the system’s operating range. Avoid soft verges, drains, voids and surfaces where blocks or jack feet can slip.

• Check overhead and side clearance.
• Keep the vehicle within the pitch boundary.
• Consider the direction of doors, steps, awnings and slide-outs.
• Check whether the site permits jack pads or requires load-spreading boards.
• Relocate if the system would need excessive stroke or create an unsafe tyre position.

Wheel Ramps and Levelling Blocks

Ramps and interlocking blocks raise one or more tyres while preserving tyre support. Confirm their load rating, width and compatibility with single or twin wheels.

1. Assess which side or axle needs raising.
2. Place the ramp on firm ground with a clear approach.
3. Use a spotter where visibility is restricted.
4. Drive slowly and stop at the required level.
5. Apply the parking brake, select the specified gear or park position and chock as required.

Do not stack loose timber or improvised materials that can split, slide or tip. Avoid leaving part of a tyre unsupported over a narrow block.

Hydraulic and Electric Automatic Levelling

An automatic system uses sensors and a programmed sequence to move approved jacks. It may level accurately, but it still depends on suitable ground, adequate battery voltage, correct calibration and available jack travel.

• Follow the required engine, ignition and parking-brake state.
• Keep people clear of the vehicle and jack area.
• Use rated pads where the manufacturer permits or requires them.
• Stop if a foot slips, sinks or reaches excessive extension.
• Do not repeatedly auto-level to overcome a poor pitch.
• Confirm every jack is fully retracted before travel.

Some approved systems may lift a wheel in certain circumstances; others must not. Do not use a generic rule. Follow the exact system and chassis instructions.

Manual Levelling Jacks

Manual control can correct a difficult angle but also makes it easier to twist the chassis or overload a jack. Move in small increments, watch the whole vehicle and observe the manufacturer’s sequence and stroke limits.

Do not fully extend a jack simply because travel remains. More extension reduces reserve and can increase side loading. If the system reports out-of-stroke, retract safely and reposition the RV or use approved pads as instructed.

Stabiliser Jacks and Steady Legs

Stabilisers are normally deployed after the RV is level. Bring them into contact using the specified method and load; do not use them to raise the vehicle or carry its total weight.

Excess force can damage the stabiliser, frame or slide-room alignment. Retract all stabilisers before changing level, operating another jack system or moving the RV.

Jack Pads and Load Spreading

A jack concentrates substantial load into a small area. A suitable pad can reduce sinking and protect some surfaces, but it must be rated, stable and large enough for the foot. Keep the jack foot centred and never place hands beneath a loaded jack.

Thin, cracked or slippery boards can fail suddenly. Do not build a tall stack that allows the foot to kick out.

Slides and Levelling Order

The correct sequence varies. Many vehicles must be level before extending slide rooms; some systems require slides retracted before levelling or re-levelling. Use the owner manual, not a general campsite habit.

Do not place aftermarket supports beneath a slide room unless the manufacturer expressly approves them. See the RV slide-out support guide.

Air Levelling and Suspension

Some motorhomes can level through air suspension, hydraulic jacks or a combination. Air systems may have travel-height, dump and re-inflation procedures that are critical before driving. Never work beneath an air-suspended vehicle without the specified mechanical support because suspension can lower unexpectedly.

Safe Setup Checklist

1. Read the vehicle and levelling-system instructions.
2. Choose firm ground within the permitted slope.
3. Apply the parking brake and chock as required.
4. Check people, pets and obstacles around the vehicle.
5. Set the required engine, ignition and power condition.
6. Position approved ramps, blocks or pads.
7. Level using the specified sequence.
8. Deploy stabilisers only after levelling if applicable.
9. Check doors, steps, services and slide clearance.
10. Recheck for sinking after occupants and tanks change load.

Before Driving Away

• Retract the awning and slide-outs in their approved sequence.
• Retract every stabiliser and levelling jack fully.
• Remove and store all pads, blocks and chocks.
• Confirm travel-height or suspension indications.
• Walk around the entire vehicle before moving.

Troubleshooting

The RV will not reach level

The pitch may exceed the system range, a jack may be sinking or the zero point may be incorrect. Do not continue extending. Retract safely and reposition or follow the system’s diagnostic procedure.

A jack will not retract

Keep the vehicle stationary and follow the manufacturer’s emergency-retraction instructions. Hydraulic leaks, damaged wiring and manual overrides require system-specific handling.

The vehicle rocks after levelling

Confirm approved stabilisers are deployed correctly and pads have not settled. Do not add force beneath slide rooms or unapproved frame points.

The auto-level result feels wrong

Check with a level at the location specified by the manufacturer. Recalibrate only through the documented procedure.

Related Guides

• Caravan levelling ramps
• RV slide-out supports
• Motorhome payload and axle weights
• RV travel safety checklist

Manufacturer references: Lippert’s motorized levelling manual states that its system is for levelling and not for service beneath the coach. The Forest River towable owner manual distinguishes stabilising from lifting and warns against using stabilisers to support the trailer’s total weight.

Last updated: June 2026.