RV Liquid Spring Adjustment Guide: Setup & Tuning Tips

Quick Take

Yes, you can absolutely adjust just the rear LiquidSpring struts on your 2022 Tiffin Open Road 34PA independently of the front ones. The LiquidSpring system is designed with individual corner control, allowing you to raise or lower each corner or axle separately using the control panel inside your coach. For your Class A motorhome, the rear adjustment is particularly useful for leveling when parked or compensating for rear-heavy loads like a full fresh water tank or loaded cargo bay.

Common Causes

On your 2022 Tiffin Open Road 34PA, the most common reasons for needing rear-only adjustments include uneven campsite surfaces where only the rear needs leveling, rear-heavy loading from full tanks or cargo, and seasonal weight distribution changes. The rear struts handle the majority of your RV's living space weight, including the bedroom, bathroom, and often the kitchen slideouts.

LiquidSpring systems are designed to maintain consistent performance across temperature ranges, though some owners make minor adjustments based on personal preference for ride height. Additionally, some owners find they need to adjust the rear slightly higher when hitching or unhitching a towed vehicle to ensure proper weight distribution and maintain the factory-recommended nose-down attitude for better handling.

Preparation

Before making any adjustments to your rear LiquidSpring struts, ensure your 2022 Tiffin is parked on the most level surface available and engage the parking brake. Turn on your house batteries and locate the LiquidSpring control panel, which should be mounted on your dashboard or in the driver's area - Tiffin typically installs these near the other chassis controls.

Check that all slides are in their normal camping position and that your fresh water tank is at its typical travel level, as these significantly affect weight distribution. Have your owner's manual handy, as Tiffin may have specific height recommendations for your 34PA model. It's also wise to measure your current ride height at all four corners before making changes, so you can return to the original settings if needed.

Repair Steps

Start the engine or ensure your chassis batteries are fully charged, as the LiquidSpring system requires adequate power to operate the electronic control system and valves. On your control panel, you should see individual corner controls or front/rear axle controls - select the rear axle option.

To raise the rear, press and hold the rear "up" button in short bursts, typically 2-3 second intervals, allowing the system to respond between adjustments. Do not exceed the manufacturer's maximum adjustment limits to avoid system damage or stability issues. The LiquidSpring system moves gradually, so patience is key. To lower the rear, use the rear "down" button in similar short bursts. Monitor the rear of your coach visually or use a level to gauge the changes.

For your 34PA, small adjustments usually yield noticeable results due to the motorhome's length and leverage. Make incremental changes and test the results by walking through your coach to check for proper leveling. The rear bedroom and bathroom areas are good indicators of whether you've achieved the desired level.

Once you've reached the desired height, turn off the adjustment system and allow it to settle for a few minutes. The LiquidSpring system will automatically maintain the set height through its electronic control system.

When to Get Help

Contact a Tiffin service center or LiquidSpring dealer if your rear struts won't respond to the control panel commands, if you hear unusual grinding or mechanical noises during adjustment, or if one rear corner behaves differently than the other. These symptoms could indicate internal strut problems or control system malfunctions that require professional diagnosis.

Also seek professional help if your 2022 Tiffin won't maintain the adjusted rear height or shows error codes on the control panel, as this suggests internal strut problems or control system issues. Given that your coach is relatively new, any major issues should still be covered under warranty through Tiffin or LiquidSpring, so document any problems and contact your dealer promptly to avoid potential warranty complications.