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• Hot water tank air cushion
• Maintain/restore air cushion; see Maintaining the Water Tank Air Cushion on page 8-18.
  • Page 8-18: Maintaining the Water Tank Air Cushion
    • The Alde boiler has an air cushion (air space) at the top of the hot water tank that must be maintained. The air cushion allows the water to expand when heated and absorbs any pressure shocks caused by the water pump in the heating system. Restore the system’s air cushion after 14 days of use. To restore the air cushion,
      • #1 turn off the fresh water pump and open the heating system safety/drain valve for a few seconds.
      • To open the valve, lift the lever upward until it rests in the vertical (open) position, as shown below.
    • Valve Access: The valve for the 28RB Classic is under the aft dinette seat.
• To access the valve, pull outward on the upholstered panel facing the isle to release it from the spring-loaded catches holding it in place

• Escape Window  – Check operation of latches and upper hinge.
• Smoke Alarm & CO Detector – Test and replace battery as required.
• Tires Check tire pressure; see Specifications on page 4-4.
  • page 4-4. 90 PSI (75)
• Hitch Check for loose bolts or unusual wear.
• GFI Circuit Breaker  – Test and record.
• Shower Door Sweep/Seal Inspect/clean/replace as needed; see Shower Door Sweep/Seal on page 5-4
  • page 5-4 – Shower Door Sweep/Seal – Models with a glass shower door have a sweep or seal at the bottom to help contain water within the shower. The door sweep is a commonly replaced item that requires periodic inspection and cleaning. The sweep will accumulate mold, mildew, and soap residue due to its location and the humid environment. This buildup can prevent the sweep from creating a good seal and may cause the seal to drag and tear. To prolong the lifespan of the sweep, clean it regularly, especially with increased shower use.

• Main Door Latch Lubricate with dry graphite
• Exterior Door Locks Lubricate with dry graphite.
• Exterior Hinges Lubricate with light household oil.
• LPG Hold-Down Lubricate with light household oil.
• LPG Regulator Check bottom vent for obstructions.
• Wheel Lug Nuts Torque to specifications; see Specifications on page 4-4.
• Lug nut torque (Max), aluminum wheels (ft lbs.) 110
• Breakaway Switch Pull pin and lubricate with household oil, see Breakaway Switch on page 8-10.
• page 8-10.
• 1 Pin
• 2 Breakaway Switch
• To prevent corrosion within the breakaway switch,the pin out and spray the inside of the switch throthe hole with an electric contact cleaner (such as Kleen). Applying a drop of light household oil on tpin and the groove near the base of the pin will all the pin to operate freely. Immediately reinsert the Perform this procedure every 90 days.
• 7-Way Plug Spray with contact cleaner.
• Hitch Ball Lubricate with hitch ball lube or wheel bearing grease.
• Range Exhaust Hood – Clean fan blades and wash filter.
• Main Door Step – Lubricate and inspect moving parts.

• Tires Inspect and rotate.
• Nev-R-Lube – Visually inspect wheel bearings at tire rotation. Refer to Dexter’s recommendation www.dexteraxle.com or call (574) 295-7888.
• Spare Tire Carrier – Lubricate moving parts.
• Windows, and Door Seals – Clean with mild detergent and apply 303 Aerospace Protectant.
• Exterior –  Wax.
• Escape Window Lubricate latches with silicone grease every 6 months or as needed.

• Brakes Inspect or replace as necessary every year or 12,000 miles; see Brakes on page 8-10.

  • page 8-10. – Brakes must be inspected and serviced immediately if performance loss is indicated. With normal use, servicing at 12-month or 12,000-mile intervals is usually adequate (whichever occurs first). With increased usage, this work should be done more frequently as required.

• Batteries Check terminals are secured.
• LPG Tanks Have purged by LPG supplier every year.
• Seams Check and reseal exterior seams, windows, lights, and vents as needed.
• Hitch Coupler and Ball – Ensure all parts operate freely. Replace any component if worn or damaged.
• Interior Cabinetry Visual Inspection of latches Locks, Hinges and Slides. Silicone Spray as needed.
• Power Jack Inspect and lubricate; see Power Jack on page 8-11

  • page 8-11 – Power Jack Maintenance Once a year, the powerhead should be removed, and a liberal amount of grease (preferably grease with a high melting point) applied directly to the coupling on which the drive pin rests. Do not pour oil into the top of the jack post.

  • Once a year, the housing cover should be removed and the gears inspected for proper lubrication. Remove all four screws and tap around the edge of the housing to free the cover. Do not use or insert a screwdriver blade to remove the cover, as it may damage mating surfaces. If lubrication is needed, use Mobilith SHCTM 460 or equivalent. Clean the mating surfaces before replacing the cover.

• Alde Glycol fluid Drain and replace.
• Use only Glycol recommended by Alde.

2026 28′ Classic Manual