The 1995 Spartan motorhome chassis is a rugged foundation used in many high-end diesel pusher RVs. A key component of its ride quality and load-leveling ability is the air suspension system. Over time, parts like air springs, leveling valves, and compressors wear out and need replacement. This guide covers everything you need to know about 1995 Spartan motorhome chassis air suspension parts, including identification, sourcing, and installation tips.
Understanding the 1995 Spartan Motorhome Chassis Air Suspension System
The air suspension on a 1995 Spartan chassis uses pressurized air to support the vehicle's weight and absorb road shocks. Unlike traditional leaf springs, air suspension offers adjustable ride height and better comfort. The system typically includes:
- Air springs (air bags) – rubber bellows that inflate to support the load.
- Leveling valves – mechanical or electronic valves that regulate air pressure to maintain ride height.
- Air compressor – supplies compressed air to the system.
- Air dryer – removes moisture from compressed air to prevent freezing and corrosion.
- Air lines and fittings – connect components.
- Height control sensors – on later systems, but on 1995 models, leveling valves are often purely mechanical.
Common Air Suspension Disorders
Symptoms of failing air suspension include a sagging rear end, bottoming out over bumps, hissing sounds from air leaks, or the compressor running constantly. If you notice these, inspect the air bags and valves first.
Common Air Suspension Parts for the 1995 Spartan Chassis
When replacing parts, you need exact specifications because Spartan used different suppliers over the years. The most common failure points are:
Air Springs / Air Bags
The air bags on a 1995 Spartan are typically double convoluted or triple convoluted bellows. They are often manufacturer-specific (e.g., Firestone, Goodyear, or ContiTech). Common part numbers include Firestone 1T12D-3 or Goodyear 11R22.5 equivalents. Always measure the collapsed height, diameter, and attachment style before ordering.
Leveling Valves and Height Control
Leveling valves control the ride height. On 1995 Spartans, you'll usually find three valves: one for each rear axle and one for the front. Popular replacements include Haldex KN50–23 or the OEM Spartan part. Adjusting the linkage is crucial for correct ride height.
Air Compressor and Dryer
Spartan often used a WABCO or Bendix compressor. The compressor may be engine-driven or electric. The air dryer is usually a desiccant type that needs replacement every 2–3 years. Part numbers vary by engine setup; check your chassis serial number.
Fittings, Lines, and Solenoids
Leaks often occur at O-rings and push-to-connect fittings. Use DOT-approved brass or nylon fittings. Replace any cracked plastic air lines with compatible nylon tubing.
How to Identify the Correct Parts for Your 1995 Spartan
To avoid buying the wrong parts, follow these steps:
- Locate the chassis tag – mounted on the left frame rail near the steering gear. It lists the model number (e.g., Spartan K2, K3). Write this down.
- Check the VIN – the 4th to 8th digits often encode chassis details.
- Measure existing air bags – deflate them, then measure the height from mounting plate to piston, along with diameter and number of bellows folds.
- Note valve markings – leveling valves usually have a brand and serial number.
Most reputable suppliers will ask for these details before quoting parts.
Where to Find 1995 Spartan Motorhome Chassis Air Suspension Parts
OEM vs Aftermarket Options
OEM parts from Spartan (now part of REV Group) can be expensive and slow to source. Aftermarket alternatives from quality brands offer similar performance at lower cost. Preferred aftermarket brands include:
- Firestone Industrial Products – makes direct replacements for many Spartan air bags.
- Goodyear (now owned by ContiTech) – offers air springs for heavy-duty trucks.
- Ridewell Corporation – suspension specialist with aftermarket components.
- Haldex – for leveling valves and air dryers.
Specialized RV and Truck Suspension Suppliers
Check with:
- Source Engineering, Inc. – stocks hard-to-find Spartan parts.
- TruckSpring – good for air bags and valves.
- Air Lift Company – sells upgrade kits that work with Spartan chassis.
- Local heavy-duty truck suspension shops – they can often source parts quickly.
Always verify that aftermarket parts are rated for the GVWR of your motorhome.
Installation Tips for 1995 Spartan Air Suspension Parts
If you're handy with tools, you can replace many air suspension parts yourself. However, heavy components like air springs require proper jacking and safety.
Safety Precautions
- Always support the chassis with jack stands at the frame – never rely on air bags alone.
- Chock the wheels securely.
- Depressurize the system by opening a drain valve or disconnecting the air line at a low point.
- Wear safety glasses when working with compressed air.
Tools Needed
- 1/2-inch drive socket set and wrenches
- Torque wrench
- Air hammer or chisel for stubborn bolts
- Pry bar
- Thread locker (Loctite 242)
- Silicone lubricant for air bag mounts
Step-by-Step Rear Air Bag Replacement (General)
- Raise the rear of the motorhome and support the frame on jack stands.
- Remove the wheels on the side you’re working on.
- Deflate the air bag completely.
- Disconnect the air line at the bag. Unbolt the bag from the top mount and lower bracket.
- Clean the mounting surfaces.
- Install the new bag with new bolts and a small amount of thread locker. Torque to manufacturer specs.
- Reconnect the air line – check for debris.
- Inflate the system and check for leaks using soapy water.
- Adjust the leveling valve linkage if necessary.
For leveling valve replacement, disconnect the linkage, remove the valve, install the new one, and adjust the arm so the bracket is horizontal at the desired ride height (typically 7–9 inches from bumper to ground, but consult your owner’s manual).
Maintenance to Extend the Life of Your Air Suspension
- Check air bags monthly for cracks or chafing.
- Lubricate leveling valve linkages annually.
- Replace the air dryer desiccant every 3 years.
- Drain air tanks daily to remove condensation.
- Fix small leaks immediately – they cause compressor burnout.
Final Recommendation
For 1995 Spartan motorhome chassis air suspension parts, prioritize quality over price. Air bags from Firestone or Goodyear are recommended. Always buy from a supplier that specializes in RV or heavy-duty truck suspension. If you’re unsure, consult a Spartan chassis expert – they can cross-reference your chassis serial number to get you the exact part. Replacing worn air suspension parts restores ride comfort and prevents further damage to the coach.