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Class-A RV Scheduled Maintenance - Brakes & Hydraulics

Part 3

Maintenance Part 3 - Spartan Chassis Banner Photo

The following are Spartan Maintenance Guidelines for some of the more common Systems found in many of today's Motorhomes. This section covers Suspension, axles, cooling system, hydraulic systems, and tire maintenance.

Caution: The maintenance recommendations on this page are meant as general guidelines only. Always consult with a professional RV mechanic, your owner's manual, and/or your authorized RV dealer BEFORE performing any maintenance procedures or safety checks. See 'Legal Disclaimer' below.

Chassis & Suspension Systems

Air Suspension - Reyco Granning

Air Suspension

  • Reyco Air Suspension: Torque on the suspension hardware should be rechecked at 1,000 to 3,000 miles
  • Granning IFS (Independent Front Suspension): Lubricate every 50,000 miles or once a year

Air Suspension: (Important) Ride height should be checked at every oil change. Incorrect ride height will affect front end alignment and rear driveline angles. Ride height tolerance: +/- 1/8 inch



  • Wheel Seal Oil Level: Fill to oil-fill line on hub oiler
  • Lube Type: 80-90 Gear Oil
  • Service Interval: Change lube every year

Meritor Rear Axles:

  • Fluid Type: 85W140
  • Model # RS-19-145: Capacity: 33.2 pints
  • Model # RS-23-160: 41-43 pints (Oil level should be level with bottom of fill hole plug.)

Air Brake System

Air Brake System

  • Air Dryer Type: Wabco
  • Filter: R9500 11
  • Service Interval: 2-3 years for preventative maintenance

Check tanks: If water is present and change filter (likely contaminated) Remove moisture in the air reservoir by opening the petcocks or valves every time you fuel up. Once a month auto moisture ejectors.

Additional Wabco Info: Go to: Brake System Air Dryer Filter Maintenance

Brake Adjustment Info: Go to: Air Brake System Adjustment

Hydraulic System

Hydraulic System

  • In Tank Filter: Filter part #87610A Nelson
  • Hydraulic Fluid: All Production Models - AW 32 or AW 46 hydraulic oil

Service Interval:

  • Spin-On Synthetic Filter: Every 12,000 miles or yearly
  • In Tank Filter: Every 2 years or 24,000 miles

Note: If your chassis does not have the spin on filter, you must change the filter and fluid every 12,000 miles or yearly.

Legal Disclaimer & Caution: Before using any advice, and/or performing any maintenance procedures recommended on this website you should consult with your RV dealer, and/or a professional Motorhome or RV mechanic. The recommendations and advice given on this website are intended as general guidelines ONLY, and may not pertain to your particular make and/or model of RV or Motorhome. Use these suggestions, repair tips, and/or maintenance advice AT YOUR OWN RISK. Under no circumstances will this website, or any of its officers or employees be liable for any consequential, incidental, special or exemplary damages even if appraised of the likelihood of such damages occurring. The owners of this website do not warrant the information against errors, omissions or deficiencies of any kind.

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