Information on this page is taken from the August, 2001 edition of Freightliner's "KNOWING YOUR CHASSIS". Note that not all the information here pertains to the Freightliner XC chassis that the D is built on.
| OIL AND FILTER CHANGE | ENGINE FUEL FILTER CHANGE |
| Caterpillar 3126 & 3126B 19 Qt Pan Serial # Prefix 1WM & 7AS | 9000 Miles or 1 year, whichever occurs first |
| Caterpillar 3126B & 3126E 22 Qt Pan Serial # Prefix 7AS, 8YL, 9SZ & CKM | 11,000 Miles or 1 year, whichever occurs first |
| Cummins B5.9L & C8.3L | 12,000 Miles or 6 months, whichever occurs first |
| Cummins ISB and ISC | 15,000 Miles or 1 year, whichever occurs first |
| RECOMMENDED FLUID TYPES | |
| Engine Oil | Transmission Fluid |
| Caterpillar and Cummins Engines outside air temperature between +5F and +122F SAE 15W-40 CH-4, CG-4 or CF-4 | MD3060, 1000/2000 Series, 3000/4000MH Dextron III 2000MH Transynd |
| Rear Axle Differential & Front Wheel, Oil Lubricated Wheel Bearings | Hydraulic System Reservoir |
| Cummins ISB and ISC | 15,000 Miles or 1 year, whichever occurs first |
| SAE 80-90W Gear Lubricant | Dextron III |
| Front Axle Spindle Pins, Tie Rods, Drag Link, Intermediate Shaft & Gear | Front & Rear Wheel bearings, Brake Camshafts, Auto Slack Adjusters & U Joints |
| Multi-Purpose Grease NLGI Grade 1 or 2 | Multi-Purpose Grease NLGI Grade 1 or 2 |
| Brake Caliper Slides | |
| Aeroshell Grade 5 (ES-1246) Grease | |
COOLANT SYSTEM CAPACITIES
NOTE: The following capacities do NOT include heater core supplied by the coach builder, which will usually add approx 2 gallons to the capacities listed below.
Caterpillar 2126, 3126B, 3126E (Side or Rear Radiator): 9.5 Gallons
Cummis ISB (rear radiator): 9 Gallons
The following engines are not used in the Discovery and are listed here for general information:
HYDRAULIC FILTER
Some confusion has arisen as to whether or not your hydraulic system has a filter in it. All Freightliner chassis with rear radiators DO NOT have a hydraulic filter. All Freightliner chassis with a side radiator HAVE a hydraulic filter.
The DISCOVERY OWNERS ASSOCIATION, INC, was formed to promote the sharing of information and the camaraderie of fellow Discovery motorhome owners. Membership in the club is limited to owners of Fleetwood Discovery motorhomes.