Copyright 2019 Discovery Owner's Association, Inc.

Fluids and Filters

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:

  • Cummins ISC (rear and side radiator): 10.5 Gallons
  • Cummins ISL Side Radiator: 10.5 Gallons
  • Cummins ISM Side Radiator: 12.5 Gallons

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.


WHO WE ARE

The DISCOVERY OWNERS ASSOCIATION, INC, was formed to promote the sharing of information and the camraderie of fellow Discovery motorhome owners. Membership in the club is limited to owners of Fleetwood Discovery motorhomes.

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