Mill Supply Logo

New Master Cylinder with 4-3/4" High Reservoir - Replaces 4934

Part Number: 10-487

Price: $316.41

In Stock, Ready to Ship!

New Master Cylinder with 4-3/4" High Reservoir - Replaces 4933 or 4934. This reservoir is a universal unit that replaces Ford, IHC, Workhorse, Freightliner with 50.80 or 2" bore. Switches are included for both the casting and the reservoir. Either switch can be removed if not needed.

Measure reservoir height before ordering, this reservoir is 4-3/4" tall. Freightliner uses 2 different reservoir sizes.


  • ID#: 4933 or 4934 (not stamped on unit)
  • Bore Diameter: 50.80mm or 2" (Bosch)
  • Reservoir Capacity: 84 Cubic Inches
  • Overall Reservoir Size: 4-3/4"H x 6-1/2"L x 5-1/4"W
  • Split: 50/50
  • Primary Outlet: 9/16-18
  • Secondary Outlet: 1/2-20

Return core for $40.00. 1 year warranty.

For a replacement warning switch that mounts on the casting order 36984.

For a replacement fluid sensor switch on the reservoir order 36-987



Mill Supply has been the #1 supplier of step van parts for over 30 years. If you have a Workhorse, Utilimaster, Morgan Olson or other type of walk-in van you have landed on the right page. You will not find a more complete listing of parts for stepvans anywhere! With research and development on-the-go, new products are constantly being added to keep up with the growing industry. You can count on great customer service, fast shipping, and discount prices when you shop with us. It doesn't matter if you use your truck on-the-job, for deliveries, or run a food truck, you can count on Mill Supply to keep your vehicle in top shape. If you have any questions don't hesitate to either contact us via email or give us a call at 800-888-5072 between 8:00 a.m. - 5:00 p.m. E.S.T. and one of our experienced representatives will be happy to help you.

OEM Number: 4934

Estimated Shipping Dimensions: 9" x 9" x 5"

Weight: 12.56 lbs

Mon-Fri 8AM - 5PM EST
Copyright ©2019 Mill Supply, Inc.
Mill Supply, Inc. 19801 Miles Rd. Cleveland, OH 44128