5 Ton Ram Internal Expansion Instructions for Holedall Petroleum H520 Series Couplings Dixon Valve & Coupling Company 800 High Street • Chestertown, MD 21620 Phone: 800-355-1991 • Fax: 800-283-4966
1a Ensuring that the ram is fully retracted, remove the standard base plate. 1b Replace the standard base plate with the Holedall Petroleum thrust plate holder (15ROSTPA). 2 Select the proper pull rod. For 5/8” and 3/4” couplings use 15ROSTROD. For 1” through 1 1/2” couplings use 15RODSMALL. Note: 15RODSMALL is shown. For 2” through 4” couplings use 15RODLARGE. Note: To use 1 1/4” through 4” keyed plugs (from HMA machine) use 15ROSTROD with keyed shaft part number 25000HSP10.
4a Slide the stem over the pull rod and into the recess of the adapter plate with the connection side of the stem facing the Ram. For male stems, insert the hex into the recess of the thrust plate. For female stems, insert the first hex into the thrust plate so that it goes all the way through then insert the second hex into the recess of the thrust plate. Note: Do not lubricate! No additional lubricant is needed. Stems are pre-lubricated from the factory.
7 Ensuring that the end of the ferrule is aligned with the mark from Step 6, slide the hose with ferrule over the shank until the ferrule contacts the shoulder of the stem. Check to see if the proper pocket is maintained. IMPORTANT! If there is incorrect “pocket” for the rubber to displace into, damage may occur to the stem, ferrule or both, which could result in coupling failure.
Insertion Dimensions for Rostra Fittings Ferrule Sizes Insertion Length 1" ........................................................... 25/32" 1¼" ........................................................ 25/32" 1-3/8" .................................................... 25/32" 1½" ...................................................... 1-1/32" 2" ....................................................... 1-19/32" 2½" ........................................................ 2-1/4" 3" ..........................
