Anchor/Darling developed a Replacement Parts Book to aid its customers in determining the proper replacement parts for the several configurations of Hydraulic Shock and Sway Arrestors (HSSA’s) that were previously supplied by Bergen-Paterson Pipesupport Corporation and are now manufactured by Anchor/Darling. This manual encompasses only those replacement parts for the Hydraulic Cylinder Assemblies and not for any paddle ends, attachment bolting, extension struts, structural attachments, etc. Customers requiring replacement parts information on those items are directed to contact the nearest Anchor/Darling sales representative.
In order to determine the proper selection for replacement parts, the user of this manual must first determine the cylinder configuration type. Four different design configuration types as follows were supplied by Bergen-Paterson.
TYPE M: The Manifold Configuration Cylinder
Identifiable as sandwiching the flow control body be tween the main cylinder and top mounted reservoir. The piston rod gland was held in place utilizing the main cylinder tie rods and tie rod thread pitch was fine.
TYPE M77: The Flange Configuration Cylinder
Similar to the Type M, this configuration uses socket head cap screws to hold the piston rod gland in place and the main cylinder tie rods uses coarse pitch threads.
TYPE NF: The Extended Tie Rod Configuration Cylinder
Nearly identical to the Type M77, except that the base end mounting arrangement consisted of extended main cylinder tie rods and not a separate flange.
This revision of the Parts Replacement Book discontinues most references to the Type E Cylinders. These units were supplied by Bergen-Paterson starting in mid 1969 and continuing until late 1972. Given the vintage of these units, Anchor/Darling has discontinued stocking these parts. Anchor/Darling recommends against rebuilding these cylinder types and replacing them with units manufactured to the current design. If further information regarding the Type E Is required, contact your nearest Anchor/Darling sales representative.
Manifold Configuration Cylinders were supplied by Bergen-Paterson from late 1972 until early 1977. Anchor/Darling continues to offer the full line of replacement parts for the Type M units. Be aware that some of the Type M cylinders used stroke parts 0.06 inches less length than the stated value for the part. If questions arise as to which replacement part should be used, contact Anchor/Darling Engineering.
Regarding M77 and NF configuration cylinders, Anchor/Darling presently manufactures these two configurations and they remain 100% interchangeable with cylinders previously supplied by Bergen-Paterson. However, Anchor/Darling has discontinued the usage of the terms “M77” and “NF” and now simply refers to those designations as either flanged or extended tie rod mount cylinders. Anchor/Darling has also replaced the Model No. 2500 designation used by Bergen-Paterson. Following Is a comparison between the previous system used by Bergen-Paterson and the one currently used by Anchor/Darling.