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Assembly / Disassembly Instructions
HDL Series Actuator
Spring Return Extend (SRE) Application
(ATI Drawing No. 6042)
Assembly
1.
Place spring cartridge assembly (Item 13) on a flat surface with the O- ring groove facing
up.
2.
Install O-ring (Item 12) in head groove with a light coat of grease.
3.
Install the tie rods (Item 5) into upper head. Be sure that threads do not extend above
upper head (Item 13) top surface.
4.
Install cylinder tube (Item 6) on upper head. Apply a thin layer of grease to inside surface
of cylinder.
5.
Install wear ring (Item 8) and quad seal (Item 9) on the piston (Item 7).
6.
Install O- ring (Item 10) on piston rod (Item 11).
7.
Thread the piston rod (Item 11) into the piston (Item 7).
8.
Apply a thin layer of grease to the piston rod (Item 11), to the entire piston (Item 7), and
install piston and piston rod assembly into cylinder (Caution: care must be taken as not to
cut the piston wear ring and quad seal).
9.
Install O-ring (Item 4) on lower head (Item 3) with a light coat of grease.
10.
Apply a thin layer of grease to the inside surface of the lower head (Item 3) including the
inside of the bearing tube, and install the lower head (Item 3) on the cylinder tube (Item 6).
11.
Adjust the tie rods (Item 5), if necessary, so that at least one (1) full thread of each tie rod
extends past the nut (Item 2) after installing the lock washer (Item 1) and the nut (Item 2).
Check that the tie rod threads are flush with upper head from Step 3. Tighten securely,
then torque to recommended specs using a crisscross pattern. See Fig. 1 on the following
page for Torque specs.
12.
Install bearing seals (Items 14, 16 & 17) on rod bearing (Item 15).
13.
Install rod bearing over piston rod (Item 11) and into lower head (Item 3).
14.
Install bearing retaining ring (Item 18) into groove on lower head (Item 3).
15.
Cycle actuator and check for smooth operation and leaks.
