Reassembly of ERT1D and ERT2D
1. When replacing seals, make sure they are correctly
positioned as shown on the tool assembly drawings in
this manual. Wipe all seals with a thin film of seal lubri-
cant before reassembly.
2. It is important to inspect the cylinder wall to insure the
surface is free of any gouges or nicks that will damage
a new seal. Small nicks or gouges can normally be
removed using a fine crocus cloth.
3. After all seals, o-rings and back-up rings are replaced,
ERT1D
With the Piston Forward Stop placed on the Piston
shaft, insert the End CapAssembly into the Piston, then
slide the complete assembly into the tool Cylinder.
ERT2D
Insert the End Cap Assembly into the Piston, then slide
the complete assembly into the tool Cylinder.
NOTE: Use caution when inserting this assembly
into the cylinder to keep the piston from "cocking"
in the cylinder and "nicking" the cylinder wall. This
could ultimately cause a seal edge to be cut.
Secure the End Cap and Support Loop Assembly with
two screws (ERT1D) or four screws (ERT2D).
4. At this point, reposition the tool in the vice with the open
front of the cylinder pointing straight up. You can choose
from two options for filling the tool with hydraulic fluid:
a) Gravity fill: Connect the hydraulic line to the power
unit and allow hydraulic fluid to flow from the higher
positioned reservoir into the tool cylinder until it is
level with the front Retaining Ring, then disconnect
the hydraulic line for installation of remaining com-
ponents.
b) Optional fill: Using the Model 300509 Bleed Pump
Assembly, you can save time by pumping from the
hydraulic connector thru the line, filling the tool in
the same manner and to the same level as above.
5. ERT2D
Replace the Front Seal Retainer by positioning the
cutout section so it will clear the two ears of the
Retaining Ring when it is dropped into place. If the
retainer does not lay flat, tap it gently with a screwdriv-
er until it assumes a flat position.
6. Slide the hydraulic seal down over the piston threads
and wrench flats carefully to prevent "nicking" the seal
edges.
ERT1D
Insert the Piston Rod Guide and Wiper assembly, push-
ing the Hydraulic Seal down into the Cylinder. Secure
the Piston Rod Guide with two screws. Torque the
screws at both ends of the tool to 12-15 ft/lbs.
ERT2D
It is not necessary to push the seal all of the way into
the Cylinder. It will assume its position in the Piston Rod
Guide when the guide is next installed and secured with
the two Bearing Plates and four Screws. Torque the
screws at both ends of the tool to 60-80 in./lbs.
8. This method of refilling the tool with hydraulic fluid
relieves any further requirement for bleeding air. The
tool can now be connected to the power unit and be test
cycled. The pulling head assembly can now be
installed.
9
ERT D Series Tooling Alcoa Fastening Systems
SERVICE PROCEDURES (CONT.)