31
Drive Cylinder Seal
Replacement
NOTE: Follow the disassembly instructions
for the Post Driver until the Cylinder is out
of Driving Ram.
1.
Unscrew the Cylinder Cap and remove the
Cap and Piston Rod.
IMPORTANT: PLEASE TAKE CARE
DURING REMOVAL OF PISTON ROD TO
PREVENT SCORING IT, TO AVOID OIL
LEAKAGE.
Driver Cylinder disassembly.
2.
Remove the Piston Guide Nut and Piston
Guide (SM-02610) from the lower end of
Piston Rod. Slide the Cylinder Cap down
and off the Piston Rod.
DO NOT
slide the
Cylinder Cap up and off the Piston Rod as
the upper threads will score the inside of
the Cylinder Cap.
3.
Use a screwdriver or pick to remove the old
Seal (see below).
Cylinder Cap Seal removal.
4.
Clean the seal grove in Cylinder Cap.
5.
Squeeze the new Seal together and place
one end of it into the cavity of the Cap.
Force the Seal down and it will snap into
place. This is easier to do if the Seal has
been softened by placing it in hot (120
°
F)
water.
6.
Oil the new Seal and slide the cylinder Cap
onto the Piston Rod starting at the bottom.
DO NOT
slide the Cylinder Cap onto the
Piston Rod from the top as the upper
threads will score the inside of the Cylinder
Cap and damage the new Seal.
7.
Replace the Piston Guide and Piston Guide
Nut.
8.
Replace the Cylinder Cap & Piston Rod into
the Cylinder Tube. Use a paste type thread
sealer,
DO NOTE USE A TAPE SEALER
as
this will void the Cylinders warranty.
9.
Replace the Cylinder into the Driving Ram
and reassemble reversing the disassembly
steps.
10.
Adjust the locknuts to re-center the Cylinder.
Post Driver Reassembly
Reverse the Post Driver Disassembly
instruction.
1.
Lubricate the Guide Bars with clean oil to
reduce friction. Use an overhead lifting
device as shown below or get assistance
to slide Main Carriage Channel over Guide
Bars from the top of the Drive Ram.
Main Carriage Channel reassembly.
2.
The Main Carriage Channel should slide
back and forth freely.
3.
With the Drive Ram Assembly in the horizontal
position, check the up and down movement of
the Main Carriage Channel in the Drive Ram I-
Beam. Up and down movement should not be
less than 1/4
”
or more than 1/2".
4.
Install the Road Lock Pin and retainer pin
(arrow) as shown below.
