13
socket. The crank pin has
LEFT-HAND
THREADS
. Use caution holding the con-
necting rod and crankshaft (p/n 300040).
The connecting rod and crankshaft can
be damaged. Use a small wood or plastic
block to keep the crankshaft from rotating.
When the crank pin is removed, the piston,
connecting rod, hammer can be removed
by pushing the connecting rod down into
the cylinder until it can be removed from
the bottom of the post driver body. Note
position of the hammer. The small end of
the hammer is toward the anvil as shown
in
Fig. 14
. Clean and inspect the hammer
for damage or excessive wear. The ham-
mer o-ring seal should be replaced at this
time.
Clean and inspect the piston and con-
necting rod. Insert the crank pin into the
bearing on the connecting rod. If there is
excessive play or side movement between
the two, the connecting rod and possibly
the crank pin should be replaced. Check
the movement in the bearing in the piston
side. If there is excessive play the connect-
ing rod should be replaced. The piston o-
ring seal (p/n 301610) should be replaced
at this time. See
Fig. 15
.
Clean and inspect the cylinder and crank-
case for any damage or wear. Replace any
damaged parts. Lubricate the cylinder,
piston, and connecting rod with Rhino ap-
proved grease. Insert the connecting rod,
with the piston attached, into the cylinder.
Push the piston up the cylinder until the
bearing in the connection rod aligns with
the threaded hole for the crank pin. Insert
the crank pin through the bearing and start
the threads into the crankshaft by hand.
These are
LEFT-HAND THREADS
.
Tighten the crank pin using the 7/8
″
deep
well socket. Torque to 228 inch/pounds.
Add Rhino approved grease (p/n 300500)
to the crankcase to the level shown in
Fig.
11
.
(See Caution: Do not overfill grease
on page 11)
If grease has been completely
removed add approximately 4 teaspoons
of grease or until level with the bottom of
the crankpin head. Close the crankcase by
placing the crankcase cover o-ring seal
onto the crankcase cover. Place the crank-
case cover onto the post driver body, start
the thread, and twist to the right (clock-
wise) with your hand until it is secure
against the post driver body.
(See Cau-
tion: Hand Tighten Only on page 11)
Lubricate the cylinder and hammer with
Rhino approved grease. Insert the hammer
GPD-40 Fence Pro™ Service Instructions... continued
Fig. 14
-
Small end of Hammer is toward
the anvil .
Fig. 15
-
Piston with Connecting Rod and
O-ring Seal in place .
