(rhythmic rock music)
- [Narrator] Today we're going to show you
the step-by-step process of disassembling
and reassembling the Vermeer
RH15 dual rod drill head.
You or a trusted service technician
should rebuild the drill
head every 50 inner rod hours
for optimal performance.
Our rebuild tool kit is available
through your local Vermeer dealer.
Prior to performing service
on Vermeer equipment
always refer to the operator's
and maintenance manual
for safety messages and
further instructions.
Tool disassembly.
It is important to note,
that the rod head weighs
approximately 250 pounds,
so you'll need to have a
suitable lifting device.
After securing the
drill head on your bench
or workstation, place the
necessary tools nearby
for an optimal disassembly
and reassembly experience.
First, remove the drill head drill string.
Refer to the machine's operator's manual.
Removing the bit may help
maneuver the bearing shaft
during the rebuild but is optional.
Tools required are a small punch,
punch holder, non-marring hammer, pliers,
heat source, like a torch,
and disposal bin ready.
Make sure you wear the
appropriate PPE including
safety glasses, gloves, safety shoes,
and hearing protection
for the rebuild process.
When your preparation is complete,
you are ready to start the
tool disassembly process.
Step one, remove the
grease cap and zerk fitting
from the bearing housing.
Step two, using the wrench
provided in the rebuild kit,
apply the wrench to the
flats of the bearing shaft
and align those flats
with the flats on the front collar.
It is important to know
the bearing shaft can spin
in either direction to align.
Step three, using the wrench,
slowly spin the bearing shaft
and the front collar
counter clockwise together
until the tail end of the
lock ring is visible in
the slot of the bearing housing.
Step four, next,
use the small punch to tap
under the tail of the lock ring,
until the tail slightly
lifts from the head.
Step five, remove the lock ring
from the previous step
by applying the wrench to the flats of the
front collar and bearing shaft.
While facing the bit end
of the bearing shaft,
turn the wrench clockwise
until the lock ring is
completely dis launched
from the tool.
A-pliers may be used to
bend up the end of the
lock ring as it comes out.
Step six, use the wrench again
to remove the bearing shaft assembly
from the bearing housing.
Now, with controlled swings,
strike the wrench with
a non-marring hammer.
Step seven, there are two O-rings
located on the front collar.
When the first O-ring becomes visible
through the lock ring slot
in the bearing housing,
cut it and pull it out through the slot.
When the second O-ring is visible,
remove it in the same manner.
Removing the O-rings will
allow the front collar
and bearing shaft assembly
to slide out of the
bearing housing more easily.
Step eight, remove O-ring,
C-clips,
six ball bearings,
and front collar from the bearing shaft.
Remove seals from the front collar.
Step nine, for this next step,
prepare your torch for use.
Carefully, heat the front
bushing and rear bushing
within 300-500 degrees Fahrenheit,
149-260 degrees Celsius,
individually using a torch.
An important note about heating is that
the front bushings, the rear bushings,
or the bearing shaft
should not change color during heating.
Orienting the bearing shaft
with the threaded portion up
will allow gravity to
let the rings fall off.
Step 10, use the seal removal hook
included in the rebuild tool kit
to remove seals from the bearing housing.
Step 11, it is important
to thoroughly clean
the inside of the bearing
housing, front collar,
and bearing shaft.
Tool assembly.
The next part of this video
is going to show you the
reassembling process.
You will continue to use
tools from the disassembly,
so continue to keep those nearby.
Verify that the inside
of the bearing housing
and seals are clean.
Step one, using the torch,
heat the front bushing within
300-500 degrees Fahrenheit,
149-260 degrees Celsius,
and install onto the bearing shaft.
Tap the front bushing into place.
Step two, next, heat
the rear bushing within
300-500 degrees Fahrenheit,
149-260 degrees Celsius.
Using the torch
and install onto the bearing shaft.
Tap the rear bushing into place.
Again, the front bushings, rear bushings,
or the bearing shaft should not
change color during heating.
Allow the bearing shaft
and bushings to cool
before installing the
rest of the components.
Step three, use the seal
driver included in the
rebuild tool kit to
install three front seals
one at a time into the front collar.
Be sure to install the front seals
with the lips facing down, as shown.
Step four, then install two
O-rings onto the front collar.
Step five, lightly grease the
inside surface of the seals.
Step six, push the front
collar onto the bearing shaft.
It should fit snugly.
Step seven, the next step is
to slide six ball bearings
onto the bearing shaft
and if needed,
lightly tap with a non-marring hammer
to get them started.
Step eight, install the split C-ring.
Step nine, then install
the provided O-ring
around the split C-ring.
Step 10, after checking the condition
of the housing and seals,
insert three rear seals one at a time
into the bearing housing,
using the seal driver.
Step 11, install the seals
with lips facing the
bearing housing, as shown.
Springs are toward the rear
of the bearing housing.
Step 12, apply a light coating of grease
to all O-rings, bearings,
and exposed seal surfaces.
Refer to the maintenance
manual for more information.
Step 13, next, you will
need to apply grease
to the hex end of the bearing shaft
to aid in assembly.
Verify that the grease zerk fitting
and cap are removed from
the bearing housing
to allow air to escape
when the bearing shaft is installed.
Step 14, with the zerk
fitting and cap removed,
install the bearing shaft
into the bearing housing.
You may need to tap the bearing shaft
with a non-marring mallet,
to assist in installation.
Step 15, install the
bent end of the lock ring
into the hole in the slot
of the bearing housing
and front collar. If necessary,
you may rotate the front collar
and bearing shaft until the hole
in the groove of the
front collar is visible
in the slot of the bearing housing.
Step 16, while applying the wrench to the
flats of the bearing
shaft and front collar,
turn the wrench,
and continue to rotate the bearing shaft
and front collar counter clockwise.
Continue to rotate the
bearing shaft and front collar
until the tail end of the lock ring
is no longer visible,
and only the flat backbone
of the lock ring is showing
A punch may be required
to push the bent end
of the lock ring snugly
into the hole in the
groove of the front collar
so that it can be
rotated past the opening.
Step 17, install the grease zerk fitting
into the bearing housing.
Step 18, apply grease to the zerk fitting
until a 14-ounce tube has been emptied.
Refer to the manual for more information.
Step 19, we will install
the grease zerk fitting cap
into the bearing housing.
Confirm that the drive shaft is engaged
and rotates with the bearing shaft.
Thank you for watching the disassembly
and reassembly process of the inner rod
for the RH15 dual rod drill head.
Remember perform this process every
50 inner rod hours.
To order a rebuild kit,
contact your Vermeer dealer.
