MUELLER
®
D-5
TM
and E-5
TM
Drilling Machines
Operating Instructions
5
The pressure inside of the drilling
machine will tend to raise the boring
bar. Hold down on the boring bar
or use the feed yoke to control the
upward motion of the boring bar
thereby preventing shock or damage
to the drilling machine.
16. Close valve, stop or tting being
used.
17. Remove drilling machine and
machine adapter nipple as a unit.
18. Advance boring bar and remove
machine adapter nipple and drilling
tools from machine.
19. After being used, clean dirt and
foreign material from machine and
equipment. Lubricate machine and
give drilling tools a light coat of oil
to protect them from rust. When not
in use, the machine and equipment
furnished with each machine should
be stored in the box furnished with
the machine. The machines should
be dis-assembled periodically, and
the boring bar and the machine
body thoroughly cleaned both inside
and out. By doing this, any dirt, grit,
chips, or other foreign material that
might have possibly accumulated
on the boring bar or in the body of
the machine may be detected and
removed before any damage is
done. An accumulation of foreign
material on either the boring bar or
inside of the body will restrict the
reverse travel of the boring bar.
This will apply a light, even feed.
Feed handles should be used to
apply a heavier feed.
NOTE: When nearing the
completion of the cut DO NOT
over-feed or the cutting tools may
be forced through before all the
material is drilled or cut out.
The E-5 Machine is now furnished
with a combination ratchet and crank
handle. When drilling small holes
the crank handle should be turned
upward and rotated in continuous
circles instead of ratcheting.
14. Continue drilling operation until
pipe is drilled through completely.
This can be determined by the
feel of the feeding mechanism, the
pull on the ratchet handle or by
measuring the advance of the boring
bar. If drilling is not completed,
retract boring bar slightly and ratchet
and feed slowly to remove the
remaining metal a little at a time.
15. When drilling operation is
completed turn operating screw
on locking mechanism counter-
clockwise to unlock pivot arm.
Remove feed-yoke from friction
collar and retract boring bar to its
rearmost position. Be sure that the
drill or pilot drill clears the valve gate
or key of stop if a stop is being used.
NOTE: If the pressure in the
main is 90psi or over, the locking
mechanism on the feed yoke
may be used to control the
upward movement of the boring
bar by leaving it attached until
uppermost position is reached,
then disconnect as described
above.
CAUTION: DO NOT reverse
rotation of ratchet handle when
retracting the boring bar.
SPECIAL NOTE: In general, the
machines should be lubricated
as described in instruction
No.1. However, due to extreme
conditions in some areas (dust,
sand, etc.) it may be advisable
not to lubricate the feed sleeve or
threaded parts of these machines
since it would tend to increase the
abrasive or wearing action. This
procedure, of course, must be at
the discretion of the operator.
!
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