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Ford Model 77 Operating Instructions
CAuTIOn: Always follow pipe manufacturer's recommendations to protect from injury.
1.
Remove the Drilling Machine
from the Tool Box (DMTB) and
lay it on a flat surface . Back the
Feedscrew (DMHF) out until
the end is flush with the Yoke
Assembly (DMY) .
2.
Select the diameter of Boring
Bar (DMBB) which will pass
through the Corporation Stop
when it is open . Attach the
Drill (DMD) to the Boring Bar
(DMBB) and lightly tighten with
the adjustable wrenches .
3.
Insert the Boring Bar (DMBB)
into the body of the machine
until the shoulder hits the stop .
Gently tighten the Packing
Bushing (DMPB) .
4.
Select the Adapter (DMA) that
matches the outlet threads on
the Corporation Stop . Attach
the Adapter (DMA) to the
bottom of the Drilling Machine .
5.
Mount the pipe saddle and
Corporation Stop on the water
main and tighten the saddle
straps . Mount the Drilling
Machine onto the Corporation
Stop . Check to be sure the
Corporation Stop is fully
open.
IMPORTAnT – geneRAl MAInTenAnCe
1 . Clean the tools and lightly oil the boring bar (DMBB) and cutters before returning them to the tool box (DMTB) .
2 . When using the PVC shell cutter (DMSC), the assembly and operation is the same as using a drill (DMD) . For 3/4" PVC
taps, use the 11/16" shell cutter (DMSC-3) . For 1" PVC taps, use the 7/8" shell cutter (DMSC-4A) .
3 . Check the cutters regularly for sharpness . Sharp cutters will assure an easy tap . Professional sharpening is a good
investment because the cutting edge will have the proper angle, lip clearance, and chisel point to match the hardness of the pipe .
4 . When the day's work is completed, always dismantle and replace the drilling machine in the tool box so nothing will be lost or
damaged . Cutters will break easily if the machine assembly is dropped or mishandled . Simple preventative maintenance
will make this device last for many years at a minimal cost per tap .
AB-8
6.
Carefully lower the Drill (DMD)
until it touches the water main .
Attach the Ratchet (DMRW) to
the top of the Boring Bar (DMBB) .
Raise the Yoke (DMY) until the
Feedscrew (DMHF) is centered over
the Boring Bar (DMBB) . Place a
few drops of oil on the point of the
Feedscrew (DMHF) and mate the
point with the center of the Boring
Bar (DMBB) . Open Chip Flushing
Port (if equipped) .
7.
Rotate the Ratchet (DMRW)
clockwise only while applying a
light turn of the Feedscrew (DMHF) .
Make at least two (2) quarter
turns of the Ratchet (DMRW)
before applying more pressure
on the Feedscrew (DMHF) . Use
Feedscrew (DMHF) as follower
only and exert light pressure on the
Boring Bar (DMBB) . When drilling
PVC pipe use a steady continuous
cutting action and do not stop until
the cutter is completely through
the pipe . With PVC it is important
to continue cutting until the Shell
Cutter has penetrated the wall of
the water main and the Boring
Bar (DMBB) shoulder contacts the
bottom stop in the Adapter (DMA) .
8.
Slowly reverse the Feedscrew
(DMHF) and allow the Boring
Bar (DMBB) to slowly back out
until it hits the top stop in the
machine . If you are drilling into a
live/pressurized line, the Drilling
Machine will be under pressure . As
you back out the Boring Bar, place
the palm of you hand on the Ratchet
to prevent the Boring Bar from
snapping out of the main . Close
the Corporation Stop and release
the entrapped pressure before
removing the Drilling Machine from
the Corporation Stop .
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