MUELLER
®
B-101
TM
and B-100
TM
Drilling and Tapping Machines
Operating Instructions
11
properly engage. It is very likely it
will be necessary to slightly shift the
machine during this operation to get
proper alignment.
17. As soon as boring bar is
permanently attached to extracting
tool, chain hook nuts can be
tightened. Considerable caution is
required to bring the machine down
evenly on the pipe. If machine is
tightened down unevenly a strain will
be placed on boring bar and if old
corporation stop or plug is removed
under these conditions, the new one
will not start in the old hole.
15. Slowly move boring bar
downward to engage left hand
thread of extracting tool shank with
mating thread in nut part attached
to corporation stop or plug. Attach
ratchet handle to boring bar and
adjust ratchet for counter-clockwise
rotation.
16. As soon as the extracting tool
shank contacts the nut part on
corporation stop or plug, slowly
rotate the ratchet handle counter-
clockwise to engage the left hand
threads. This is a very sensitive
operation and extreme caution
must be taken to be sure threads
18. Push bypass valve to “bypass”
position and rotate ratchet handle
counter-clockwise to extract the
stop or plug. Raise boring bar to
upper position as soon as old stop or
plug becomes disengaged from main.
19. Close flop valve and pull bypass
valve to “relieve” position.
20. Proceed with the use of
the machine following previous
instructions.
3. Attach a length of hose to the
blow-off valve outlet. Valve outlet is
3
/4” National Hose Thread (regular
garden hose coupling size). (S.)
4. When starting to drill and tap the
main, open the valve. Main pressure
will flush the chips out through the
hose outlet.
5. Close the valve after the tapping
operation has been completed.
NOTE: The tapping machine body
has a boss with
1
/2” I.P. tapping
and is shipped with a brass plug
installed. A blow-off valve is also
shipped with each machine. The
blow-off valve provides a means
to prevent pipe chips and other
drilling and tapping residue from
entering the main during pressure
taps.
To properly use the blow-off valve,
follow these instructions:
1. Remove the brass plug from the
boss of machine body.
2. Apply non-hardening dope to the
inlet threads of the blow-off valve
and install the valve in the tapped
boss of machine body. The valve
should be tightened sufficiently to
provide a pressure tight joint and
then positioned so that the valve
key does not interfere with the pipe
saddle.
Blow-o Valve Operating Instructions
S.
1 502025 Pivot Arm
2 502026 Pivot Arm Spring
3 502027 Roll Pin
4 580611 Feed Nut & Yoke
Complete
5 502029 Lock Nut
6 502028
Operating Screw
7 580610 Friction Collar
8 502022 Boring Bar
9 502046 Valve Body
10 581286 Boring Bar Complete
4
7
5 6
8
9
10
2
1
3
NOTE: Parts for the B-101
machine are the same as the
B-100 machine except for the
parts shown here.
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