Mueller A-3 Instruction Manual

MUELLER®
opERating instRUctions ManUaL
Customer Service Center
Decatur, Illinois
800.798.3131
www.muellercompany.com
[e-mail]
All warranties, expressed or implied, for Mueller Drilling Machines are
rendered null and void if the machines are used with shell cutters or
equipment manufactured by someone other than Mueller Co.
WARNING:
1. Read and follow instructions carefully. Proper training and periodic review
regarding the use of this equipment is essential to prevent possible serious
injury and/or property damage. The instructions contained herein were
developed for using this equipment on ttings manufactured by Mueller Co.,
and may not be applicable for any other use.
2. Do not exceed the pressure ratings of any components or equipment.
Exceeding the rated pressure may result in serious injury and/or property
damage.
3. Safety goggles and other appropriate protective gear should be used.
Failure to do so could result in serious injury.
4. Pressure test, check for and repair leaks in all ttings and components
each time one is installed or any joint or connection is broken. Failure
to nd and repair a leak from any source in the ttings, by-pass lines or
equipment could result in an explosion and subsequent serious injury and/
or property damage.
5. Mueller Drilling Machines and Equipment have been carefully designed
and engineered to work together as a unit. The use of equipment
manufactured by someone other than Mueller Co. may cause excessive
wear or a malfunction of the Mueller machines.
!
Reliable Connections
TM
A-3TM Drilling
and Tapping
Machine
TABLE OF CONTENTS PAGE
General Information 2
Maintenance Instructions 3
Installation & Operating Instructions 4-9
Parts Information 10
Notes 11

1” .46 .44 .40 .39 .38 .37 .36 .36 .36 .35 .35 .35 .34 .34 .34
11/4” .57 .52 .47 .44 .42 .41 .49 .39 .39 .39 .38 .37 .37 .37 .37
11/2” .64 .58 .51 .47 .45 .43 .42 .41 .40 .40 .39 .38 .38 .37 .37
2” .86 .75 .61 .55 .51 .48 .46 .45 .44 .43 .42 .40 .40 .39 .38
1” .459 .438 .411 .396 .387 .381 .376 .373 .370 .368 .365 .361 .359 .358 .356
11/4” .528 .493 .449 .425 .410 .400 .393 .388 .383 .380 .375 .370 .366 .363 .361
11/2” .588 .540 .481 .449 .430 .417 .407 .400 .394 .390 .383 .376 .372 .368 .366
2” .740 .657 .558 .508 .477 .456 .441 .430 .421 .414 .403 .392 .385 .380 .376
21/2” — .968 .812 .736 .689 .658 .636 .620 .607 .596 .580 .565 .554 .546 .541
3” — — .975 .855 .784 .737 .704 .679 .659 .644 .620 .596 .580 .569 .560
     
                 
AWWA
Taper
Thread
AWWA
I.P.
Thread
A-3TM Drilling and Tapping Machine
General Information
3
Equipment Furnished With
Each Machine
• Wooden storage chest
• Ratchet handle
• Ratchet handle extension
• Small saddle gasket
• Large saddle gasket
• Flat link chain with eyebolt and nut
for 6” – 16” pipe
• Chain hook, nut and washer
• Box end wrench for chain hook nut
• Allen wrench
• Open end corporation stop wrench
• Body cleaning chisel
• Cutting grease
Capacity and Use
The A-3 Machine is designed for
hand or power operation and tools
are fed automatically during the
power drilling operation.
A special mechanism permits the
boring bar to be locked to the feed
nut and yoke to prevent the drill
from spiraling into the hole before
the hole is completely drilled.
It also prevents the drill from
dropping to the threaded section
of the combined drill and tap. This
design eliminates unnecessary tool
damage and is recommended for
low-pressure drillings.
The A-3 Drilling and Tapping
Machine drills and taps a main
and inserts a valve or plug into
the tapped hole in the main under
pressure.
Thickness of Pipe Wall
This chart (right) gives the minimum
wall thickness of pipe that will
provide the recommended four
full threads of engagement with
the corporation stop inlet thread.
For pipe with thinner walls than
specied here, use Mueller Service
Clamps and Corporation Stops.
NOTE: Mueller cutting grease is
available in pints (88366).
Shipping Specications
 
Weight 188 lbs (85 kg)
Shipping Length 36” (914mm)
Extended Length 54” (1372mm)
   
Drill and tap main Hand or power
Corp. 1” 11/4” 11/2” 2” Insert corporation stop Hand
Stops Extract corporation stop Hand
Pipe Drill and tap main Hand or power
Plugs 1” 11/4” 11/2” 2” 21/2” Insert pipe plug Hand
Extract pipe plug Hand
Items Inserted with A-3 Drilling and Tapping Machine
Tools and saddles are offered for
use with cast iron, ductile iron,
cement-lined ductile iron, ductile
iron O.D. PVC, A-C, and steel pipe
in sizes from 6” to 48”.
Maximum Working Pressure
90psi without power clevis
200psi with power clevis
2

A-3TM Drilling and Tapping Machine
Maintenance Instructions
2
Bypass Valve (A.)
Clean the bypass valve frequently.
Remove the hand knob screw, hand
knob, seat nut, eat nut washer, and
stem.
Clean out the valve ports and
passages with a piece of wire. A
Bypass Clean Out Tap is available
(part 500529) which effectively
cleans chips or foreign material from
the threaded area of the bypass
valve.
If necessary, replace the seat
washer and seat nut washer
with new Mueller®washers only.
Ordinary washers will not work
satisfactorily.
IMPORTANT: Clean the recess
below the stem threads and the
bottom inside stem thread in the
body. Chips may lodge at this
location and prevent complete
closure of the bypass valve.
Before Use
Clean and lubricate all wearing and
bearing surfaces, particularly the
boring bar, the boring bar collar, the
cap sleeve threads, and the chain
hook threads.
Inspect and clean all tools,
particularly the shank ends, and
remove any burrs or scale, which
would prevent proper alignment with
the boring bar.
Inspect and clean the socket in
the end of the boring bar and
remove any burrs or scale which
would prevent the tool from seating
properly.
After Use
Thoroughly clean the entire machine
and all tools, and lubricate all
machined surfaces.
Remove all chips from inside the
body including the flop valve recess.
A special body-cleaning chisel is
furnished for this purpose. If chips
are permitted to accumulate in
the machine they could rust and
become caked and interfere with the
operation of the flop valve.
Flat link chain must be well
lubricated and kept free from rust
and dirt. It may be advisable to store
flat link chain in a container of oil
when not in use.
The machine and all tools and
equipment should be stored in the
machine box. Carefully place tools
in their individual compartments
to prevent damage to the cutting
edges.
A.
By-Pass Valve Open
By-Pass Valve Closed

A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
4
Attach the Machine to the Pipe
1. Thoroughly clean the pipe at
the location for the tap; include an
area greater than the large saddle
gasket.
2. Place the large saddle gasket
on top of the pipe even with the
location for the tap, with the raised
projection up away from the pipe.
3. Place the saddle on the large
saddle gasket.
4. Place the small saddle gasket in
the recess in the top of the saddle.
(B.)
5. Unscrew the brass feed cap
(containing the boring bar assembly)
from the cylinder of the machine.
6. Place the body and cylinder of the
machine on top of the small saddle
gasket. Position the machine so the
word “TOP” cast on the body is up if
the machine is to be operated in any
position other than vertical.
7. Unscrew nuts on chain hook and
eye bolt until they are flush with the
end of the threaded section.
8. Hang chain hook and washer
over one side of the chain yoke.
9. Hang eyebolt and washer (with
chain) over the other side of the
chain yoke.
Select the Equipment Required
The following equipment must be
selected from the latest Water
Distribution Products catalog.
1. Select the proper combined drill
(or shell cutter) and tap according to:
a) Size and type of inlet thread on
valve or plug to be inserted.
b) Material from which the pipe to
be tapped is made.
c) Size and class of pipe to be
tapped.
2. Select the proper saddle
according to the size and type of
pipe to be tapped.
3. Select the proper inserting tool.
a) For corporation valves
according to the size and type of
outlet.
b) For plugs according to the size.
4. Select proper extracting tool.
a) For corporation valves
according to the size and type of
outlet.
b) For plugs according to the size.
5. Select the items of special
equipment which may be required
because of special operating
conditions.
10. Bring the chain under the pipe
and connect it with the chain hook.
Be sure the chain is not twisted. The
flat link chain hook is attached to the
chain between two of the chain link
pins and always with the notch in the
hook on the outside (the side away
from the body of the machine). (C.)
11. Tighten chain hook nuts hand
tight.
12. Slide the machine around the
pipe to the desired angle.
13. Tighten the chain hook nuts
evenly. Hammer the chain around
the pipe to remove any twist in the
chain and continue tightening both
chain hook nuts until the machine is
solidly bearing against the pipe.
IMPORTANT – DO NOT tighten the
chain hook nuts after starting to
drill as it will throw the machine
out of alignment.
Use Web Belt (part no. 88693)
when tapping wrapped and coated
steel pipe. This web belt does not
damage the exterior covering of the
pipe. A-3 Machine chain is for use
on pipe up to 16” in size. Use the
proper length and type of extension
chain when tapping pipe in larger
sizes.
5
B. C.

A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
5
the collar, then lock in place with
operating screw.
5. Turn bypass valve hand knob
counter-clockwise as far as
possible. This is the bypass position
for this valve.
DRILL AND TAP – Hand
Operated Method
1. Adjust mechanism in handle so
the boring bar will rotate clockwise.
2. Drill the hole by operating the
ratchet handle clockwise and
turning the feed yoke clockwise
a little at a time. Use a light even
feed at the start. If possible, pull the
ratchet handle in an arc parallel to
the axis of the pipe thereby reducing
the tendency of the machine to slip
on the pipe. (E.)
3. Continue the drilling operation
until the boring bar feeds easily and
rotates easily, indicating the drill is
through the pipe.
Attach Tool To Boring Bar
1. Slide drift pin in boring bar socket
so that head end is exposed.
2. Insert the proper combined drill (or
shell cutter) and tap into the socket
of the boring bar. Align the keyway in
the tool shank with the key inside the
socket of the boring bar.
NOTE: The point of the tool
retaining screw purposely
contacts the upper side of the
countersunk hole in the tool to
maintain pressure on the shank
of the tool to help retain it tightly
in the socket of the boring bar.
3. Strike tool on end with a block
of hard wood to make it fit tightly in
socket.
4. Tighten tool-retaining screw in
boring bar.
5. Thoroughly coat the tool with
Mueller® Cutting Grease. (D.)
NOTE: DO NOT use cutting
grease when drilling and tapping
A-C pipe.
6. Retract boring bar to its rearmost
position.
Assemble The Machine
1. Open the flop valve as far as it
will go by turning the hand wheel
clockwise.
2. Screw feed cap and boring bar
assembly onto the cylinder of the
machine.
3. Push boring bar down by hand
until the tool contacts the main.
4. Adjust the feed nut and yoke
on cap sleeve so that the yoke
is engaged with the collar on the
boring bar. Raise the pivot arm
of locking mechanism on side of
yoke so that it is positioned under
4. Rotate the feed yoke clockwise
without rotating the boring bar until
the tap part of the tool contacts the
pipe.
5. Apply a downward pressure with
the feed yoke and at the same time
rotate the boring bar clockwise until
the tap takes hold after which the
feed yoke may be dropped off and
the tool allowed to feed itself.
NOTE: The feed yoke should
remain in contact with the boring
bar collar and should follow the
feed of the tool when tapping
under high pressure or when
tapping thin wall or asbestos-
cement pipe. DO NOT overfeed
faster than the tool is cutting as
this will strips the threads in the
pipe.
6. Continue the tapping operation
until the tapping line on the boring
bar, just under the collar, is flush
with the top thread on the feed cap
sleeve. When tapping asbestos-
cement pipe, it may be advisable to
tap 1/8” beyond the line. (F.)
D.
E.
F.
Tapping Line

A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
6
2. Set position of motor switch to
give clockwise rotation of boring
bar.
3. Start drilling operation and
continue drilling until the operation
is completed. Completion of drilling
operation can be easily detected by
torque required to resist power unit
and sound of power unit
NOTE: The tapping line is located
just below the thrust collar on
the boring bar. A distance of 11/4”
below the tapping line is limit
for use of automatic feed. Actual
drilling is always completed
before this distance is reached.
4. Loosen wing nut on feed yoke
drive socket and swing socket open.
5. Start motor and rotate feed yoke
clockwise by hand to engage tap
part of tool into main. Continue to
rotate feed yoke until tap is securely
started into the main. At this point,
turn operating screw on locking
mechanism counter-clockwise to
unlock the pivot arm and remove
the feed yoke from contact with the
thrust collar. The boring bar will
move downward allowing the tool to
feed itself.
NOTE: Feed yoke should remain
in contact with the boring bar
thrust collar and follow the thrust
collar down when machine is
being used on high pressure
mains, thin wall steel pipe or
asbestos-cement pipe. DO NOT
overfeed faster than the tap
is cutting as this will strip the
threads being tapped in the main.
DRILL AND TAP – Power
Operated Method
Using Mueller®H-603 Electric
Power Operator, H-604 Air Power
Operator or H-705 Hydrallic
Operator
The A-3 Drilling and Tapping
Machine has been designed to
permit the use of a power operator.
The power operator will drive the
combined drill (or shell cutter) and
tap and provide automatic feed
during the drilling operation.
IMPORTANT: When using H-604
air motor power operator install
an in-line lubricator as close to
the unit as practical and adjust
for slight oil mist from exhaust –
maintain pressure of 90psig. We
recommend the use of a gage
at the throttle to determine the
actual pressure of AIR AT THE
AIR MOTOR.
NOTE: Units are suitable for:
• Power drilling with automatic
feed 1” through 1” inclusive with
combined drill and tap.
• Power drilling with automatic
feed 11/4” through 21/2”inclusive
with shell cutter and tap.
• Power drilling with hand feed
11/4” through 2” inclusive with
combined drill and tap.
The gear case attaches to the
machine by the means of two
sockets. The inner or small socket
drives the boring bar. The outer
or large socket drives the feed
yoke through a gear reduction
as the boring bar is rotated. The
resulting feed on the drill is .010”
per revolution of the boring bar. The
motors are equipped with a squeeze
type trigger throttle. If for some
reason a drill should stick, the motor
can be shut of quickly.
1. Place the gear case and motor
on the drilling and tapping machine
aligning the sockets with the square
shanks on the boring bar and feed
yoke. Socket which contacts feed
yoke should be closed and wing nut
tightened securely.
6. Continue tapping operation until
tapping line on boring bar is flush
with the top of the feed sleeve part
of the cap.
IMPORTANT – WHEN TAPPING
A/C PIPE: Only hand operation of
the A-3 machine is recommended
when working on A/C pipe,
especially if it is not under
pressure. If a power operator
is used, its extra weight on the
boring bar can cause overfeeding
of the tap and result in striped
threads. When tapping A/C
pipe with one-piece CEM-RES®
Combined Drills and Taps, it is
advisable to exceed the tapping
line enough to allow corporation
valves to be inserted with only
one to three threads exposed.
The exact amount may be
determined by making a “shop
tap” ahead of time.

Attach Valve Or Plug To
Boring Bar
1. IMPORTANT – Check to be
sure that the valve is fully closed.
2. Screw together the proper
inserting tool and the valve or
plug to be inserted. Lubricate
these threads and check to be
sure these threads screw together
freely without binding. When using
an E-Z Release® inserting tool,
also lubricate and check the acme
threads between the two parts of the
inserting tool. (H.)
3. Slide drift pin in boring bar socket
so that the head end is exposed.
4. Insert the shank of the inserting
tool into the socket of the boring
bar. Align the keyway in the tool
shank with the key inside the socket
of the boring bar.
5. Tighten tool-retaining screw.
6. Pull boring bar to the rearmost
position in the feed cap.
7. Coat the inlet threads with non-
hardening pipe thread sealant or
Teflon®tape (I.)
8. Replace the feed cap with the
complete boring bar assembly onto
the cylinder of the machine and
tighten.
A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
7
4. With the tool completely in
the cylinder close flop valve by
turning hand wheel as far as it will
go counter-clockwise and hold
momentarily.
5. With the other hand quickly close
the bypass valve by turning the
hand knob clockwise. This relieves
the pressure in the cylinder and
holds the flop valve closed.
6. Unscrew the feed cap and boring
bar assembly.
7. Loosen the tool retaining screw
on boring bar, but don’t remove.
8. Strike the drift pin on the head to
loosen the combined drill (or shell
cutter) and tap.
9. Remove the combined drill (or
shell cutter) and tap.
Remove The Tool
1. If hand ratchet was used, reverse
the ratchet handle by adjusting it
for counter-clockwise rotation.
Rotate the ratchet handle counter-
clockwise carefully and back out
the tool. DO NOT force the tool
when removing it, as this may cause
breakage of the tap teeth.
CAUTION: When this machine
is under pressure, water pressure
from the main will create a piston
action against the boring bar
and it will tend to rise force-fully.
Keep head and body clear of
ratchet handle and end of boring
bar. To avoid possible bodily
injury or damage to the machine
that could result if the boring
bar is allowed to move upward
without constraint, MAINTAIN
CONTROL OF THE BORING
BAR AT ALL TIMES with firm
downward force on the ratchet
handle or power operator.
2. If power operation has been
used to make the tap, stop power
operator momentarily, then reverse
the motor and back out the tool.
Control upward movement of the
boring bar by maintaining a firm
hold on the gear case and motor as
stated in previous caution note.
3. When the tap is entirely free from
the pipe, withdraw the boring bar
to the uppermost position again
applying some downward force to
prevent uncontrolled withdrawal of
the boring bar. When the pressure
in the pipe is greater than 90psi,
use the power clevis to control the
withdrawal of the boring bar.
a) Hook the bent end of the
power clevis over the feed cap
handles.
b) Adjust the screw so that the
point on the end is in the center
hole in the end of the boring bar.
c) Turn the screw to move the
boring bar as required.
G.
H.
I.
!

A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
8
3. Turn the ratchet handle counter-
clockwise to take out the play and
strike the end of the hand a sharp
blow counter-clockwise with the
palm of the other hand. (J.)This will
release the threaded connection
between the inserting tool and
the valve or plug. If using on E-Z
Release® inserting tool, this will
release the threaded connection
between the two parts of the
inserting tool.
4. Rotate ratchet handle counter-
clockwise until inserting tool is
completely free.
NOTE: If there is full pressure
flow from the bypass release
valve, the inserting tool has not
released and the valve or plug
should be screwed in again a little
tighter than before and another
attempt be made to release the
inserting tool.
Insert The Valve Or Plug
1. Hold boring bar in uppermost
position and turn bypass valve hand
knob counter-clockwise, which will
equalize the pressure above the flop
valve.
2. Open the flop valve by turning the
hand wheel clockwise.
3. Assemble ratchet handle onto
boring bar and set mechanism for
clockwise rotation.
4. Push the boring bar down until
the inlet threads of the valve or plug
contact the threads in the pipe. For
pressure greater than 90 psi use
a power clevis to force the boring
bar down. See Instructions “F-3” for
power clevis assembly instructions.
5. Adjust the feed nut and yoke and
place feed yoke over the collar on
the boring bar.
6. Insert the valve or plug into the
tapped hole by rotating the boring
bar clockwise and carefully feeding
downward with the feed yoke by
turning the feed yoke clockwise.
After the threads have taken
hold in the pipe, the yoke may
be permitted to drop off the collar
except when inserting in thin wall or
asbestos-cement pipe, or under high
pressure.
7. Screw the valve or plug into the
tapped hole until it feels solid.
IMPORTANT: DO NOT attempt to
force it to its permanent tightness
by means of the machine.
Release The Inserting Tool
1. Turn the bypass valve hand
knob clockwise which will release
the pressure from the machine
and indicate the tightness of the
connection between the valve or
plug and the pipe.
2. Reverse the mechanism so that
the ratchet handle will operate in a
counter-clockwise direction.
J.
K.
Remove The Machine
1. Loosen the chain nuts.
2. Unhook the chain.
3. Remove the machine, saddle and
gaskets.
4. Tighten the valve or plug into the
pipe permanently with a flat wrench
on the valve body. (K.)
5. If using an E-Z Release®inserting
tool, remove the nut part from the
valve.

A-3TM Drilling and Tapping Machine
Installation and Operating Instructions
9
10. Tighten tool-retaining screw.
11. Pull boring bar to the rearmost
position in the feed cap.
12. Replace the feed cap with the
complete boring bar assembly onto
the cylinder of the machine and
tighten.
13. Turn bypass valve hand knob
counter-clockwise.
14. Push the boring bar down
and engage the two parts of the
extracting tool by rotating the boring
bar counter-clockwise.
15. Carefully align the machine
and tighten the chain nuts without
binding the boring bar.
16. Again rotate the ratchet handle
counter-clockwise which will
fully engage the two parts of the
extracting tool and continued
rotation will unscrew the valve or
plug from the pipe.
17. Slowly raise boring bar, close
flop valve by turning the hand wheel
counter-clockwise, and close the
bypass valve by turning the hand
knob clockwise.
18. Proceed with the use of
the machine following previous
instructions.
CAUTION: Once the valve or
plug threads separate from the
pipe and the machine is under
pressure, water pressure from the
main will create a piston action
against the boring bar and it will
tend to rise forcefully. Keep head
and body clear of ratchet handle
and end of boring bar. To avoid
possible bodily injury or damage
to the machine that could result
if the boring bar is allowed to
move upward without constraint,
MAINTAIN CONTROL OF THE
BORING BAR AT ALL TIMES
with firm downward force on the
ratchet handle.
To Remove A Valve Or Plug
Installed In A Pipe Under
Pressure
1. Shut off the valve.
2. Disconnect service line piping.
3. Slightly loosen the valve using a
wrench on the inlet side.
4. Separate the two parts of the
extracting tool.
5. When using an extracting tool
having inside threads, screw the
nut onto the outside threads of
valve very securely using the right
hand thread. (L.) When using an
extracting tool having outside
threads, screw the plug into the
inside threads of valve or plug
very securely using the right hand
threads.
6. Unscrew the feed cap containing
the boring bar assembly from the
cylinder on the machine.
7. Open the flop valve by turning the
hand wheel clockwise.
8. Assemble the large saddle
gasket, saddle, small saddle gasket
and the body and cylinder of the
machine centrally over the installed
valve or plug. Chain hook nuts
should be only hand tight. See
instructions “Attach The Machine to
The Pipe” section on page 5.
9. Insert the shank part of the
extracting tool into the socket of the
boring bar. Align the keyway in the
tool shank with the key inside the
socket of the boring bar. (L.)
L.
!

A-3TM Drilling and Tapping Machine
Parts Information
10
1
5
7
9
15
11 12 13
14
33
6
34
2
810
20
21
22
23
24
25
26
27
19
18
17
32
40
34
37
39 38
44
52
36
42
41
31
53
50 49 48
35
45
43
46
47
30
29
28
51
54
55
56
57
16
58
59
60
61
62
63
64
65
66
68
70
71
67
69
72

   
1 86391 Handle extension
2 85308 Ratchethandlecomplete
3 88366 Cuttinggrease
4 90322 Allen wrench
5 40028 Chain nutwrench
6 40205 Chisel
7 75409 Wrench
8 46029 Boring bar nut
9 40004 Ratchetdog
10 40137 Ratchetwheel
11 40007 Spring
12 40006 Spring pin
13 502027 Rollpin
14 502025 Pivot arm
15 502026 Pivot arm spring
16 40211 Chain hooknut
17 40212 Chain hookwasher
18 502029 Lock nut
19 502028 Operatingscrew
20 40213 Chain yoke
21 89099 Chain hook
22 48130 Friction collar rollpin
23 5031 49 Feed sleeve
24 85318 Chain for 6”-16” mains
25 41435 Oil plug
26 45374 Feed sleeve O-ring
27 98430 Set screw
28 58849 Handwheelnut
29 58519 Handwheel
30 40193 Stem packingnut
31 58461 Stem packingwasher
32 40194 Valve stem
33 503147 Valve body
34 40189 Cap gasket
35 42042 Seat washer
36 40049 Seat nutwasher
37 40043 Hand knob
38 40044 Hand knobscrew
39 40048 Seat nut
40 40045 Stem
41 40047 Screw
42 40195 Gate arm
43 40203 Gate screw washer
44 580967 Boring bar assembly
45 62501 Tool retainingscrew
46 40200 Seat washerscrew
47 40197 Gate washer
48 40198 Seat washer
49 40196 Gate
50 40013 Stem set screw
51 40202 Gate-to-armscrew
52 40023 Yoke retainingpin
53 40229 Small saddlegasket
54 40230 Large saddlegasket
55 58093 Cylinder
56 56694 Retaining pin
57 40015 Drift pin
58 503148 Cap
59 40020 Handle
60 501273 Boring bar wiper ring
61 51458 Boring bar O-ring
62 580610 Friction collar
63 580898 Feed yoke
64 50133 Washer
65 79745 Retaining screw
66 500851 Detent
67 59810 Detentspring
68 40139 Stud
69 305006 Detentscrew
70 40138 Bolt*
71 80111 Handle bar
72 46255 Nut*
*Order both parts when replacing either one.