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I08-0403 11/2011
P/N 08-0403 BREAKER/RIVETING CONVERSION KIT &
For P/N 08-0066 CHAIN PRESS TOOL
Thank you for purchasing the Motion Pro Chain Breaker and Riveting Conversion Kit, P/N 08-0403. Combined
with the 08-0066 Chain Press Tool, it will break chains up to size #630, press master links up to size #532 and
rivet hollow-nosed master links on chains up to #630. For heavy-duty applications or for solid-nosed riveting
please refer to Motion Pro part number 08-0135 Jumbo Chain Tool and part number 08-0142 Quad Stake
Riveting Tool.
IMAGE A
A. Body, C08-058A D. Alignment Bolt, C08-058B G. Rivet Tip, 08-0062
B. Press Plates (set), 08-0067 E. 3.8mm Breaking Tip, 08-0061 H. Large Anvil, C08-058D
C. Handle F. Spring, C08-001D I. Push Bolt, C08-058C
• Read all instructions for each procedure before beginning. Improper use of the tool can
cause breakage.
• Make sure the tool is clean and apply grease to all threads before assembling and using. This will
help the tool operate more smoothly and allow you to feel tension when using the tool.
• When breaking drive chains larger than #520, it is recommended to grind off the rivet heads
first, if possible. This will significantly reduce the load on the tool and help prevent premature wear
or damage to the breaking tip.
• All tightening procedures are to be performed by hand only, using a 14mm wrench. Do not use
extensions or power tools of any kind or the tool may be damaged.
PAGE 1
BREAKING CHAINS
Philips screwdriver can
be used. Handle not
included in kit.
Push Bolt
Alignment
Bolt
Handle
Chain
Link
Body
Hole in tool Body
Push Bolt
Alignment Bolt
IMAGE B
Spring
Extractor
Pin
Alignment
Bolt
I08-0403 11/2011
Use only the correct breaking tip for your application, or you will damage the tip.
Included in this kit: 3.8mm Breaking Tip for drive chains #428 - #630.
Assemble the tool as shown in Image B and the diagram below for breaking chains. Thread the alignment bolt
into the body. Insert the breaking tip into the spring and drop them into the alignment bolt with the spring under
the tip head. Thread the push bolt into the alignment bolt above the tip.
Image B shows a drive chain in place.
1-Place the tool over the chain as shown in Image B. The breaking tip must be withdrawn at least 2mm into
the alignment bolt to clear the end of the chain pin. Do not withdraw the breaking tip too far into the alignment
bolt or it can get hung up inside the alignment bolt. One end of the chain pin will be held in position by the end
of the alignment bolt, while the other end is held in position by the hole of the tool body.
2-Tighten the alignment bolt securely against the side plate of the chain, but do not over-tighten or the
alignment bolt and tip could drift out of position. The alignment bolt is for aligning and supporting the breaking
tip, so do not attempt to break the chain with the alignment bolt retracted or you will damage the breaking tip.
3-Read this step all the way through before beginning. Tighten the push bolt by hand only with a Philips
screwdriver or a 14mm wrench until the chain pin is pushed completely out and through the hole in the tool
body. You will feel some initial tension as the chain pin begins to shear, but afterwards the breaking tip should
push smoothly into the chain link. IMPORTANT: If the chain pin doesn’t start to break free, or you don’t feel
the breaking tip going into the chain link smoothly, back out the alignment bolt just enough to check that the
breaking tip is correctly lined up with the chain pin. Once the breaking tip and chain pin are aligned properly,
tighten the alignment bolt back down and start over at the beginning of this step. Do not apply excessive force
or use air tools or you may damage the tool.
PAGE 2
Press Plate
with holes
Press Plate
with groove
Alignment Bolt
14mm wrench
New master
link between
Press Plates
I08-0403 11/2011
PRESSING SIDE PLATES
Assemble the tool as shown in Image C for pressing side plates. The alignment bolt will be threaded into the
body, with the breaking tip, spring and push bolt removed. The press plate with the holes will be inserted
into the alignment bolt, and the press plate with the groove will be placed in the hole in the tool body.
IMAGE C IMAGE D
1-Assemble the new chain with the master link, side plate and o-rings (if applicable) as specified by the chain
manufacturer. Position the assembled master link in the tool as shown in Image D. The side plate with the
pins will be placed against the grooved press plate, and the side plate with the holes will be placed against the
press plate with the holes.
2-Lightly hand-tighten the alignment bolt until the press plates touch the master link side plates. Check that the
master link chain pins are properly aligned with the groove and holes in the press plates before final tightening.
3-Using a 14mm wrench, tighten the alignment bolt until the chain pins protrude past the face of the side plate.
For clip type master links, the pins should protrude enough to install the clip into the grooves in the chain pin.
For rivet type master links, the chain pins should protrude enough to be properly flared over the side plate. A
simple technique is to measure the width of the side plates on an adjacent link with a caliper, and then press
the master link side plate on until you achieve the same width dimension.
* Refer to the chain manufacturer’s specifications for distance of chain pin protrusion, and direction
and installation of master link clips. All chains are different, and Motion Pro cannot provide the exact
specifications for your chain.
PAGE 3
RIVETING CHAIN PINS
Push Bolt
Alignment
Bolt
Rivet Tip inside Spring
inside Alignment Bolt
Large Anvil
Hole in
tool Body
Properly flared
chain pins
I08-0403 11/2011
Assemble the tool as shown in Image E for riveting hollow-nosed master link pins. Thread the alignment bolt
into the body. Insert the rivet tip into the spring and drop them into the alignment bolt with the spring under the
tip head. (Refer to internal diagram with Image B). Thread the push bolt into the alignment bolt above the tip.
Place the anvil in the hole in the tool body per Image G.
IMAGE E IMAGE F IMAGE G
1-The new master link side plates should already be pressed (see Pressing Side Plates) so that the chain pin protrudes
past the face of the master link’s side plate. Refer to the chain manufacturer’s specifications for the proper protrusion
distance. Do not attempt to re-use broken master links, or use a clip on a rivet type master link. Position the tool over the
chain pin to be riveted, with the hollow end of the chain pin facing the rivet tip, and the solid end facing the anvil.
2-Make sure the rivet tip is withdrawn enough to clear the end of the chain pin. Tighten the alignment bolt securely
against the side plate of the chain, but do not over-tighten.
3-Using a Philips screwdriver or a 14mm wrench, tighten the push bolt very tightly until the rivet tip spreads the hollow
nose of the chain pin. The end of the chain pin should be flared over the side plate just enough so that the side plate is
solidly held in place. Repeat this procedure on the other chain pin. The amount of flare of a rivet –type master link varies
among chain manufacturers. Some specify as little as 0.006” and generally no more than 0.028”. This is a very small
amount of flare. Do not attempt to flare the chain pin flush with the side plate, or the chain pin can crack and be
weakened, and you risk damaging the tool as well. Measure the un-flared chain pin with a caliper, and then check the
flare often with the caliper to insure you do not over-flare the chain pin. One turn of the push bolt equals one millimeter of
travel, so a typical flare will require less than a full turn. Image F shows a properly flared hollow-nosed master link.
4-Withdraw the tool from the chain, and visually check that both chain pins show the same size flares. Check that the
riveted-on side plate is in alignment with the side plates of adjacent chain links.
WARNING - It is very important that chain master links be clipped or riveted properly. Improper installation
can lead to great bodily harm or death. If you are unfamiliar or uncomfortable with this process, please have
your work supervised by a qualified technician or bring your vehicle to a qualified facility for repair.
PAGE 4
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