4. Operation; 4.1. Breaking Chain (Pressing Out Link Pin); 4.2. Installing Chain Link Pin (Riveting) - Sealey VS779KIT Quick Start Manual

4. OPERATION

4.1. BREAKING CHAIN (pressing out link pin)
NOTE: This tool may be used for breaking all chain sizes from #25 to #520.
If working on cam chain be sure and cover chain tunnel with rag to prevent parts dropping down.
NOTE: The rivet head must be fully ground off first.
4.1.1. Select correct size breaking tip for the chain to be worked on, position spring as shown fig.1. (Anvil not used).
NOTE: If small 2.2 mm breaking tip is used you must also use the anvil (19) on end of alignment bolt (7) and anvil 2.2mm(18)
at position Z on the C body (6) (see fig.2) to prevent breaking the tip.
4.1.2. The anvil (19) screws onto the alignment bolt (7), the other (18) drops in place in C body (6) at position Z.
NOTE: Smallest breaking tip (2.2 mm) should be used on most cam chain.
3.2 mm breaking tip used on #25 or #35 chain 4.0 and 5.0mm breaking tip for most motorcycle drive chain (428 to 520).
4.1.3. Put tool over chain, breaking pin tip must be withdrawn at least 2mm into alignment bolt.
4.1.4. The end of the chain rivet should be held in position by the tool alignment bolt, and the tool body. Tighten the alignment bolt securely
against chain to hold chain in place.
4.1.5. Tighten extractor bolt with wrench or lever bar until the chain pin is pushed out completely.
4.1.6. The chain pin will drop out of the hole in the bottom of the tool. (If you don't feel the tip pushing down smoothly, check that the tip is
correctly lined up against the link pin. If not realign or you may break the breaking tip.)
4.1.7. Withdraw push bolt and breaking tip, loosen alignment bolt and remove.
4.2. INSTALLING CHAIN LINK PIN (riveting)
4.2.1. Fit riveting tip (15) into the tool and applicable anvil (16 or 17) into C body (7) at position Z.
4.2.2. Assemble the chain with the link to be riveted. New special rivet link pins must be used. The original pin must not be used.
DO NOT use a split pin type connecting link.
4.2.3. The pin must be pushed all the way through the chain link.
4.2.4. If the pin is hard to insert it can be pushed into place by placing chain into the tool with the riveting tip (15) withdrawn 2mm into the
alignment bolt and tightening the alignment bolt until the pin has been pushed through the link.
4.2.5. Ensure that an equal length of pin shows on each side of the link
4.2.6. Position the tool over the pin to be riveted, make sure riveting tip (15) is withdrawn 2mm into the alignment bolt and tighten the
alignment bolt securely against chain.
4.2.7. Tighten the push (extractor) bolt so that the riveting tip (15) flares the chain pin.
4.2.8. Both ends of the chain link pin should be flared so the pin is securely held in place. Repeat procedure on other link pin.
4.2.9. Withdraw the tool, from the chain; visually check that both chain link pins show the same flared ends and that the rivets on the side
plates are in alignment with side plates on either side.
NOTE: You may also use the press plates to push the top link plate onto the link pins, as shown in (fig.3).
4.2.10. Use the press plate with the two holes in the upper jaw (4 or 5) and the grooved press plate in the lower jaw (3).
4.2.11. It is also possible to use a combination of the riveting tip (15) and lower press plate as fig.4.
fig.2
© Jack Sealey Limited
fig.3
Original Language Version
fig.1
fig.4
VS779KIT Issue 2 (1) 29/03/23