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9.5
Put the Chain (Chart 13 item D-6) of the Level and Support Device into the Level
and Support Device connection located on the upper portion on the Main Block.
9.6
Rotate the Crank handle (Chart 13 item D5) clockwise or counterclockwise until
the tee is at the desired Hi-Lo to the outside or inside diameter of the mating
pipe, fitting or valve.
9.7
Loosen the Thumbscrew (Chart 10 item B7) in the Main Block and move the
Universal Jackbars to the side of the weld where it is needed and retightened
the Thumbscrew.
9.8
Check the fit-up pipe and the mating tee to find the section of the two parts that is the farthermost point from
pipe centerline. Tighten the Jackscrew over that point until the outside or inside diameters of the pipe and Tee are
in alignment. This process may need to be repeated with several of the Jackbars until the correct alignment or
reforming is accomplished. It will be necessary to loosen the Jackscrew(s) opposite the high point to bring the
outside or inside diameters of the pipes into alignment.
Note:
To check HI-LO on the inside or outside diameter pipes, the best tool to use is the Mathey Dearman Q. C.
Welders gauge. English – D253E, Metric – D253M.
9.9
The pipe and tee are now ready for welding.
10.0 – INSPECTION OF CHAIN CLAMP SUBASSEMBLIES
Equipment Required:
•
Straight Edge
•
Small Magnifying Glass
•
Threat Gauge: 7/8 – 9NC Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in Jackbars in
DD-500, DC-500S, DC-600S and DC-820)
•
Thread Gauge: 5/8 – 11NC grade 8 Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in
Jackbars in DA-500S, DB-500S, DA-820, DB-820, DA-600S and DB-600S.
•
Thread Gauge: 3/8 – 16NC grade 8 Allen Head Cap Screw x 2” long (Used to test the thumbscrew hole for
Chain Lock in DD-500, DC-500S, DC-600S, DC-820, DA-500S, DB-500S, DA-820, DB-820, DA-600S and DB-600S)
•
Thread Gauge: 1/4 – 20NC grade 8 Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in Main
Block)
•
12” machinist’s rule
•
6” dial calipers
Note:
Only Grade 8 Allen Head Cap Screws should be used for the Thread Gauges, as these are most resistant to
wear and tear.
WARNING:
To avoid injury the Level and Support Device should never be used as the sole
support of the mating Tee.
WARNING:
The mating pipe, fitting or valve should not
have a taper surface of more than 7 degrees at the point
where the pad of the Jackscrew will contact the pipe.
