C 2500 Suburban 2WD V8-454 7.4L (1994)
Knockout Tool Components
4. Frame bracket knockout using tool J 38794.
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Do not distort frame bracket when removing knockout.
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Apply extreme pressure lubricant to the threads of the T-bolt and insert the bolt through the knockout hole in the bracket support.
Knockout Too Intalled Inside Bracket
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Install bridge onto T-bolt. The forward bracket requires the bridge to be installed between the legs of the bracket due to access problems.
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Assemble the bridge, bearing (chamfered side out), washer, and nut in order.
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The T-bolt head and bridge must line up horizontally with the knockout; the bridge should span the knockout without interfering with the
knockout procedure.
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Tighten the T-bolt head against the knockout by turning the nut at the opposite end using a socket and torque wrench.
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An open end or adjustable wrench may be need to prevent the T-bolt fro losing horizontal alignment with the knockout.
NOTICE: Do not subject the tool to more than 100 N.m (75 lbs. ft.) torque. Exceeding the recommended torque may damage the tool and/or
bracket.
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If the torque limit on the T-bolt is met and the knockout does not break free, use a die grinder of appropriate size. using the stamped outline as
a guide, remove the knockout. (Remove the wax coating in the knockout area to make the preforation lines more visable).
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If the outline is not visable, use the T-bolt head installed horizontally, as a template, and scribe the frame bracket.
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Repeat the procedure on the other upper control arm frame bracket.
Install or Connect
