Operator’s manual for the Pentruder MD1 Modular Drill System with MDU9 Modular Drive Unit - Original instructions
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d. Tighten the upper bolt loosely.
e. When the track is in the right position,
tighten the bolt properly.
f. Next tighten the upper bolt on the back brace.
g. Tighten the lower bolt on the back brace.
Pictures a-h: Mounting track on base plate