A.) Align two Rubber Bumpers (#81) to the holes on the Main Base Frame (#1). Push two Guide
Rods (#9) into the holes. Install 19 Weight Plates (#62). To install the plates, hold the plate at
an angle and place between the two guide rods then drop it down. Make sure the grooves on
the plastic covers all face up. The plates should all interlock with each other. See diagram
below. It is strongly recommended to spray some lubricant such as WD-40 on the two
chromed Guide Rods (#9) to minimize friction.
B.) Insert the Selector Rod (#126) into the center hole on the plates. Slide the Selector Stem (#64)
onto the Guide Rods from the top. Align the holes and secure it with a M10 x ½ Allen Bolt
(#119).
C.) Insert the Weight Plate Selector Pin (#135) in between the plates to secure the rod. Make sure
the magnet on the pin faces upward.
D.) Attach the Top Socket Assembly (#8) to the top of the Guide Rods (#9). Secure the Top
Socket Assembly (#8) to the Upper Frame (#7) with two M10 x 2 ¾” Carriage Bolts (#103), one
4 ¾” x 2” Bracket (#78), two
∅
3/4” Washers (#127), and two M10 Aircraft Nuts (#132).
E.) Securely tighten all the nuts and bolts previously installed.
F.) Attach two M6 x 5/8” Allen Bolts (#122) to the Top Socket Assembly (#8). DO NOT over
tighten these two bolts.
DIAGRAM 2
5
STEP 3 (See Diagram 3)
Summary of Contents for MACH IV
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