INSTRUCTIONS CM385E
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Page 7 of 12
Installation of Top Side Extensions
Top Cap Extension Assembly
Installation of Top Front and Back Extensions
Remove (4) side knock-outs from original top cap. Install (2) top side extensions, using (2) 5/16” serrated flange lock nuts on each extension
(there are pre-installed 5/16” press-studs in side extensions). Do not tighten side extensions until front and rear extensions are mounted and
aligned with original top cap. Top front and back extension installation is shown at the bottom of this page.
Remove Knock-outs
4 places
Side Extensions
5/16” Serrated Flange
Lock Nut
Remove the front and rear center key hole knock-out features from the original top cap. Attach (2) top front and rear extensions, using (4) #10-
32 nuts, (4) #10 lockwashers, (1) 1/4-20 carriage bolt, and (1) 1/4-20 serrated hex nut per extension piece (there are (4) pre-installed #10
press-studs in each extension). Align all top extension parts, leaving a minimal gap between side and front/rear parts. Ensure that all extension
components are flush with top cap. Secure side extensions by tightening (4) 5/16” serrated flange lock nuts.
Assembled
Rear Extension
Front Extension
See Detail View
#10-32 Nut (use 3/8” socket wrench)
#10 Lockwasher
Ensure that these
surfaces are flush
with top cap
See Detail View
1/4-20 Serrated Hex Nut
1/4-20 Carriage
(use 7/16” socket wrench)
(use 1/2” socket wrench)
Remove Center Key Hole
Knock-outs
Bolt
Assembled
