Autoquip FREIGHTLIFT FLT - Manual (Page 38)

38
INSTALLATION INSTRUCTIONS
WARNING!
Do not weld on the guide flanges of the masts. The field welding of
any structural steel member into or across the guide beams in the
path of the wheel guides is strictly forbidden. Interfering with the
free travel of the wheel guides could create severe structural
damage or cause the lifting chains to over-stress and fail resulting
in permanent lift damage and/or severe injury to personnel
D. SPLICED BEAMS (when used)
1. Set the upper mast on its respective lower mast in the orientation shown on Figure
19, taking necessary precautions not to bend or damage transition plates.
2. Verify that the two mast beam pairs are true, straight, and plumb within 1/4” over the
entire length of the beam. NOTE: This tolerance may not be exceeded or immediate
& permanent damage to the cam followers will occur. (Shim material by installer).
3. Once both beams are verified to be straight & plumb within 1/4", permanently weld
the upper & lower mast assemblies together as shown. Weld distortion to the beams
must be minimized to hold the required tolerance to beam straightness.
NOTE: Care should be exercised not to distort the masts from welding,
and alignment is critical. The flanged cam followers run on the front
flange of the mast beams, and the cylinder stabilizing pads run on the
inside of both mast beam. These areas must be ground smooth after
welding the beams, failure to do so will cause the cam followers to fail
prematurely.
NOTE: Beams must be plumb and parallel within 1/4” overall before
proceeding with permanent bracing.
4. After you have completed the splice you may need to install extra bracing from the
top section of the beam splice, back to the landing brace area. This will make the
spliced section of beam stronger and prevent the welded area from flexing, which
could cause the welds to fail.