General Machine Products 70646 Jamb Skids - Manual (Page 2)

Page 2 of 4 www.gmptools.com General Machine Products Co., Inc.
This equipment should be used only by personnel who have been given the appropriate training
and who are competent to use it.
These instructions are to be made available to operators of this equipment at all times. Failure to
observe these safety instructions could result in serious personal injury and/or property damage.
1. Lower the lower section of the Jam Skid into the manhole.
Rotate the locking foot pedal to the unlocked position
(figure A).
2. Align the center of the jam skid with the
center of the duct.
3. Lower the upper section into the man-
hole and install the upper section into
the lower section.
4. Raise the upper section so the swivel
bracket rests under the lip of the
manhole and the entire jam skid
rests at an angle of approximately
75° from the floor.
5. Install a locking pin to secure the 2
sections.
6. Using the 2nd locking pin install a
sheave or quadrant of suitable
size for the cable between the
jam skid legs and align with the
duct.
7. Secure the jam skid by moving the
base in or out slightly while pressing down on the locking foot
pedal until the locking foot pedal fully engages (B).
unlocked
A
fully engaged
and locked
B
INSTALLATION
REMOVAL
1. Place leverage bar under
locking foot pedal and pry up
to release the Jamb Skid.
2. Remove the Jamb Skid by
reversing the installation pro-
cedure.