General Machine Products 15472 User Manual
How to Use Your New...
Fiber Optic Pulling Capstans
Description & Use
Your new GMP Fiber Optic Pulling Capstan is a
versatile and highly productive tool for placing
fiber optic cable. It is based on GMP's accessory
approach to fiber cable placing that lets you use
your existing pulling equipment, winches and
capstan drives, without special modifications or
expensive new pulling equipment.
Virtually anywhere you have used a CR Collapsible Reel or RS Power Reel you can now use this
fiber puller. Its durable construction and minimum number of components give it a remarkably
long, trouble-free service life. The large working
diameter of the capstan translates into good pulling speed and you can pull with rope, tape, or pull
the fiber cable itself. This means that the Fiber
Optic Pulling Capstan can be used both as an end
puller or a mid-assist booster puller.
Any of these units can be easily mounted on a 27/16 in. (62 mm) diameter drive shaft with either
a bayonet or a cross pin type of connection.
IMPORTANT PRECAUTIONS
!
Before you begin placing cable, you should be
completely familiar with the control and operation of the vehicle, power take-off, winch or capstan drive controls and all of the other pulling
equipment you will be using. The operator should
never leave his position at the controls while the
pulling line is under load or the winch power
take-off is engaged. All members of the crew
along the entire length of the intended pull should
be in visual communication by hand signals or
voice communication at all times.
Make certain that all vehicles and trailers are secured with wheel chocks. Make sure your work
area is properly posted with signs, flaggers and
other advance warning devices in accordance
with company practices. Federal, State and local
regulations for the protection of the crew and the
public. You'll find everything you need in our
Safety Catalog.
If you are pulling from a drum shaft extension on
a bed winch, de-clutch so that the drum is in freespool, wind all of the wire rope onto the drum and
secure it using a winch line holder. This will keep
the wire rope from spooling off the drum and becoming entangled.
Do not stand inside of angles formed by the pulling line or cable. As much as possible, do not
stand where there is the danger of being struck by
the pulling line if it should fail or snag. Never
place hands on a moving pulling line. To prevent
entanglement in moving parts and possible serious injury, do not wear loose fitting clothing
when working around the winch, capstan, sheaves
and pulling line.
General Physical
Features
There are several models
of capstans available:
P/N 15470 P/N 15472 and
P/N 15479 each consist of
an aluminum alloy capstan
drum measuring 27-1/2 in.
(698 mm) outside flange
diameter and a 25 in. (635
mm) diameter X 5 in. (127
mm) wide working surface. The capstan drum is
bolted to an inner hub and
drive spindle by means of
three 1/2 -13 x 1-1/4 in.
cap screws with 3/4 in. (19 mm) hex heads.
P/N 15470 is a capstan mounted directly to the
inner hub and drive spindle with no torque limiting capability. With this unit the pulling tension
must be limited by means of a break-away swivel
or by limiting the hydraulic system pressure to
achieve a maximum allowable torque.
P/N 15472 is a capstan equipped with an integral
torque limiter between the driving spindle and the
inner hub. The torque limiter limits the pulling
tension to a calibrated maximum that has been set
at the factory to 600 pounds-force (2669 N).
P/N 15479 is a capstan equipped with an integral
torque limiter between the driving spindle and the
inner hub. The torque limiter limits pulling tension to a calibrated maximum that has been set at
the factory to 1000 pounds-force (4448 N).
P/N 70351 consists of an aluminum alloy capstan
drum measuring 34-3/4 in. (883 mm) outside diameter and a 32 in. (813 mm) diameter X 7-1/2
in. (191 mm) wide working surface. The unit is
equipped with an integral torque limiter between
the driving spindle and the inner hub. The torque
limiter limits the pulling tension to a calibrated
maximum that has been set at the factory to 600
pounds-force (2669 N).
P/N 70381 is same as 70351, but provides pulling
tension of 750 pounds-force (3336 N).
Setting Up for Pulling
First, mount the capstan to the 2-7/16 in. (62 mm)
drive shaft. Because of the combined weight of
the drive section and the capstan drum assembled
(see summary chart below) it is recommended
that two people mount the assembled unit.
Push the drive spindle onto the drive shaft and
rotate it counter-clockwise 1/8 turn until the bayonet pin locks.
Now wrap the pulling rope or tape around the
working surface of the capstan four turns in an
over-wind direction. This dissipates the pulling
tension of the pulling line across the capstan's surface area. When the appropriate signal comes to
begin the pull slowly start the driving shaft, rotating the capstan clockwise and gradually increasing the shaft speed until the desired line speed is
obtained.
Observe the lay of the pulling line on the capstan
surface for any binding that might occur as the
tape or rope enters and leaves the capstan. If binding begins to occur the line exiting the capstan
should be manually peeled off of the capstan.
Binding can often be minimized by changing the
angle of approach of the pulling line to the capstan. It is usually best to have the pulling line approach the capstan close to the inboard flange. As
the capstan rotates, the tape will move outward
along the working surface and exit the capstan.
If the pulling line tends to slip on the capstan surface due to excessive lubricant, make additional
wraps until slippage stops.
Torque Limiting Models P/N 15472; 15479, 70351
& 70381
The torque limiter is calibrated at the factory.
This pre-set value is
stamped onto the serial
number plate. It is recommended that the unit
be subjected to a static
line pull periodically to
cause the capstan to stall
and the torque limiter to slip
for about 30 seconds only.
This will verify that the torque limiter is functioning and has not become frozen due to lack of use.
This is best accomplished with a dynamometer
installed in line to verify the torque limiter setting. If the capstan stalls occasionally during pulling due to elevated tension levels this is sufficient
to assure the user that it is working properly
Re-calibration of the Capstan Torque Limiter
The simplest and most certain way to have the
unit re-calibrated is to return it to the
factory. Here it can be disassembled
by competent mechanics with the
proper tools, the parts evaluated
for excessive wear and replaced
or reconditioned as needed and
the re-calibration performed on
our certified test stand. Please
remove and return the clutch and
spindle assembly for calibration.
Include your contact information
and the size capstan the unit is to be
calibrated for. Factory turn around
will be within 5 working days or
sooner if your needs dictate.
Summary of Model Features
Working Dia Pull Weight
P/N In. mm Lbs-
force
15472
15479
15470
70351
70381
70471
70472
70473
70475
70478
*Models less torque limiter: Max rated load 1500 lbs 6672 N
25 635
25 635
25 635
32 813
32 813
32 813
32 813
40 1016
40 1016
40 1016
600 2669
1000 4448
n/a* n/a*
600 2669
750 3336
1000 4448
n/a* n/a*
600 2669
1000 4448
n/a* n/a*
new-
tons
lbs kgs
80 34
100 45
86 39
80 37
80 37
80 37
86 39
135 61
135 61
100 45
How To Reach Us
Our support lines are open every USA business
day from 8:00 a.m. to 5:00 p.m. eastern time.
To reach technical support call 1-800-345-6009.
Outside of the continental U.S. call 1-215-357-
5500 ext. 409
Our FAX is always available at 1-215-357-6216.
Our email address is info@GMPtools.com
General Machine Products Co., Inc.
3111 Old Lincoln Hwy
Trevose, PA 19053
GMP Manual
P/N 09208
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