LARSON 7500 User manual

LARSON Cable Trailers, Inc.
Model 7500
Manufactured by
LARSON CABLE TRAILERS, INC.
1141 Dakota Avenue North
Huron, SD 57350
605-352-9336
Toll Free: 866-250-7624
Fax: [phone]
E-mail: [e-mail]
United States Patent # 6,347,761
LARSON Cable Trailers, Inc.
Model 7500
Manufactured by
LARSON CABLE TRAILERS, INC.
1141 Dakota Avenue North
Huron, SD 57350
605-352-9336
Toll Free: 866-250-7624
Fax: [phone]
E-mail: [e-mail]
United States Patent # 6,347,761
LARSON CABLE TRAILERS, INC.
601 Lincoln Avenue NW
Huron, SD 57350
605-352-9336
Toll Free: 866-250-7624
Fax: [phone]
E-mail: [email protected]
Webpage: http://www.larsonct.com
March 2016

2
TABLE OF CONTENTS
INTRODUCTION............................................................................................................................................. 3
GENERAL INFORMATION AND DESCRIPTION ............................................................................................... 4
STARTING AND OPERATION.......................................................................................................................... 5
BEFORE STARTING..................................................................................................................................... 5
LUBE CHART .............................................................................................................................................. 6
HYDRAULIC LIFTING RACK SETUP ............................................................................................................. 7
REEL LOADING........................................................................................................................................... 8
HYDRAULIC REEL TURNER....................................................................................................................... 12
TRANSPORTING....................................................................................................................................... 13
WIRING DIAGRAM.......................................................................................................................................14
PARTS DIAGRAM ......................................................................................................................................... 15
MAINTENANCE SCHEDULE.......................................................................................................................... 19
HONDA ENGINE....................................................................................................................................... 19
DEXTER AXLE AND RELATED COMPONENTS........................................................................................... 20
TRAILER ................................................................................................................................................... 21
OPTIONAL ACCESSORIES ............................................................................................................................. 22
FIGURE-8 DEVICE.....................................................................................................................................23
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
LEVEL WINDING DEVICE..........................................................................................................................30
DUMPSTER ..............................................................................................................................................34
LOADING RAMPS..................................................................................................................................... 36
COLD WEATHER START KIT .....................................................................................................................37
PVC RACK ................................................................................................................................................ 38
SIDE ROLLER ............................................................................................................................................39
WARRANTY .................................................................................................................................................40
2
TABLE OF CONTENTS
INTRODUCTION............................................................................................................................................. 3
GENERAL INFORMATION AND DESCRIPTION ............................................................................................... 4
STARTING AND OPERATION.......................................................................................................................... 5
BEFORE STARTING..................................................................................................................................... 5
LUBE CHART .............................................................................................................................................. 6
HYDRAULIC LIFTING RACK SETUP ............................................................................................................. 7
REEL LOADING........................................................................................................................................... 8
HYDRAULIC REEL TURNER....................................................................................................................... 12
TRANSPORTING....................................................................................................................................... 13
WIRING DIAGRAM.......................................................................................................................................14
PARTS DIAGRAM ......................................................................................................................................... 15
MAINTENANCE SCHEDULE.......................................................................................................................... 19
HONDA ENGINE....................................................................................................................................... 19
DEXTER AXLE AND RELATED COMPONENTS........................................................................................... 20
TRAILER ................................................................................................................................................... 21
OPTIONAL ACCESSORIES ............................................................................................................................. 22
FIGURE-8 DEVICE.....................................................................................................................................23
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
LEVEL WINDING DEVICE..........................................................................................................................30
DUMPSTER ..............................................................................................................................................34
LOADING RAMPS..................................................................................................................................... 36
COLD WEATHER START KIT .....................................................................................................................37
PVC RACK ................................................................................................................................................ 38
SIDE ROLLER ............................................................................................................................................39
WARRANTY .................................................................................................................................................40
REPORTING SAFETY DEFECTS .............................................................................................................................42
TIRE SAFETY INFORMATION ..................................................................................................See Back of Manual
HONDA ENGINES WARRANTY...............................................................................................See Back of Manual
2
TABLE OF CONTENTS
INTRODUCTION............................................................................................................................................. 3
GENERAL INFORMATION AND DESCRIPTION ............................................................................................... 4
STARTING AND OPERATION.......................................................................................................................... 5
BEFORE STARTING..................................................................................................................................... 5
LUBE CHART .............................................................................................................................................. 6
HYDRAULIC LIFTING RACK SETUP ............................................................................................................. 7
REEL LOADING........................................................................................................................................... 8
HYDRAULIC REEL TURNER....................................................................................................................... 12
TRANSPORTING....................................................................................................................................... 13
WIRING DIAGRAM.......................................................................................................................................14
PARTS DIAGRAM .........................................................................................................................................15
MAINTENANCE SCHEDULE.......................................................................................................................... 19
HONDA ENGINE....................................................................................................................................... 19
DEXTER AXLE AND RELATED COMPONENTS........................................................................................... 20
TRAILER ................................................................................................................................................... 21
OPTIONAL ACCESSORIES .............................................................................................................................22
FIGURE-8 DEVICE.....................................................................................................................................23
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
FIGURE-8 FORK ASSEMBLY......................................................................................................................29
LEVEL WINDING DEVICE..........................................................................................................................30
DUMPSTER ..............................................................................................................................................34
LOADING RAMPS..................................................................................................................................... 36
COLD WEATHER START KIT ..................................................................................................................... 37
PVC RACK ................................................................................................................................................ 38
SIDE ROLLER ............................................................................................................................................39
WARRANTY .................................................................................................................................................40

3
INTRODUCTION
Congratulations on purchasing the best mobile cable dispensing system on the market. This
manual has been prepared to acquaint you with the LARSON MOBILE CABLE DISPENSING
SYSTEM (LMCDS) and its maintenance, setup, operation, and transport. Please note, this
manual contains important safety information that both you and others operating this trailer
must know. Please give your full attention to safety.
Here at LARSON, we have been burying cable for over 45 years. Several years ago we started
burying fiber optic cable. This was a whole new challenge since fiber can't be cut and spliced
when obstacles are met. We initially designed a figure-8 machine and reel winder for our cable
plow. However, when we came to an obstacle (oil road, shallow cables, etc.) our plow and the
entire crew were left figure-8ing. Efficiency was very poor.
We looked everywhere for a trailer capable of figure-8ing and rewinding. There wasn't a cable
trailer that had a bed or reel turner rugged enough for our needs.And most, if not all, cable
trailers we found had no suspension, slowing transport.
We designed and built the LMCDS to meet our needs. This trailer will also save you time and
manpower as you bury cable in a new and more efficient way.
We soon realized that the trailer we had developed was invaluable in other capacities as well.
So the LMCDS was created for those who desire a high-quality, self-loading, multi-purpose unit
for use on the utility job site.
When it comes to service, your LARSON Authorized Sales Representative knows your trailer the
best and is interested in your complete satisfaction. We invite you to return to your
representative for all of your service needs both during and after the warranty period.
This SAFETY ALERT SYMBOL indicates important safety messages in this manual. When
you see this symbol, be alert to the possibility of PERSONAL INJURY or EQUIPMENT DAMAGE.
Always store this manual in the paperwork holder of your trailer for future reference.
WARNING!Failure to read the manual and understand how to the safely operate this
equipment could lead to serious damage to property, equipment, or cable. It could also lead to
personal injury or death. If you do not understand the instructions in this manual, contact your
LARSON Authorized Sales Representative.
50+

4
GENERAL INFORMATION AND DESCRIPTION
The LMCDS 7500 has an overall length of 14 ft. with a 5 ft. by 6 ft. treated-wood flatbed for
hauling tools and small equipment to the job site. It will lift 7500 lb. reels of various sizes or
haul a mini-excavator, basements, pads, boxes, anodes, and other materials to the job site.
Even with a full payload, the trailer can be towed behind your vehicle at the regular posted
speed limit. The hydraulic system has a flow rate of 12 gallons per minute at 2000 psi, powered
by a 20-hp Honda engine. This allows the trailer to figure-8 and rewind cable at a rate up to
750 feet per minute. The reel turning rack is powered by a 2-speed orbital motor operated
from the control panel. The control panel swings 180oallowing the user to efficiently operate
the hydraulic system while monitoring the activity at the rear of the trailer. The hydraulic lifting
rack makes loading and unloading a one-man operation.
Standard accessories include: auxiliary hydraulic ports for powering other tools and
accessories, two bushings, two collars, one arbor, and extra hooks located on the back of the
lifting arms.
Additional accessories available include: a second arbor, additional bushings and collars,
loading ramps, dumpster, cold-weather start kit, tension brake, dielectric fluid, light kit, PVC
rack, A frame, side roller, level winding device, figure-8 device, hydraulically-powered
generator, and a remote control.

5
STARTING AND OPERATION
This manual covers most, but not all, of the features of your trailer. Separate owner's manuals
for the Honda engine and Dexter axles are also provided. Be certain you have full working
knowledge of all features before operating your trailer. Contact your LARSON Authorized Sales
Representative if you have questions or incomplete knowledge of your equipment's operation.
BEFORE STARTING
1. Check all fluid levels.
Oil in the engine. Note that the Honda engine has a low-oil shut off sensor.
Gasoline in the engine. Turn the gasoline on.
Hydraulic fluid in tank. The hydraulic fluid should be visible in the window on the side of
the tank. If not, add more hydraulic fluid.
Warning! Always check the hydraulic fluid before starting the engine.
Warning! Always make sure the hydraulic valve is open before starting the engine. The
valve is in the open position when the handle is in line with the hose. Starting the engine with
the valve closed will damage hydraulic pump. This valve should remain open unless you are
performing maintenance on the pump.
2. Check recommended air pressure in all tires
8" reel-turning tire: 20-25 psi
4" figure-8 tire: 6-8 psi
235/85R16E tires: 80 psi
3. Check the lights and brake system.
4. Ensure that the trailer is properly lubricated with all-purpose grease.Grease zerks are
located on the lower links, bushings, reel turning rack, reel lifting rack, hydraulic valve tray
pivot, and each end of the hydraulic lift cylinders. See the Lube Chart on the following page to
help locate these items.
5
STARTING AND OPERATION
This manual covers most, but not all, of the features of your trailer. Separate owner's manuals
for the Honda engine and Dexter axles are also provided. Be certain you have full working
knowledge of all features before operating your trailer. Contact your LARSON Authorized Sales
Representative if you have questions or incomplete knowledge of your equipment's operation.
BEFORE STARTING
1. Check all fluid levels.
Oil in the engine. Note that the Honda engine has a low-oil shut off sensor.
Gasoline in the engine. Turn the gasoline on.
Hydraulic fluid in tank. The hydraulic fluid should be visible in the window on the side of
the tank. If not, add more hydraulic fluid.
Warning! Always check the hydraulic fluid before starting the engine.
Warning! Always make sure the hydraulic valve is open before starting the engine. The
valve is in the open position when the handle is in line with the hose. Starting the engine with
the valve closed will damage hydraulic pump. This valve should remain open unless you are
performing maintenance on the pump.
2. Check recommended air pressure in all tires
8" reel-turning tire: 20-25 psi
4" figure-8 tire: 6-8 psi
235/85R16E tires: 80 psi
3. Check the lights and brake system.
4. Ensure that the trailer is properly lubricated with all-purpose grease.Grease zerks are
located on the lower links, bushings, reel turning rack, reel lifting rack, hydraulic valve tray
pivot, and each end of the hydraulic lift cylinders. See the Lube Chart on the following page to
help locate these items.
•Hydraulic fluid in tank. The hydraulic fluid should be visible in the window on the
side of the tank. If not, add more hydraulic fluid. (Use Mobil 424 or equivalent UTF -
Universal Tractor Fluid.)
•If the trailer is labeled for Dielectric Fluid, USE DIELECTRIC FLUID.
5
STARTING AND OPERATION
This manual covers most, but not all, of the features of your trailer. Separate owner's manuals
for the Honda engine and Dexter axles are also provided. Be certain you have full working
knowledge of all features before operating your trailer. Contact your LARSON Authorized Sales
Representative if you have questions or incomplete knowledge of your equipment's operation.
BEFORE STARTING
1. Check all fluid levels.
Oil in the engine. Note that the Honda engine has a low-oil shut off sensor.
Gasoline in the engine. Turn the gasoline on.
Hydraulic fluid in tank. The hydraulic fluid should be visible in the window on the side of
the tank. If not, add more hydraulic fluid.
Warning! Always check the hydraulic fluid before starting the engine.
Warning! Always make sure the hydraulic valve is open before starting the engine. The
valve is in the open position when the handle is in line with the hose. Starting the engine with
the valve closed will damage hydraulic pump. This valve should remain open unless you are
performing maintenance on the pump.
2. Check recommended air pressure in all tires
8" reel-turning tire: 20-25 psi
4" figure-8 tire: 6-8 psi
235/85R16E tires: 80 psi
3. Check the lights and brake system.
4. Ensure that the trailer is properly lubricated with all-purpose grease.Grease zerks are
located on the lower links, bushings, reel turning rack, reel lifting rack, hydraulic valve tray
pivot, and each end of the hydraulic lift cylinders. See the Lube Chart on the following page to
help locate these items.

If Trailer is Labeled
for Dielectric Fluid
use Dielectric Fluid
Fill to Sight
Gage with
Mobil 424 or
equivalent
Universal
Tractor Fluid

7
HYDRAULIC LIFTING RACK SETUP
1. Using the reel rack lever on the
control panel, lower the reel rack.
2. Pull the keeper pin out of the lifting
arm. Please refer to the Parts Diagram
for the location of the keeper pin.
3. Extend the lifting arm to the desired
length.
4. Replace the keeper pin in the lifting
arm.

8
REEL LOADING
1. Lubricate the hole in the reel
hubs.
WARNING! If the reel hubs are
not properly lubricated, the high
RPMs attained during figure-8ing
and rewinding the cable can
generate enough heat to deform
the arbor hole in the reel. The
deformed reel could stop turning
which could damage the cable.
2. Remove the arbor from the lifting
rack or storage tube.
3. Remove any locking collars and
bushings from the arbor. Lubricate
the inside of the bushing. Place the
bushing in the hole in the reel hub.
4. Slide a locking collar onto the
arbor with the flange facing the reel.