USMOWER EX30 Manuale utente
Operator’s Manual
Flail Mower
11949 Westar Ln
Burlington, WA 98233
360.757.7555
www.usmower.com
US Mower Rotary and Flail Mowers for Excavator and Skid Steers are used by com-
mercial mowers for industrial mowing applications such as: land clearing, pipeline main-
tenance, ditch maintenance and general herbicide free vegetation management. We of-
fer Rotary Mowers and Flail Mowers for both Skid Steers and Excavators as well as
Complete Tractor Integrated Mowers for Case, John Deere, New Holland, Challenger
and McCormick. US Mower equipment is manufactured to have a long, productive ser-
vice life. Many contract mowers have reported 5,000 or more hours of working time
on their mowing equipment. The very rst ail mower built in 1999 is still in use today.
All US Mower ail mowers and rotary mowers are designed and manufactured in Burling-
ton, WA. From idea to nished project, it all happens right here in our USA factory. Each
design feature, material and component is carefully selected to provide the best per-
formance and value to our customer. We know that a ail or rotary mower is a big in-
vestment to our customer, so we make it from high strength steel, DOM tubing, and other
high quality components. We also service and stock each component to build the mow-
ers and our customers can purchase them direct form US Mower or one of our fantas-
tic dealers located throughout the USA and Canada. Because we are a fabricating man-
ufacturer, we can also make custom mounts, a variety of options and special requests.
Creating Mowing Solutions Manufactured in the USA
THE WAY:
US Mower ail and rotary mowers are designed and manufactured in Burlington, WA. Founded in 1999, US Mower’s commit-
ment to our domestic design, fabrication and assembly of our ail and rotary mower heads is steadfast. Our team at US
Mower is decades strong giving our customers and dealers the best service possible.
US Mower equipment is manufactured to have a long, productive service life. Our products are built with Precision in-house
bending, Expert tting, and industry leading welds. The electronic and hydraulic components are also designed and assem-
bled in house providing the ultimate t and function.
US Mower rotary and ail mowers for excavators and skid steers are used by commercial mowers for industrial mowing
applications including land clearing, pipeline maintenance, ditch maintenance and general herbicide free vegetation manage-
ment. The very rst ail mower built in 1999 is still in use today.
US Mower offers complete tractor integrated mowers for Case, John Deere, Kubota, New Holland and Masse Ferguson
tractors. From delivery of the tractor to our facility in Washington, every customer receives our complete attention to the
details that matter for your application. Our staff will understand your goals for the nal product and deliver to your specs
from the quotation phase to completion of your mower.
The team at US Mower understands that a ail or a rotary mower is a big investment whether on a single excavator or a
eet of tractors.
It is our motto to build:
“Proven, reliable implements built with superior fabrication for maximum productivity. Domestically built and sup-
ported by our committed team delivering genuine, personalized service.”
And we stand by it-faithfully.
360.757.7555
www.usmower.com
Read the safety messages on the implement and in your manual. US Mower has designed this implement to be used with
all its safety equipment properly attached to minimize the chance of injury in the event of an accident. There is no substi-
tute for an informed, cautious, safe-minded operator who recognizes potential hazards and follows good safety practices.
• Study Operator’s Manuals and Safety Decals for Excavator and cutter thoroughly to prevent misuse, abuse and accidents.
• Do not allow riders on Ecavator or implement. Falling off may cause serious injury or death by being run over by Excavator
or cutter. Keep Children Away!
• Operate with ROPS and fastened seat belt to prevent injury and possible crushing death from falling off or Excavator
overturn.
• Wear hard hat and safety glasses for personal protection.
• Make certain that SMV sign, warning lights and reectors are clearly visable.
• Turn Machine off. Block up or support cutter securely before putting hands or feet under or working underneath lifted com-
ponents to prevent crushing injury or death from sudden, inadvertent dropping. Make certain area is clear before lowering.
• Follow local trafc codes. Slow down at night, in turns, and on hillsides.
• Before dismounting, secure implement in transport position or lower to Ground. Disengage Interlock, Turn off machine.
Never mount or dismount a moving vehicle to prevent crushing injury or death.
Failing to follow safety messages and operating instructions can cause serious bodily injury or
even death to the operator or others in the area. Your mower is a powerful industrial machine
with substantial capacity to cause property damage, personal injury or even death when used
improperly or without proper safety equipment.
BEFORE YOU START!!
Safety
In addition to the design and conguration of equipment, hazard control and accident prevention are
dependent upon awareness, concern and prudence. suitable training of personnel involved in the op-
eration, transport, maintenance and storage of equipment is required.
Safety
• Dress for the job. Choose close-tting clothes and long pants, hearing protecttion, eye protection, work boots with traction and
heavy gloves (when handling blades). Do not wear loose-tting clothes or jewelry, which can get caught or hung up on a machine
and cause injury.
• Know your machine. Read the operators manual to familiarize yourself with your machines unique features. For example deector
shields, adjustments, skid shoes, retention systems and maintenance.
• Read warning labels and check safety features. Never operate your mower if your safety guards and devices are not in place. Re-
place safety guards and devices if damaged or not operating properly.
• Stop mowing if passersby are within 50 yeard radius from mower head.
• Never allow children to operate, ride on, or come close to mower or equipment. Never lift a person or allow anyone to stand on a
mower head. Keep bystanders and pets clear and off of equipment.
• Extreme care should be taken when operating near loose objects such as gravel, rocks or general debris. These objects should be
removed or avoided to prevent injury from thrown objects. Where grass and weeds are high enough to hide debris that could be
struck by the blades, the area should be inspected and large debris removed. Mow cleared area at an intermediate height, inspect
closely for remaining debris and remove. Mow again at desired nal height.
• Keep the mower head at least 10 feet from electric lines and pipe lines to prevent accidental contact and possible serious injury or
even death.
• Pressurized hydraulic uid can penetrate the skin causing serious injury. Do not use your hand to check for leaks on a pressurized
system. Use a piece of cardboard or paper to search for leaks. Stop the engine and relieve pressure before connecting or discon-
necting lines. Tighten all connections before starting the engine or pressurizing lines. If uid is injected into the skin, obtain medical
attention immediately.
• Check attachment points. Check your mower’s connection to the power unit. All pins, bushings and linkage should be checked to
insure they are free to travel the full distance without interference. Repair if necessary.
• Conduct daily inspections. Verify that all shields and guards are in proper working order. Check blade attachment bolts to insure
all blades are present and in good condition. Check blades for cracks around bolt hole. Check that hydraulic hose connections are
completely engaged.
KNOW YOUR OPERATING SAFETY ZONE!!
Before starting the operator should read and understand the owner/operation manual for the
parent implement to determine the proper procedure for turning on the auxiliary hydraulics to
run the mower.
Mounting the mower
After removing the bucket from the stick by disconnecting the quick attach mechanism install the mower in it’s place. The mower with its’
mount should readily attach in place of the bucket. Conrm that the locking mechanism is properly engaged. Install the case drain line
and then, attach the supplied hoses with quick couplers to the auxilary circuit lines on the excavator. Make sure that the quick connect
couplers are completely engaged and locked.
Case drain line, what and why is it needed?
The case drain protects the motor shaft seal from excessive pressure. Motor shaft seals are usually rated to 100 psi for brief periods
or less than about 50 PSI continuously. High pressure oil from the gear section travels between the shaft and its sleeve bearing to an
area behind the shaft seal. Through the return line by way of an internal check valve or through an external case drain. In most compact
equipment return line pressure is high enough to cause either abrupt seal blowout (150+ psi) or early failure of the motor shaft. Higher
pressure seals are available, but are not always reliable and cause other problems as well.
The best solution is a dedicated case drain. Your machine may have an internal or external case drain system that can accommodate the
small volume of gear motor case ow. Contact your vehicle dealer or manufacturer for technical details.
Motor shaft seals are not covered under warranty if case drain is not properly installed or fails. Make sure
case drain line couplers are properly connected.
There are obvious and hidden potential hazards involved in the operation of this mower. Serious injury
or death may occur unless care is taken to insure the safety of both the operator and other persons
in the area. The following is a list of some safeguards which should be followed.
Operating Safety Zone---50 Yard Radius from Mower Head
Stop! And allow all vehicles to pass through operating “Safety
Zone” before continuing cutting. Operator awareness is key
to safe operation. Never operate or continue to operate this
machine when there is a person or vehicle within a 50 yard
radius of the cutting operation. If a person comes inside your
operating “Safety Zone” (50 yard radius) shut the machine
down.
KNOW YOUR OPERATING SAFETY ZONE!!
Installation
Attaching Mower to Excavator
• Securely attach the ail mower in the same manner you would attach a bucket or other excavator attachment. Conrm that the
locking mechanism is properly engaged.
• Carefully clean the Hydraulic quick couplers before making connections. Dirt quickly damages the hydraulic system. Always cover or
connect couplers together when not in use.
• Connect supply, return and case drain lines. Conrm that the hydraulic quick couplers are fully engaged and locked by turning the
collars. Check with your power units manuals on how best to release the pressure in the auxiliary lines for easy coupling to the
connectors.
• Activate the auxiliary hydraulic circuit with the cutter head raised off the ground.The cutter shaft should turn freely and smoothly.
Mowing with the Excavator Flail
Techniques vary with the operator and the mowing task. however, the factors below should be kept in mind.
• The mower is fragile compared to an excavator bucket. The bucket is designed to with stand very high digging force. The mower will
crumple with any substantial fraction of that. Keep in mind that excavator mowing requires a light hand. Do not push on the mower
head to move the excavator or to push objects.
• It is particularly important to avoid pushing with the ail shaft. Keep the ail shaft and blade towers clear of solid objects. Let the
blades do the cutting. Bending the ail shaft will result in vibration that requires remanufacturing the shaft to x. Do not continue to
mow with a severely bent or unbalanced shaft.
• Good performance depends on the free swinging of the blades. The two pound blades can sever 4 inch diameter soft wood with one
hit of one blade. forcing the ail into vegetation, such that the blades are held against the ail shaft, slows mowing. Keep the blades
swinging.
• The ail mower is designed to cut all types of grasses, brush and small trees. The ground conditions and the type of brush being cut
will determine the best cutting procedure and ground speed.
• Sharp blades make a substantial difference in cutter efciency. This is most noticeable in heavy conditions when the mower is oper-
ating at capacity. Running the blades into rocks or other hard objects will blunt blades and will reduce mowing capacity.
Flail mowers can be equipped with cut height adjusting roller for brush cutting at ground level. For brush cutting at higher levels, includ-
ing canopy mowing, The roller is best left off.
Cutter shaft should be run at 1800 to 2000 rpm.
Clearing brush in an open area
• Position the excavator at a starting point. Set the height of mower head so the brush is less than about 2 feet above the top of the
mower. Swing the mower through the brush matching the swing speed to the performance of the mower. Over feeding the mower
will drag down cutter shaft speed reducing mower efciency. Lower the head and swing again. Repeat until desired cut height is
reached.
Canopy Mowing & Trees
• Canopy mowing requires rotating the head so that the ail is upside down and positioned upward, the level of the canopy to be cut.
Turning the cab from side to side while moving the excavator forward, one can readily mow the underside of a tree canopy.
• Tree mowing is generally best done by rst running the ail head up and down the trunk removing the branches. If the tree is not
too large, positioning the head at the top of what remains of the trunk while working the head up and down can reduce the trunk to
little more than a stump. Bear in mind, however, that the ail is not a chipper or stump grinder. Its ability to do this kind of cutting is
limited by the hardness of the material.
Operation
Frequent and routine maintenance procedures should be followed to ensure the safe and efcient operation
of the mower. The following procedures should be performed every 8 working hours. Under severe condi-
tions this schedule should be accelerated.
• Check free end bearing and bearing housing for excessive heat: indicating loss of lubrication or possible bearing damage.
• Check blades, blade bolts, nuts and towers for excessive wear, chipping or cracking.
• Grease bearings: free end ~4 pumps every 4 hours — drive end until grease comes out the breather
• Check hydraulic lines for damage and leaks.
• Clean debris, leaves, grass and sticks from inside shroud and or rollers.
• Check bolts and nuts on all mountings and optional equipment.
• Check depending on your options: gates, shields, shroud and rollers etc. Repair if damaged or replace if necessary.
Lubrication
The drive end bearing housing has a grease zerk and a grease vent plumbed to the surface of the mower enclosure. The amount needed
varies with ambient temperature and mowing load. Generally greasing twice a day is sufcient for heavy operation. A good quality
NLGI#2 lithium grease is usually satisfactory. If the bearing housing is pumped full of grease when cold, at rst run up after a cold ll,
a substantial quantity of grease will issue from the vent as the grease heats. This is normal. To reduce this, grease when equipment is
at operating temperature.
Inspect before mowing
Inspect cutter drum and knives. Inspect the blades for wear, damage & cracks. Inspect towers for cracks. Inspect blade bolts for wear
and tightness. Replace or repair any problem items immediately. Injury can be caused if a blade or tower is thrown from cutter shaft
while mowing.
Replacing bearings—free end
Removal
• Loosen the set screw that holds the collar of the bearing to the shaft.
• Unbolt the (4) bolts (7/16-14 x 1 1/2”) that hold the bearing in place.
• Clean dirt and rust from surface. Smooth off raised areas.
• Slide the bearing off the shaft. Because of rust or nicks on the shaft, a puller may be needed.
Installation
• Clean the shaft and bearing bore.
• Apply anti-seeze.
• Slide bearing in place.
• Install (4 ) bolts ( 1/2” -14 x 2 1/4”) and torque to 100 ft/lbs.
• Tighten collar set screws.
Replacing bearings—drive end
• Remove the hoses and the four bolts holding the hydraulic motor to the end of the bearing housing and remove the motor.
• Loosen the 3 set screws on the nut and remove the nut.
• Block up the cutter shaft.
• Remove the clamp ring that compresses the outer edge of the rubber disc.
• You should now be able to slide the bearing housing off the shaft. (A puller may be needed. Use motor mount bolts and push from
inside drive stub.
• When reassembling the housing, note the two ball bearings must be installed so that their thrust direction is back to back. (Numbers
on bearings should face each other.)
• Push seal into housing. Pressing seal is not necessary.
• This is also a good time to examine the rubber disc and shaft seal. Inspect for tears, wear or separation. Replace if damaged.
• When tightening Outer Clamp Ring through ISO Ring to head, tighten bolts just until rubber starts to bulge.
Maintenance
Installing the Compact Drive Nut
Do not use anti-size on the nut or drive stub.
Caution: Do not tighten set screws before installing nut.
• Thoroughly clean and degrease the threads on both the nut and the drive stub and set screws.
• Apply Blue Loctite to set screw and stub threads.
• Screw the nut onto the drive stub and tighten to about 40 FT/LBS
• Turn the shaft 2-3 full rotations.
• Loosen nut slightly and torque to 40 FT/LBS
• Torque again to 40 FT/LBS.
• Torque set screws to 160 IN/LBS.
Replacing blades and blade bolts
Your mower will be more efcient if running with sharp
blades. Blades may be turned around if one side is worn.
Blades should be replaced in sets to maintain cutter shaft
balance. Blade bolts, washers and bolt nuts should be exam-
ined and replaced if worn. Bear in mind that parts subject to
intense pounding will in time develop fatigue cracks.
Install the blade assembly as shown in the shaft diagram.
Note that if top lock nuts are used they should be threaded
onto the bolt such that the nut runs out of bolt threads. It is
the resulting thread jamming effect on the nut that holds it in
place against shock and vibration. This type of nut must be
driven to refusal with a 3/4” High power impact gun.
PARTS
PARTS
PARTS
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