Generac K4080 User Manual
OPERATOR’S MANUAL
BRUSH MOWER
MODEL K4080
PLEASE READ THIS MANUAL CAREFULLY AND KEEP
READY A T ALL TIMES
KUBOTA®
CONTENTS
BEFORE OPERATION ——————————————————————— 1
SAFE OPERATION —-——————————————————————— 2-3
ATTACHING TO THE EXCAVATOR —-———————————————— 4-5
ADJUSTMENT & MAINTENANCE —————————————————— 6
BASIC OPERATIONS —-———————-—————————————— 7-9
MAINTENANCE ——————————————————————————10
REPLACING KNIVES——–————————————————————— 11
HYDRAULIC DIAGRAM ———–—–————–--———————————— 12
ATTACHMENT TRANSPORT -—————————————————–—— 13
TROUBLESHOOTING ———————————–—————————–——14
TROUBLESHOOTING (cont.) —————————-——————-———— 15
SPECIFICATIONS -–————————————–——————————— 16
KNIFE ASSEMBL Y —————————————–——————————— 17
DRIVE ASSEMBLY ——————————————–—————————— 18
HYDRAULIC PLUMBING———————————–——————————–-19
BEFORE OPERATION 1
BEFORE OPERATION
1. Keep children out of the operating area under the watchful eye of another responsible adult.
2. Never allow another person in the operator’s station of the excavator while
the machine is in operation.
3. Stop machine operation if a person approaches the mowing area.
4. The operator should walk through the mowing area to identify and locate hazards.
5. Hazards may include large stones, pieces of concrete, glass bottles, discarded wire & cable, discarded automotive parts, fence posts, or exposed
pipes.
6. Inspect the mowing area for utility lines and features such as electrical lines
and enclosures, water and sewer lines, or communications equipment.
7. Read and understand this manual and the excavator manual before operating
the mower.
SAFE OPERATIO N 2
SAFETY
Failure to heed these warnings may result in personal injury or death.
• Before operating this machinery read the owner’s manual carefully.
• Use OSHA approved eye, ear
and head protection to protect
the operator from any flying
debris and noise.
•
All personnel except operator should be 150 feet clear of machinery before starting
or operating it.
•
Never use drugs or alcohol before or while
operating your brush mower.
Be aware that operating equipment for an extended period of time can result in fa-
•
tigue or boredom and may cause the operator to lose awareness of what he/she is
doing. It is recommended that scheduled work breaks be taken to avoid this.
• Keep hands and loose clothing away from any power-driven parts.
• Avoid contact with hot surfaces including pumps, motors, hydraulic oil tanks and
hose connections.
• Do not operate this machine without all guards being in good condition and firmly in
place.
• Do not operate this machine on a excavator that is not properly maintained. If a
control failure should occur while operating this machine, immediately shut it down
and perform repairs before continuing.
• Be aware of the cutter drum rotation direction and do not let bystanders stand
within 150 feet to either side of the mower.
• Under no circumstances should the blades of this attachment contact the ground or
be curled up to where they are visible to the operator. Serious injury or death can
occur.
• Always walk the area to be worked to insure the jobsite is free of obstacles and de-
bris that could injure the operator or damage the machine.
SAFETY (cont.)
SAFE OPERATIO N 3
• Stop the operation of this machine when people or vehicle driver’s vision becomes
obscured, caused by the discharge of materials and dust. Also avoid operating this
attachment in unusually foggy or dusty conditions or at night.
• Never leave the excavator or the brush shredding attachment unattended while it is
in the lifted position or while the shredder is spinning.
• Keep away from rotating elements to prevent entanglement.
• Listen for blades to completely stop prior to dismounting
machine.
• Use flashing warning lights when operating on highways,
except when prohibited by law.
• If using the side shredding method, drive at a speed you
can safely operate the vehicle and attachment. Normal
ground speed ranges from 0-5 miles per hour. Use slow
speeds when operating on or near slopes, ditches, dropoffs, or when debris and foreign objects are to be avoided.
• Use the following guidelines to reduce the risk of equipment
and grass fires:
- Do not smoke or have an open flame near the machinery.
- Do not drive into burning areas or areas that have been freshly burned.
- Do not mow areas that are tinder dry and can burn easily.
- DO NOT allow debris to collect near hydraulic motors and gearboxes.
• Do not position the attachment or turn it so sharp that the hoses could get pinched
or squeezed.
ATTACHING TO THE EXCAVATOR 4
ATTACHING TO THE EXCAVATOR
• Be sure to inspect all safety devices (including safety shields, guards, deflectors,
etc.) before each use.
Safety Device
Examples
Shaft protection cap
Motor & gearbox
cover
Debris chain
curtain guarding
1
2
3
• Maintain all safety decals and make sure they are visible to the operator and by-
standers. If decals are worn, contact your nearest Kubota dealer for replacements.
• Replace bent or broken blades with new ones. Do not attempt to weld or bend
damaged blades. This can cause cracking or other types of damage that could result in the blade being thrown from the brush mower.
• Wear gloves and eye protection and exercise care when handling blades. Also be
alert to worn or damaged surfaces that could have sharp edges.
• Disengage hydraulics and shut off engine, bleed off hydraulic pressure to both high
and low flow circuits allowing all movement to stop before leaving the operator’s position to adjust, lubricate, clean, unclog, remove or install the attachment. See Kubota KX080-3 Operators Manual for detailed instructions on bleeding off hydraulic
pressures.
• Before working on or underneath the attachment, place blocks on both sides (front
and back) of operating vehicle tires or treads and under each end of the attachment
to prevent accidental lowering of the machine. Also remove the ignition key from
the operating vehicle and allow all movement to stop before beginning work.
ATTACHING TO THE EXCAVATOR 5
ATTACHING TO THE KX080
ATTENTION
The K4080 brush mower is designed specifically for the Kubota KX080 excavator
and should not be used on any other machine. Make sure the person who is attaching this brush mower has knowledge of attaching regular buckets and can do so in
a safe manner. The method used most often for attaching this brush mower is the
“curl-in” method.
Note: Remember to allow at least 3-5 minutes for the excavator to warm-up before
using with any oil-operated functions or attachments.
• Move the KX080 into position behind the brush
1
Lo wFlow (SP2 )
outside line
HighFlow (SP1)
inside line
3
pressure
View from
operators seat.
4
Zero Pressure Return Valve To Breaker
Mode “clockwise”.
2
return
mower. Keep in mind that the “back” of the
mower is the end with the hydraulic motor.
• Once the power unit is in position, lower the ex-
cavator arm into position, inserting the rear portion of the mount into the Quick-Attach (1) first
and then “curling” the front portion down into
place. Insert factory pin (2) to keep brush mower
locked in place. Refer to photo on left.
• Extend the main excavator dipper to its full length
in front of the excavator and set mower down with
the skid shoes firmly on level ground. This will
allow for easy access to the (3) flat-face couplers.
Never stand on attachment to reach couplers.
Turn off the excavator and bleed down pressure
on both high and low flow hydraulic circuits. See
Kubota KX080 Operators Manual.
• Couple the hoses. The female end on the
shredder is pressure in (left side) and the male
end is return (right side). These hoses should be
coupled to the high-flow circuit (26.4 GPM) operated by the right-hand joystick in the excavator.
Then enable hydraulic breaker mode on the excavator, allowing for zero pressure return, (4) by
turning the valve located near the hydraulic reservoir to the return to tank position. This step is
vital and if not followed will result in damage
to the hydraulic motor. Also, the high flow
circuit is most often the closest to the cab of
the excavator as shown in the second photo.
• If equipped with a thumb, plumb to the low-
flow circuit (17 GPM), which is operated by
the left-hand joystick on the excavator.
ADJUSTMENT & MAINTENANCE 6
ADJUSTMENT & MAINTENANCE
CLEANING YOUR BRUSH MOWER
To preserve life of paint and decals, wash the brush mower after each use. The
preservation of your brush mower’s decals is essential to safety, so make sure they
are kept in good condition. It is also recommended that some sort of degreasing
solution be used on all bearings.
• Check for excessive grease in bearing areas. Clean off any excessive amount.
• Clean clippings from hydraulic hose areas, mounting areas or any areas that may be
susceptible to excessive heat.
• Clean inside the brush mower with a pressure washer. Make sure the inside of the
mower is kept free from mud and compact grass. Keep in mind that mud built up on
the cutter drum can cause imbalance resulting in vibration.
• Preserve damaged decals or replace them if they are unreadable. Decal kits can be
obtained from your local Kubota dealer.
• Inspect blades for small cracks across the hole and insure they are wearing evenly.
• Inspect attachment hardware such as bolts and roll pins to make sure they are tight.
Kubota strongly recommends
dealers order one starter pack of knives to
be shipped with every K4080 brush mower.
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