Koyker KB660 User manual

OWNERS MANUAL
MANUAL NO. 760168
KB660
BACKHOE
IMPORTANT-KOYKER DEALER
BE SURE THIS MANUAL IS GIVEN TO THE
PURCHASER FOR FUTURE REFERENCE
KOYKER MANUFACTURING CO., P.O. BOX 409
LENNOX, SD 57039
Phone [phone] E-mail [email protected]
10/13/08

CONTENTS
CONTENTS PAGE
Introduction................................................................................................................................................1
SAFETY INFORMATION
Safety Alert Symbol...................................................................................................................................2
Safety Information ...................................................................................................................................3-5
Safety Decals .............................................................................................................................................6
OPERATING INSTRUCTIONS
Operation.................................................................................................................................................7-14
SERVICE AND MAINTENANCE
Backhoe Inspection, Service, and Maintenance ....................................................................................15-17
Hydraulic Hose Parts Diagram ................................................................................................................18
Hydraulic Hose Part Schedule..................................................................................................................19
Valve Parts Diagram.................................................................................................................................20
Valve Part Identification Schedule ...........................................................................................................21
In Line Filter Parts Diagram .....................................................................................................................22
Backhoe Main Frame Parts Diagram........................................................................................................23
Backhoe Main Frame Parts Schedule.......................................................................................................24
Backhoe Arm Frame Parts Diagram.........................................................................................................25
Backhoe Arm Frame Parts Schedule ........................................................................................................26
Bucket Parts Diagram and Schedule.........................................................................................................27
Bucket Replacement Teeth Diagram and Schedule..................................................................................28
3-Point Mount Diagram and Schedule......................................................................................................29
Drawbar Stabilizer Diagram and Schedule...............................................................................................30
PTO Hydraulic Diagram...........................................................................................................................31
PTO Hydraulic Schedule ..........................................................................................................................32
Torsion Bar Diagram and Schedule..........................................................................................................33
Hydraulic Information ..............................................................................................................................34
2” Cylinder Service Kit Schedule.............................................................................................................35
2 1/2” Cylinder Service Kit Schedule.......................................................................................................36
Hydraulic Cylinder Part Diagram.............................................................................................................37
Piston and Gland Service Diagram...........................................................................................................38
LIMITED WARRANTY INFORMATION
Limited Warranty...................................................................................................................................39-41
TORQUE SPECIFICATIONS
Torque Specifications ...............................................................................................................................42

INTRODUCTION
During a considerable period of time, Koyker Manufacturing Company of Lennox, South Dakota, made a
study of the backhoe industry and concluded that the person needs a backhoe that provides quality,
dependability, few parts, ruggedness, good delivery, and ease of maintenance, all at a fair price. The
KB660 backhoe has achieved these goals. With proper care and handling, it will give many years of good
service in normal operations.
Please be sure to follow the manual for proper care instructions.
TO THE PURCHASER
You have purchased an excellent product. With proper care and use, it will give you years of good safe
service. Use only KOYKER or KOYKER approved parts in the general maintenance and repair of your
equipment. Please fill out ownership registration card as soon as possible.
Should you have any questions, comments, improvements, or suggestions regarding the contents of the
manual provided, please contact Koyker Manufacturing Company (800-456-1107 or E-mail
[e-mail]).
We care about your safety!
Remember ALL safety decals are no charge from the factory. Please replace all safety decals if
damaged or missing. Your safety is important to us.
Page 1

SAFETYALERT SYMBOL
The symbol shown below is used to call your attention to instructions concerning your personal safety.
Watch for this symbol it points out important safety precautions. It means ATTENTION! Become Alert!
Your Personal Safety Is Involved!
Read the message that follows and be alert to the possibility of personal injury or death.
DANGER: Indicates an imminently hazardous situation that, if not avoided, will result in death or serious
injury.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous situation that, if not avoided may result in minor or
moderate injury.
WARNING!
Anyone who will operate or work around a backhoe should first read this manual.
Page 2

SAFETY
Improper use of a backhoe can cause serious injury or death. The following safety precautions, and those
given on the tractor mount installation instructions, should be thoroughly understood before attempting to
operate this machine.
BEFORE OPERATING:
Carefully study and understand this manual, the specific tractor mount instructions, and the
attachment(s) manual's).
Prior to operation, inspect the backhoe for system leaks and damaged, missing, or malfunctioning
components in an effort to avoid the possibility of a dangerous failure involving structural members
or hydraulic system components.
Be certain any repairs necessary are completed prior to backhoe operation. Set the parking brake,
place the gear shift in neutral, turn off the tractor and remove the key.
Never operate or transport unit with covers or shields removed.
Never leave the tractor running unattended.
Completely familiarize yourself and others involved with the operation of the hydraulic control
valve before operating the backhoe.
Be certain all bystanders are clear of the machine and operation area prior to operation.
It may be necessary to add wheel ballast or front weights as recommended by the tractor
manufacturer to maintain stability of the machine to prevent tipping or upset which could result in
serious injury or death.
It is recommended that both front and rear wheel treads be set to the widest recommended width to
prevent tipping or upset which could result in serious injury or death.
Do not take passengers on the tractor or backhoe. There is no safe place for a passenger.
Use the handholds and step plates when getting on/off the tractor. Failure to do so could cause a
fall.
This backhoe is designed for light excavating, light commercial, or light grading and digging. It’s
design is NOT intended for industrial use.
DURING OPERATION:
Never operate the backhoe by standing up on, or beside the machine. Operate only from the
backhoe seat.
Page 3

SAFETY
Check your work area. Avoid hitting overhead electrical wires, underneath cables, pipes, gas lines
and etc.
Be sure operating area is clear of others during machine operations.
Never lift, hoist, or carry humans in the bucket or on any portion of the backhoe or backhoe
attachments. Failure to heed, may result in serious injury or death.
Do not adjust relief valve setting. This valve is factory set and should be adjusted only by a
qualified service person. Incorrect valve setting could result in equipment damage and/or personal
injury.
Block off work area from all bystanders, livestock, etc. Allow plenty of room for backhoe reach
and swing.
Operate only from the backhoe seat.
Use your backhoe only for digging. Do not use it to pull things, as a battering ram, or attach ropes,
chains, etc., to the unit.
Lower stabilizers and bucket when removing backhoe. This will increase the stability of the unit.
Do not dig close to stabilizers, the ground could collapse from under the backhoe.
Do not lift loads in excess of the backhoe capacity.
Always lower the backhoe bucket and stabilizers to ground, shut off engine, remove key and apply
the parking brake before leaving the unit unattended.
TRANSPORTING:
Be sure to engage the boom lock before transporting backhoe. Failure to do so could cause an
unstable traveling condition.
Allow for height of backhoe when transporting backhoe so as not to catch unit on low overhangs or
wires.
Use safety lights and SMV emblem in addition to whatever local codes require when equipment is
being transported on the road or highway. Check with proper authorities for legal limitations.
Do not drive close to ditches, excavations, etc. cave in could result. Drive slow over rough terrain.
Page 4

SAFETY
PERFORMING MAINTENANCE:
Carefully review, understand, and follow the “maintenance” section in this owners manual before
attempting to service backhoe. Observe proper maintenance schedules and repairs to keep unit in
safe working order. See on page 15.
Lower the bucket or attachment to the ground, shut off tractor engine, and relieve pressure in the
hydraulic system before adjusting, lubricating, or servicing the backhoe.
Escaping hydraulic oil under pressure can penetrate the skin. Never use any part of your body to
check for hydraulic leaks. Use cardboard when checking for leaks. See Fig. 5-1. Relieve hydrau-
lic pressure before disconnecting any hydraulic line. Failure to heed may result in serious injury or
death.
Before disconnecting hydraulic lines, lower the backhoe and attachments. Lock out the hydraulic
supply and relieve all hydraulic pressure.
Replace any damaged or painted-over decals. See Page 6 for replacement decals.
REMEMBER:
1. Move Slowly!
2. Always use care and common sense!
3. Be careful for your own sake and for that of others!
4. Koyker Mfg. Co. includes all reasonable means for accident prevention except a safe and
careful operator.
FIG. 5-1
Page 5

SAFETY DECALS
Page 6

WARNING:
Never allow anyone to operate the backhoe until they have carefully reviewed and
understood this owners manual.
GENERAL INFORMATION:
Throughout this manual, reference is made to various backhoe components. The purpose of this page is to
acquaint you with the various names of these components. This knowledge will be helpful when reading
through this manual or when ordering service parts.
OPERATION
Page 7

GENERAL INFORMATION
Your backhoe is operated by four different control levers. Two are for stabilizers operation and the other
two operate the swing, boom, dipper, and bucket functions. The information contained below will help
you become familiar with the operation of each control lever. Read the safety precations of this manual
before attempting to use the backhoe. Remember, right and left when referred to on this page are
determined by the operator’s position seated at the backhoe controls facing the bucket.
BOOM/SWING LEFT RIGHT DIPPER/BUCKET
CONTROL LEVER STABILIZER CONTROL LEVER
BACKHOE STABILIZER LEVERS
Moving the stabilizer lever (s) forward will bring the backhoe stabilizer (s) “Down”. Moving the stabilizer
lever (s) rearward will bring the backhoe stabilizer (s) “Up”. Both stabilizers are required to be down for
proper stability of the backhoe when in operation.
BOOM/SWING LEVER (LEFT HAND LEVER)
Pushing the boom/swing lever forward will “Lower” the boom dipstick and bucket. Pulling the lever
rearward will “Lift” the boom dipstick and bucket.
Pushing the boom/swing lever to the left will swing the boom and bucket to the “Left”. Pushing the lever
to the right will swing the boom and bucket to the “Right”.
DIPPER/BUCKET LEVER (RIGHT HAND LEVER)
Pushing the dipper/bucket lever forward will move the dipper “Out” or away from the operator. Pulling
the dipper/bucket lever rearward will move (crowd) the dipper “In” or toward the operator.
Pushing the dipper/bucket lever to the left will “Fill” or curl the bucket (move inward). Pushing the lever
to the right will “Dump” the bucket (move outward).
OPERATION
Page 8