LeeBoy 685B Service manual
685B MOTOR GRADER
09/05/2008
OPERATIONS, SERVICE
AND PARTS MANUAL
685B MOTOR GRADER MANUAL
Manual No. 985685
For Units With Seriel #400 and higher
685B MOTOR GRADER
500 Lincoln County Parkway Ext.
Lincolnton, North Carolina 28092
www.LeeBoy.com
LIMITED WARRANTY
POLICY AND PROCEDURES
WARRANTY
1. If a defect in material or workmanship is
found and the authorized dealer is notified
during the warranty period, LeeBoy will
repair or replace any part or component of
the unit or part that fails to conform to the
warranty during the warranty period.
2. The warranty date will begin upon the
completion of the warranty form by the initial
customer and will expire after twelve (12)
months have passed. The Warranty Card
should be filled out within (10) days of
delivery of the unit.
3. Engines are warranted by their
manufacturers and may have warranty
coverage that differs from that of LeeBoy.
4. Replacement parts furnished by LeeBoy are
covered for the remainder of the warranty
period applicable to the unit or component in
which such parts are installed.
5. LeeBoy has the right to repair any
component or part before replacing it with a
new part.
6. All new replacement parts purchased by a
LeeBoy dealer will carry a six (6) month
warranty. Remanufactured parts purchased
by a LeeBoy dealer will carry a ninety (90)
day warranty.
ITEMS NOT COVERED
LeeBoy is not responsible for the following:
1. Charges for travel time, mileage, or
overtime.
2. Charges related to transporting the product
to and from the place at which warranty
work is performed.
3. Airfreight charges related to transporting
repair parts to the place at which warranty
work is performed.
4. All used units or used parts of any kind.
5. Repairs due to normal wear and tear, or
brought about by abuse or lack of
maintenance of the equipment, except for
premature failures, conveyor chains,
polytrack pads, and track rails.
6. Attachments not manufactured or installed
by LeeBoy.
7. Liability for incidental or consequential
damages of any type including, but not
limited to lost profits or expenses of acquiring
replacement equipment.
8. Miscellaneous charges.
LIMITATIONS
LeeBoy has no obligation under this warranty for:
1. Any defects caused by misuse,
misapplication, negligence, accident or
failure to maintain or use in accordance with
the most current operating instructions.
2. Unauthorized alterations.
3. Defects or failures caused by any
replacement parts or attachments not
manufactured by or approved by LeeBoy.
4. Failure to conduct normal maintenance and
operating service, including without limitation,
providing lubricants, coolant, fuel, tune-ups,
inspections or adjustments.
5. Unreasonable delay, as established by
LeeBoy, in making the applicable units or
parts available upon notification of a service
notice ordered by LeeBoy.
6. The warranty responsibility on all engines
rests with the respective manufacturer.
7. LeeBoy may have support agreements with
some engine manufacturers for warranty and
parts support.
OTHER WARRANTIES
THE FOREGOING WARRANTY IS EXCLUSIVE AND
IN LIEU OF ALL OTHER EXPRESSED STATUTORY
AND IMPLIED WARRANTIES APPLICABLE TO
UNITS ENGINES, OR PARTS WITHOUT
LIMITATION, ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR USE OR PURPOSE. IN NO EVENT,
WHETHER AS A RESULT OF BREACH OF
CONTRACT OR WARRANTY, OR ALLEGED
NEGLIGENCE OR LIABILITY WITHOUT FAULT,
SHALL LEEBOY BE LIABLE FOR SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES,
INCLUDING WITHOUT LIMITATION, LOSS OF
PROFIT OR REVENUE, COST OF CAPITAL, COST
OF SUBSTITUTED EQUIPMENT, FACILITIES OR
SERVICES DOWNTIME COSTS, LABOR COSTS OR
CLAIMS OF CUSTOMERS, PURCHASERS OR
LESSEES FOR SUCH DAMAGES.
685B MOTOR GRADER
685B MOTOR GRADER
DELIVERY DATE______________________________________
UNIT SERIAL NUMBER_________________________________
ENGINE TYPE________________________________________
ENGINE NUMBER_____________________________________
DEALER'S NAME AND ADDRESS
_____________________________________________________
_____________________________________________________
PHONE NUMBER_______________________________________
EQUIPMENT HOURS____________________________________
SERVICE MANAGER ____________________________________
500 Lincoln County Parkway Ext. Lincolnton, North Carolina 28092 www.LeeBoy.com
USER'S REFERENCE GUIDE
685B MOTOR GRADER
FM-1
685B MOTOR GRADER
This manual should be used with all
related supplemental books, engine and
transmission manuals, and parts books.
Related Service Bulletins should be
reviewed to provide information regarding
some of the recent changes.
If any questions arise concerning this
publication or others, contact your local
LeeBoy Distributor for the latest available
information.
Contents of this manual are based on
information in effect at the time of
publication and are subject to change
without notice.
MODEL 685 MOTOR GRADER
OPERATORS, MAINTENANCE AND PARTS MANUAL
REAR VIEW
SIDE VIEW
685B MOTOR GRADER
FM-2
685B MOTOR GRADER
DANGER
YOU MUST FOLLOW ALL DANGER SAFETY
NOTES. IF YOU DO NOT FOLLOW THE
INSTRUCTIONS, YOUR MISTAKE MIGHT LIKELY
RESULT IN VERY SERIOUS INJURY OR DEATH.
WARNING
WARNING safety notes must ALSO be followed.
Your mistake might result in SERIOUS INJURY to
yourself or others.
CAUTION
CAUTION safety notes are ALSO very important.
They point out to you where your mistakes could
cause PHYSICAL HARM to you or others, or
damage to the machine.
This manual provides important
information to familiarize you with safe
operating and maintenance procedures.
Even though you may be familiar with
similar equipment, you MUST read and
understand this manual before operating
this unit.
Safety is everyone's business and is one
of your primary concerns. Knowing the
guidelines covered in the following
paragraphs and in Section 1 will help
provide for your safety, for the safety of
those around you, and for the motor
grader's proper operation.
LOOK FOR THESE SYMBOLS WHICH
POINT OUT ITEMS OF EXTREME
IMPORTANCE TO YOU AND YOUR
COWORKERS SAFETY. READ AND
UNDERSTAND THOROUGHLY. HEED
THE WARNINGS AND FOLLOW THE
INSTRUCTIONS.
IIMMPPOORRTTAANNTT
SAFETY INSTRUCTIONS
685B MOTOR GRADER
FM-3
685B MOTOR GRADER
SAFETY PRECAUTIONS
If your motor grader has been repainted, it
is extremely important that all the decals
referring to CAUTION, WARNING, and
DANGER be replaced in their proper
locations. The illustrations on this page will
aid you in determining the proper
locations; however, for additional help, you
should refer to the parts listing in the parts
section of this manual and note the
description column. Under this column, a
description of location is provided for each
decal. If you need more explicit
instructions, contact your dealer.
NOTE
It is the responsibility of the owner and
operator to make sure that all decals
are readable and located on motor
grader as designated by the
manufacturer.
685 DECALS and DECAL LOCATIONS
685B MOTOR GRADER
FM-4
685B MOTOR GRADER
PRE-START INSPECTION
INSPECT machine. Have any malfunctioning,
broken or missing parts repaired or replaced before
using the grader.
CHECK hydraulic hoses daily for wear and leaks.
Replace if damaged.
CHECK that all the instruction and safety labels are
in place and readable. These are as important as
any other equipment on the machine.
READ and FOLLOW all instruction decals.
WEAR OSHA required safety equipment when
running the motor grader.
CHECK engine, transmission, and hydraulic oil
levels. Fill to the correct level as necessary.
FILL the fuel tank with the engine off. NEVER fill
fuel tank near an open flame or when smoking.
CHECK for frayed or worn electrical wires and
loose or corroded connections.
CHECK tires for wear, cuts, and damage. CHECK
air pressure. INSPECT wheels for loose, damaged,
or missing hardware.
CHECK the parking brake to make sure it is
operating properly.
CHECK pedals and levers for freedom of
movement. MAKE SURE operator's compartment
is free of debris.
CHECK steps and supports for damage. Repair as
necessary.
CHECK protective devices, cab, ROPS, canopy,
shields and seat belt for wear or damage. MAKE
SURE all protective devices operate correctly.
OPERATING SAFETY
WEAR OSHA required safety equipment when
running the motor grader.
ALWAYS be seated with seat belt on when
operating equipment.
ALWAYS make sure no person or object is in your
line of travel BEFORE starting.
WORK slowly in tight areas.
DO NOT run engine in a closed building for long
periods of time.
AVOID steep hills and sharp turns if possible.
REDUCE speed before turning or swinging loads.
ALWAYS look BEFORE changing your direction of
travel.
DO NOT leave the engine running without operator
present.
NEVER shift the low to high lever on any incline.
ALWAYS lower moldboard, scarifier, bucket, and
front blade when leaving the machine unattended.
DO NOT start engine by shorting across starter
terminals. Machine will start in gear if normal
circuitry is bypassed.
NEVER start engine while standing on the ground.
Start engine only from operator's seat, with traction
foot pedal in neutral.
STOPPING SAFETY
ALWAYS park the grader on solid, level ground. If
this is not possible, always park the grader at a
right angle to the slope.
ALWAYS return traction foot pedal to neutral
position and lock it in neutral with the traction foot
pedal lock lever.
ALWAYS lower moldboard, scarifier, bucket, and
front blade when leaving the machine unattended.
ALWAYS engage parking brake.
USE proper flags, barriers and warning devices,
especially when parking in areas of traffic.
MAINTENANCE SAFETY
NEVER work on the grader with the engine
running.
NEVER fill the fuel tank with the engine running.
DO NOT change the engine governor settings.
ALWAYS replace damaged or lost decals.
DISCONNECT battery cables when working on the
electrical system or when welding on the unit.
MAKE SURE safety stop cable is attached when
pulling the battery tray out to disconnect cables.
IF battery needs a charge, be sure battery charger
is off when making connections.
BE SURE the correct battery polarity is observed
[negative (-) to negative (-) and positive (+) to
positive (+)], when connecting a battery charger or
jumper cable.
DO NOT use hands to find hydraulic leaks. Highpressure fluid can penetrate the skin, causing
severe injury.
DO NOT service or repair the grader blades,
scarifier, or moldboard in a raised position unless
supported by approved jacks and jack stands.
CHECK parking brake to assure it is operating
correctly.
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
DESCRIPTION AND SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
REPLACEMENT PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
NAMEPLATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
RECEIVING THE MOTOR GRADER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Section 1
INTRODUCTION
1-1
685B Motor Grader
GENERAL INFORMATION
This manual contains a description of the motor
grader and its major components, specification
information, a description of the controls, operating
procedures, maintenance, and replacement
procedures, and parts lists for the Model 685 Motor
Grader.
DESCRIPTION AND SPECIFICATIONS
Refer to Section 2 - SPECIFICATIONS in this
manual for all major system descriptions and
specifications and for typical torque value tables.
CONTROLS
Refer to Section 3 - OPERATING CONTROLS,
INDICATORS, AND GAUGES in this manual for a
description of all controls, gauges, and indicators
used to control operation of the motor grader.
OPERATION
Refer to Section 3 - OPERATION in this manual for
information needed to safely operate the motor
grader. The operator of this equipment should
READ, UNDERSTAND, and FOLLOW the
operating instructions, Cautions, and safety
instructions provided in the front of this manual and
in the OPERATION section.
WARNING: Do not attempt to operate the
Model 685 Motor Grader unless
fully trained in machine operation.
Only authorized personnel should
operate the Model 685 Motor
Grader. All instructions provided in
this manual and on the machine
decals must be followed to prevent
damage to the equipment and/or
injury to operating personnel.
MAINTENANCE
Refer to Section 4 - MAINTENANCE in this manual
for all maintenance procedures.
CAUTION: All maintenance instructions
provided in this manual should be
followed to insure safety of the
personnel performing the
maintenance and to prevent
damage to the machine.
REPLACEMENT PROCEDURES
Refer to Section 4 - REPLACEMENT
PROCEDURES in this manual for instructions to
replace damaged parts.
CAUTION: All maintenance instructions
provided in this manual should be
followed to insure safety of the
personnel performing the
maintenance and to prevent
damage to the machine.
NAMEPLATE
The nameplate, Figure 1-1, contains the serial
number and basic data used to identify the specific
model on the motor grader. The nameplate is
mounted on the right side of the cab/canopy
support frame.
RECEIVING THE MOTOR GRADER
CAUTION: Always set parking brake and lock
the traction foot pedal using the
traction foot pedal lock lever
before leaving the machine. Check
parking brake before placing
machine back in service.
The motor grader was inspected thoroughly at the
factory. However, road hazards or vandalism may
occur during transport and result in damage. Inspect
the machine as outlined below and perform necessary
repairs before placing the machine in service.
1. Check engine oil level as shown in the manufacturer's manual.
2. Check fuel tank, cooling system, chain boxes,
engine oil, and hydraulic reservoir for proper
levels and contaminants. If contaminants are
suspected, flush and fill the system.
3. Check chain boxes for proper level (approximately 4 to 5 inches or 7 gallons of 50 weight motor
oil). Make sure chains, sprockets and spline
areas are flushed and cleaned.
4. Read this manual and understand the contents.
5. Check all hydraulic functions and repair or
adjust as necessary. Have any repairs or
adjustments performed by a qualified mechanic
or consult local dealer.
Section 1
INTRODUCTION
1-2
685B Motor Grader
6. Check for missing parts. If parts are missing or
motor grader is damaged, consult the local
dealer.
7. Check the parking brake to make sure it is
operating properly.
8. Check the seat belt to make sure it is operating
properly.
Section 1
INTRODUCTION
1-3
685B Motor Grader
FIGURE 1-1. NAME PLATE
Section 1
INTRODUCTION
1-4
685B Motor Grader
NOTES
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
ELECTRICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Drive System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Moldboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Scarifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Front Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
TABLE 2-1. ENGINE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
TABLE 2-2. ELECTRICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
TABLE 2-3. MACHINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
TABLE 2-4. MOLDBOARD DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
TABLE 2-5. FRONT BLADE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
TABLE 2-6. SCARIFIER DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
TABLE 2-7. STEERING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
TABLE 2-8. HYDRAULIC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
TABLE 2-9. DRIVE SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
TABLE 2-10. MACHINE SYSTEM CAPACITY SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2-9
TABLE 2-11. FUEL AND LUBRICANT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
TABLE 2-12. TORQUE SPECIFICATIONS FOR STANDARD INCH FASTENERS . . . . . . . . . . .2-10
TABLE 2-13. TORQUE SPECIFICATIONS FOR METRIC FASTENERS . . . . . . . . . . . . . . . . . . .2-11
Section 2
SPECIFICATIONS
2-1
685B Motor Grader
GENERAL INFORMATION
The description and specifications given in this section are applicable to the Model 685 Motor Grader.
This section contains a description of how the
major components operate. It also includes the
hydraulic, electrical, performance, and fluid specifications and torque values for both standard and
metric fasteners used on this machine.
ENGINE
The 685 Motor Grader uses a Cummins 4B 3.9
four-cylinder diesel engine to drive the hydraulic
traction pump, function pump and steering pump.
The engine is mounted to the rear of the operating
platform and accessible through doors in the
engine cover.
A fuel lift pump mounted on the engine draws
diesel fuel from the fuel tank. The fuel tank is
mounted behind the operator's platform on the right
side of the grader. The fuel tank has a shutoff valve
installed on the fuel outlet to shut off the fuel during
service. See Figure 2-1.
An air cleaner mounted on the right side of the
engine filters intake air before use by the
engine. The air cleaner removes fine particles
such as dust, sand, chaff and lint from the air.
See Figure 2-2.
A pre-cleaner mounted on top of the air cleaner
assembly removes larger particles of dirt and
debris before the air enters the air filter elements.
The pre-cleaner relieves the load on the air filter
elements and allows longer intervals between servicing. The materials trapped by the pre-cleaner are
deposited in the pre-cleaner bowl.
As air is taken into the air cleaner assembly, a
cyclone type action deposits some of the fine particles in the evacuator mounted on the bottom of the
air cleaner housing. The evacuator is held closed
during engine operation by suction. When the
engine is shut off the weight of the debris helps to
open the rubber flaps allowing the debris to fall out.
Section 2
SPECIFICATIONS
2-2
685B Motor Grader
FIGURE 2-1. FUEL SUPPLY
FIGURE 2-2. AIR CLEANER ASSEMBLY
The rubber flaps can also be squeezed together for
cleaning.
Primary and secondary fuel filters remove contaminants from the diesel fuel before the fuel flows to
the injection pump for injection into the engine
combustion chamber. See Figures 2-3 and 2-4 for
location of engine fuel and oil filters.
A radiator mounted at the rear of the grader cools
the engine. As coolant flows through the radiator,
airflow from the engine-driven fan removes heat
from the coolant.
Refer to the engine owner's Operation and
Maintenance Manual for a complete description of
the engine.
Section 2
SPECIFICATIONS
2-3
685B Motor Grader
FIGURE 2-4. ENGINE OIL FILTER
FIGURE 2-3. FUEL FILTERS
ELECTRICAL SYSTEM
The electrical system is powered by two 12-volt
batteries mounted in the battery compartment
located at the rear of the machine. See Figure 2-5.
FIGURE 2-5. BATTERY BOX
The batteries are connected in parallel, producing
12 volts DC and maintaining 950 cold cranking
amperes (CCA). An engine-mounted alternator
capable of 105 amperes charging capacity keeps
the batteries charged during normal operation.
The battery charge rate can be monitored using a
voltmeter mounted in the instrument panel. See
Figure 2-6.
FIGURE 2-6. INSTRUMENT PANEL
HYDRAULIC SYSTEM
The hydraulic system includes three hydraulic
pumps driven by the engine (see Figure 2-7). A
traction pump driven directly by the engine is
mounted with an adapter plate at the rear engine
output shaft. This pump is described in detail in the
section entitled Drive System.
The function pump is mounted on the rear of the
traction pump and driven by the traction pump output shaft. This gear type pump provides hydraulic
pressure and flow to operate all the hydraulic cylinders used to control the grader functions.
The pump draws hydraulic oil from the reservoir
using a common inlet with the steering pump. The
pressurized oil flows to the hydraulic control valve
mounted in the operator's platform.
The steering pump is mounted on the rear of the
function pump and driven by the traction pump output shaft. This gear type pump provides hydraulic
pressure and flow to operate the steering cylinder.
The pump draws hydraulic oil from the reservoir
using a common inlet with the function pump. The
pressurized oil flows to the steering motor mounted
in the steering console located in the operator's
compartment.
Drive System
The model 685 Motor Grader drive system
includes a hydrostatic traction pump, variable
speed hydraulic motor, two speed transfer cases,
rear axle carrier assembly, and chain drive
assembly.
The hydrostatic traction pump is a variable piston
type pump. A swash plate controls the direction
and flow of hydraulic drive pressure. A traction foot
pedal and linkage in the operator's compartment
and pump controller mounted on the pump are
used to control the direction of travel and output
pressure by tilting the swash plate.
The variable drive motor also uses a swash plate
to control machine speed. A lever located in the
operator's compartment is used to control swash
plate tilt and piston stroke. A longer piston stroke
increases hydraulic oil pressure, oil flow, and drive
motor output speed.
A two-speed transfer case mounted between the
drive motor and rear axle carrier provides high
and low gear selection. A gear selector lever in
the operator's compartment allows the operator to
shift gears.
NOTE: When shifting the two-speed lever from
low to high (or high to low) make sure
the brake is engaged and the
moldboard is on the ground.
Section 2
SPECIFICATIONS
2-4
685B Motor Grader
DANGER: Shift lever must be in low or high
at all times. Machine must be on
level ground and at full stop when
shifting.
The rear axle carrier assembly is used to convert
input rotation to axle shaft output rotation. The
left and right axle shafts drive the chain drive
assembly.
The chain drive assembly uses axle shaft rotation
to drive the chain and sprocket assemblies. The
sprockets are mounted on splined axle shafts used
for mounting two wheels on each side.
Brakes
Machine braking is controlled by the flow of
hydraulic oil in the drive system. When the traction
foot pedal is returned to the neutral from the forward or reverse position, the flow of hydraulic oil to
the drive motor stops rotating the rear axle carrier
assembly allowing the machine to slow and stop.
A disc brake drive assembly mounted on the rear
of the rear axle housing prevents the rear axle
shafts and chain drive assembly from moving. The
disc brake drive assembly includes a brake disc
and caliper. Brake pads mounted in the caliper prevent rotation of the final drive until the parking
brake selector valve is released.
The engine must be running to release the parking
brake. The fail-safe brake is actuated by spring
pressure and requires constant hydraulic pressure
for release. If the engine is not running or a
hydraulic failure occurs the parking brake can be
manually released as described in the section enti-
tled Motor Grader Towing.
Steering
The 685 Motor Grader can be steered using the
steering wheel and motor, the wheel lean control
lever, or the articulate lever.
The steering wheel controls the steering motor,
which controls the flow of hydraulic oil to the steering cylinder. The steering cylinder is mounted
between the front axle support and the right hand
spindle. The left and right spindles are connected
by a tie rod, which forces the left wheel to turn
when the right wheel is actuated.
The wheel lean lever controls the flow of hydraulic
oil to the wheel lean cylinder. The wheel lean cylinder is mounted between the front axle support and
the right hand spindle support. The left and right
spindle supports are connected by a tie rod, which
forces the left wheel to lean when the right wheel is
actuated.
CAUTION: The moldboard assembly will
contact the drive wheels during
articulation. Make sure the turning
radius and moldboard position do
not result in drive wheel damage
caused by improper steering.
The articulate lever controls the flow of hydraulic oil
Section 2
SPECIFICATIONS
2-5
685B Motor Grader
FIGURE 2-7. HYDRAULIC PUMPS
to the articulate cylinders. The articulate cylinders
are mounted between the mainframe assembly
and the boom assembly. The boom assembly is
mounted on the main frame using an articulator
shaft and bearing assembly. The assembly allows
the machine to pivot right and left when the articulate cylinders are actuated.
The steering can be controlled using one or all of
the steering systems.
An optional dead engine steering system is available, which allows steering if the engine will not run
or certain hydraulic failures occur. The system
includes an electric motor and auxiliary hydraulic
pump combination. When activated, the auxiliary
hydraulic pump provides hydraulic pressure for
steering.
Moldboard
The moldboard assembly is mounted underneath
the boom assembly and supported by a drawbar
and turntable assembly. The moldboard is the
primary tool used to move grading materials.
The moldboard position is controlled by hydraulic
cylinders, which allow the moldboard to be tilted
from front to rear, tilted from side to side, raised for
transport, rotated, and lowered for penetration. The
moldboard assembly can also be side-shifted up to
three feet.
Scarifier
The scarifier assembly is mounted underneath the
mainframe assembly. Five replaceable teeth and
tooth supports are used to penetrate the grading
surface. The tooth supports are adjustable and
secured with pin locks inserted between the
support frame slot and tooth support.
The scarifier is raised and lowered using a
hydraulic lift cylinder.
Front Blade
The front blade assembly is mounted on the front
of the boom assembly. The front blade is bolted to
the front blade support assembly. The front blade is
used in conjunction with the moldboard and scarifier for leveling and backfilling.
The front blade assembly is raised and lowered
using a hydraulic lift cylinder.
OPTIONS
The Model 685 Motor Grader can be equipped with
the following options:
1. Full fabricated cab with heater, air conditioner
and light package.
2. Front loader bucket and front blade assembly.
3. Front traction assist, allowing the operator to
actuate hydraulic front drive hubs for additional
traction during work.
4. Dead engine steering, allowing machine
steering during steering pressure failure.
SPECIFICATIONS
Tables 2-1 through 2-11 list the engine and system
specifications for the Model 685 Motor Grader.
Section 2
SPECIFICATIONS
2-6 685B Motor Grader
TABLE 2-1. ENGINE SPECIFICATIONS
ITEM SPECIFICATION
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cummins 4B3.9
Cummins 4BT3.9 (Turbo)
H.P. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110 HP @ 2500
Displacement . . . . . . . . . . . . . . . . . . . . . .238 cubic inches (3.9 L)
NOTE: See the manufacturers Operation Manual for additional information and specifications.
TABLE 2-2. ELECTRICAL SPECIFICATIONS
ITEM SPECIFICATION
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 12VDC Maintenance Free
Cold Cranking Amps (CCA) . . . . . . . . . . .950 CCA
System Voltage . . . . . . . . . . . . . . . . . . . . .12 VDC
Charging System . . . . . . . . . . . . . . . . . . .Alternator 12 VDC, 105 Amps
TABLE 2-3. MACHINE DIMENSIONS (see Figure 2-8)
ITEM SPECIFICATION
Overall Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . .15,200 pounds
(6895 kg)
Overall Length . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 feet 8 inches
(6.6 m)
Overall Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 feet
(2.1 m)
Overall Height . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 feet 6 inches (2.6 m) with Canopy
9 feet (2.7 m) with Cab
FIGURE 2-8. OUTLINE DIMENSIONAL DRAWING
TABLE 2-4. MOLDBOARD DIMENSIONS
ITEM SPECIFICATION
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 feet (3 m)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 inches (457 mm)
Side Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 feet (914 mm)
Tilt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 degrees
Raised Clearance . . . . . . . . . . . . . . . . . . . . . . . . . .13.5 inches (343 mm)
Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 inches (305 mm)
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 degrees
Section 2
SPECIFICATIONS
2-7
685B Motor Grader
TABLE 2-5. FRONT BLADE DIMENSIONS
ITEM SPECIFICATION
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 feet (2.1 m)
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 inches (457 mm)
Raised Clearance . . . . . . . . . . . . . . . . . . .13 inches (330 mm)
Penetration . . . . . . . . . . . . . . . . . . . . . . . .3 inches (76 mm)
TABLE 2-6. SCARIFIER DIMENSIONS
ITEM SPECIFICATION
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 inches (965 mm)
Number Teeth . . . . . . . . . . . . . . . . . . . . . .5 on-center
Raised Clearance . . . . . . . . . . . . . . . . . . .12 inches (305 mm)
Penetration . . . . . . . . . . . . . . . . . . . . . . . .9 inches (229 mm)
TABLE 2-7. STEERING SPECIFICATIONS
ITEM SPECIFICATION
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . .Hydraulic
Articulation . . . . . . . . . . . . . . . . . . . . . . . .10 feet 6 inch (3.2 m) radius
Wheel Lean . . . . . . . . . . . . . . . . . . . . . . . .26 degrees
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(2) 15/38.5-15 lt
NOTE: Refer to the tire manufacturers brochures for additional information on tire size
and requirements.
TABLE 2-8. HYDRAULIC SPECIFICATIONS
ITEM SPECIFICATION
Traction Pump Variable piston type 4.26 cu. in./rev.
(69.8 cu. cm)
Function Pump Gear type 0.8 cu. in./rev. (13.1 cu. cm)
Steering Pump Gear type 0.8 cu. in./rev. (13.1 cu. cm)
Drive Motor Variable volume 5.43 cu. in. (89 cu. cm)
Operating Pressure 0 - 4500 psi (0 - 310 bar)
Hydraulic Filters Suction filter in-line, spin-on type
Mesh screen return
Oil Cooler Radiator/oil cooler, engine fan cooling
Section 2
SPECIFICATIONS
2-8
685B Motor Grader
TABLE 2-9. DRIVE SYSTEM SPECIFICATIONS
ITEM SPECIFICATION
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hydraulic
Transfer case . . . . . . . . . . . . . . . . . . . . . .2 speed, 0 - 20 mph (32 kph)
Differential . . . . . . . . . . . . . . . . . . . . . . . . .Single carrier
Final Drive . . . . . . . . . . . . . . . . . . . . . . . .Chain drive 4 axle output
[42 in. (1.06 m) on-center]
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15/38.5-15 lt
NOTE: Refer to the tire manufacturers brochures for additional information on tire size
and requirements.
TABLE 2-10. MACHINE SYSTEM CAPACITY SPECIFICATIONS
ITEM SPECIFICATION
SYSTEM CAPACITIES
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 U.S. gallons (151 L)
Engine Lubrication Oil . . . . . . . . . . . . . . . .11.6 quarts (11 L)
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5 U.S. gallons (21 L)
Hydraulic Oil Reservoir . . . . . . . . . . . . . . .32 U.S. gallons (121 L)
TABLE 2-11. FUEL AND LUBRICANT SPECIFICATIONS
ITEM SPECIFICATION
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . .15W-40
Hydraulic Oil . . . . . . . . . . . . . . . . . . . . . . .5W20 AWAT OIL
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . .Ethylene/glycol or propylene glycol
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diesel, local low-sulphur blend
Transfer Case (2 Speed) . . . . . . . . . . . . . .50 WT Motor Oil
Differential Oil . . . . . . . . . . . . . . . . . . . . . .50 WT Motor Oil
Chain Box . . . . . . . . . . . . . . . . . . . . . . . . .50 WT Motor Oil
Grease . . . . . . . . . . . . . . . . . . . . . . . . . . .Shell Avania EP Grease or Equivalent
Section 2
SPECIFICATIONS
2-9
685B Motor Grader
TABLE 2-12. TORQUE SPECIFICATIONS FOR STANDARD INCH FASTENERS
WARNING: The following Table lists torque values for standard hardware and are intended as a
guide for average application involving typical stresses and machined surfaces. Values
are based on physical limitations of clean, plated and lubricated hardware. In all cases,
when an individual torque value is specified, it should be followed instead of values
given in this table.
CAUTION: Replace original equipment with hardware of equal grade.
CAPSCREWS: SAE GRADE 5 CAPSCREWS: SAE GRADE 8
SIZE THREAD TORQUE FT. LBS. TORQUE N•m TORQUE FT. LBS. TORQUE N•m
Dry Lubed Dry Lubed Dry Lubed Dry Lubed
1/4 20 UNC 8 6 11 9 12 9 16 12
28 UNF 10 7 13 10 14 10 19 14
5/16 18 UNC 17 13 24 18 25 18 33 25
24 UNF 19 14 26 20 27 20 37 28
3/8 16 UNC 31 23 42 31 44 33 59 44
24 UNF 35 26 47 36 49 37 67 50
7/16 14 UNC 49 37 67 50 70 52 95 71
20 UNF 55 41 75 56 78 58 105 79
1/2 13 UNC 75 57 100 77 105 80 145 110
20 UNF 85 64 115 86 120 90 165 120
9/16 12 UNC 110 82 145 110 155 115 210 155
18 UNF 120 91 165 125 170 130 230 175
5/8 11 UNC 150 115 205 155 210 160 285 215
18 UNF 170 130 230 175 240 180 325 245
3/4 10 UNC 265 200 360 270 375 280 510 380
16 UNF 295 225 405 300 420 315 570 425
7/8 9 UNC 430 320 580 435 605 455 820 615
14 UNF 475 355 640 480 670 500 905 680
1 8 UNC 645 485 875 655 910 680 1230 925
14 NF 720 540 980 735 1020 765 1380 1040
1-1/8 7 UNC 795 595 1080 805 1290 965 1750 1310
12 UNF 890 670 1210 905 1440 1080 1960 1470
1-1/4 7 UNC 1120 840 1520 1140 1820 1360 2460 1850
12 UNF 1240 930 1680 1260 2010 1500 2730 2050
1-3/8 6 UNC 1470 1100 1990 1490 2380 1780 3230 2420
12 UNF 1670 1250 2270 1700 2710 2040 3680 2760
1-1/2 6 UNC 1950 1460 2640 1980 3160 2370 4290 3210
12 UNF 2190 1650 2970 2230 3560 2670 4820 3620
Section 2
SPECIFICATIONS
2-10
685B Motor Grader
TABLE 2-13. TORQUE SPECIFICATIONS FOR METRIC FASTENERS
WARNING: The following Table lists torque values for standard hardware and are intended as a
guide for average application involving typical stresses and machined surfaces. Values
are based on physical limitations of clean, plated and lubricated hardware. In all cases,
when an individual torque value is specified, it should be followed instead of values
given in this table.
CAUTION: Replace original equipment with hardware of equal grade.
NOMINAL SIZE CLASS 8.8 CLASS 10.9
& PITCH [GRADE 5 EQUIVALENT] [GRADE 8 EQUIVALENT]
TORQUE FT. LBS. TORQUE N•m TORQUE FT. LBS. TORQUE N•m
Dry Lubed Dry Lubed Dry Lubed Dry Lubed
M4 x 0.7 2.27 1.70 3.07 2.30 2.27 2.31 4.17 3.13
M5 x 0.8 4.58 3.43 6.20 4.65 6.22 4.67 8.43 6.33
M6 x 1 7.75 5.83 10.5 7.90 10.60 7.97 14.3 10.8
M8 x 1.25 18.89 14.17 25.6 19.2 18.95 19.26 34.8 26.1
M10 x 1.25 39.11 29.52 53.0 40.1 53.87 40.59 73.0 55.0
M12 x 1.75 64.94 48.71 88.0 66.0 88.56 66.42 120.0 90.0
M14 x 2 103.32 77.49 140.0 105.0 140.22 107.01 190.0 145.0
M16 x 2 162.36 121.77 220.0 165.0 221.40 166.05 300.0 225.0
M20 x 2.5 317.34 236.16 430.0 320.0 428.04 321.03 580.0 435.0
M24 x 3 516.12 409.59 740.0 555.0 754.38 557.19 1010.0 755.0
M27 x 3 797.04 597.78 1080.0 810.0 1084.86 811.80 1470.0 1100.0
M30 x 3.5 1084.86 811.80 1470.0 1100.0 1476.00 1107.00 2000.0 1500.0
Section 2
SPECIFICATIONS
2-11
685B Motor Grader
Section 2
SPECIFICATIONS
2-12
685B Motor Grader
NOTES
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
OPERATING CONTROLS, INDICATORS, AND GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
TABLE 3-1. OPERATING CONTROLS, INDICATORS, AND GAUGES . . . . . . . . . . . . . . . . . . . . . .3-3
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
OPERATING SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
STOPPING SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
MAINTENANCE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
PRELIMINARY PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
ADJUSTING CONSOLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
ADJUSTING SEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
DEFROSTER FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
OPENING WINDSHIELD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
CAB DOOR RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
BREAK-IN PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
PRE-START INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
ENGINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
STARTING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Preliminary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Engine Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Engine Warm Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Cold Weather Engine Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Cold Weather Engine Warm Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Using Booster Batteries - 12 Volt System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
STOPPING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
EMERGENCY STOPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
ADJUSTING ENGINE FOR HIGH ELEVATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
DRIVING THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
DIRECTIONAL CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
TRAVEL SPEEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
THROTTLE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
BRAKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
PARKING BRAKE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
PARKING THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Section 3
OPERATION
3-1
685B Motor Grader
TABLE OF CONTENTS (Continued)
Page
OPERATING THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
MOLDBOARD LIFT CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
MOLDBOARD SIDE SHIFT CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
MOLDBOARD PITCH CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
MOLDBOARD ANGLE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
WHEEL LEAN CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
OPTIONAL FRONT TRACTION ASSIST CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
SCARIFIER CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
HIGH/LOW TRANSFER CASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
ARTICULATION AND STEERING CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
FRONT BLADE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
SPREADING PILES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
BACKFILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
VEE DITCHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
DITCH CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
ROAD CROWNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
BANK CUTTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
SLOPE WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
CUL-DE-SACS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
TRANSPORTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
MOTOR GRADER TOWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Section 3
OPERATION
3-2
685B Motor Grader
GENERAL INFORMATION
This section provides the Operating instructions for
the Model 685 Motor Grader. It is important to read,
understand, and follow all "Precautions, Operating
Instructions, and Warnings" written in this manual
before starting or operating the machine.
DANGER: Failure to observe the "Operating
Precautions and WARNING
Instructions" provided in this
manual can cause serious injury or
death. Only authorized personnel,
who are fully trained in the machine
operation, can operate the Model
685 Motor Grader.
This machine should be kept in good mechanical
condition at all times.
WARNING: Do not operate a machine needing
repair. Put an information tag on the
instrument panel that says, "DO
NOT OPERATE". Remove the key
from the ignition switch. Repair all
damage at once. Minor damage can
result in major system failures.
OPERATING CONTROLS, INDICATORS,
AND GAUGES
The operating controls for the Model 685 Motor
Grader are shown in Figures 3-1 through 3-4 and
listed in Table 3-1. All of the controls, indicators and
gauges are mounted in the operator's
compartment.
The control panel located to the left of the seat contains
gauges for monitoring engine operation, ignition switch,
system control switches and lights (see Figure 3-1).
The variable speed control, throttle control and main
shut off switch are located on the left hand panel next
to the seat (see Figure 3-1).
The hydraulic control valve, steering wheel console,
console control lever, and optional control switches
are mounted in front of the operator (see Figure 3-2).
The parking brake control and two-speed gear
selector are mounted on the right hand panel next
to the seat (see Figure 3-3).
The traction foot pedal and traction foot pedal lock
are mounted on the floor (see Figure 3-4).
WARNING: Do not start or operate the Model
685 Motor Grader before reading,
understanding, and following all
information given in this section
and shown on the machine. The
operator must read and understand
the function of all controls, indicators, and gauges before starting
the engine. Serious injury or death
can result if these procedures are
not followed.
Refer to Table 3-1 for a list of the controls and a
description of their functions.
Section 3
OPERATION
3-3
685B Motor Grader
FIGURE 3-1. CONTROL PANEL AND LEFT HAND OPERATOR'S PANEL
Section 3
OPERATION
3-4
685B Motor Grader
FIGURE 3-2. STEERING CONSOLE
FIGURE 3-3. RIGHT HAND OPERATOR'S PANEL
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