LeeBoy 785 Operation, Service And Parts Manual
OPERATIONS, SERVICE
AND PARTS MANUAL
785 MOTOR GRADER
785 MOTOR GRADER MANUAL
Manual No. 985480
Courtesy of Machine.Market
Courtesy of Machine.Market
LIMITED WARRANTY
POLICY AND PROCEDURES
688 North Highway 16
Denver, North Carolina 28037
www.LeeBoy.com
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.
785 MOTOR GRADER
Courtesy of Machine.Market
785 MOTOR GRADER
USER'S REFERENCE GUIDE
DELIVERY DATE______________________________________
UNIT SERIAL NUMBER_________________________________
ENGINE TYPE________________________________________
ENGINE NUMBER_____________________________________
DEALER'S NAME AND ADDRESS
_____________________________________________________
_____________________________________________________
PHONE NUMBER_______________________________________
EQUIPMENT HOURS____________________________________
SERVICE MANAGER ____________________________________
688 North Highway 16 • Denver, North Carolina 28037 • www.LeeBoy.com • (704) 966-3300
785 MOTOR GRADER
Courtesy of Machine.Market
785 MOTOR GRADER
MODEL 785 MOTOR GRADER
OPERATORS, MAINTENANCE AND PARTS MANUAL
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
SIDE VIEW
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.
785 MOTOR GRADER
REAR VIEW
FM-1
Courtesy of Machine.Market
785 MOTOR GRADER
SAFETY INSTRUCTIONS
IIMMPPOORRTTAANNTT
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
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.
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.
DANGER
FM-2
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.
785 MOTOR GRADER
Courtesy of Machine.Market
785 MOTOR GRADER
SAFETY PRECAUTIONS
If your motor grader has been repainted, it
is extremely important that all the decals
referring to cautions warnings 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 on
location is provided for each decal. If you
still 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.
785 MOTOR GRADER
785 DECALS and DECAL LOCATIONS
FM-3
Courtesy of Machine.Market
785 MOTOR GRADER
PRE-START INSPECTION
INSPECT machine. Have any malfunctioning,
broken or missing parts corrected or replaced
before using. Hydraulic hoses should be checked
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.
FILL the fuel tank with the engine off. Never fill fuel
tank near an open flame, when smoking.
Make sure all covers and guards are in place.
OPERATING SAFETY
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 if possible.
ALWAYS look BEFORE changing your direction of
travel.
AVOID leaving engine running without operator
present.
ALWAYS wear your seatbelt.
NEVER attempt to jump clear of a tipping machine.
FATAL crushing injuries will result.
BEFORE moving machine, check that all persons
are clear.
When a signal person is used, BE SURE the
person is in view at all times.
To prevent rollaway accidents, MAKE SURE
machine is properly secured before leaving
operator's seat.
NEVER attempt to mount or stop a moving
machine.
USE handholds and steps when getting on or off
machine. Be CAREFUL of slippery conditions.
STOPPING SAFETY
ALWAYS park the motor grader on solid, level
ground in low range. If this is not possible, always
park the motor grader at a right angle to the slope.
USE proper flags, barriers and warning devices
especially when parking in areas of traffic.
DRIVING SAFETY
Know location of all bystanders before moving
machine.
BE SURE backup warning system is properly
operating.
USE a signal person when moving the machine.
AVOID power line, serious injury or death may
result.
KEEP riders off the machine.
MAINTENANCE SAFETY
NEVER work on the motor 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.
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.
CLEAN trash from machine. Keep engine
compartment and operator's station clean.
WARN others of Service Work. Before performing
any machine work attach a "DO NOT OPERATE"
tag to steering wheel.
UNDERSTAND the service procedure before
beginning work.
ALWAYS lower attachments and implements to the
ground before servicing. If work is required on a
lifted machine or attachment, properly SUPPORT
machine attachment or implement before working
on it.
FM-4
785 MOTOR GRADER
Courtesy of Machine.Market
Section 1
INTRODUCTION
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
CONTROLS AND OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
NAMEPLATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
8500 Conveyor Paver
1-1
Courtesy of Machine.Market
Section 1
INTRODUCTION
GENERAL INFORMATION
This manual contains Specification information,
Controls and Operating Procedures, Maintenance
and Repair Procedures and Parts Lists for the 785
Motor Grader.
SPECIFICATIONS
Refer to Section 2 - SPECIFICATIONS in this
manual for all major system specifications and for
typical torque value tables.
CONTROLS AND OPERATING
INSTRUCTIONS
Refer to Section 3 - OPERATION.
The operator of this equipment should READ,
UNDERSTAND, and FOLLOW the operating
instructions, Cautions, and Warnings provided in
the front of this manual and in the OPERATION
section.
WARNING: Do not attempt to operate the 785
Motor Grader unless fully trained
in the machine operation, only
authorized personnel should oper-
ate the Model 785 Motor Grader. All
instructions provided in this manu-
al and on the machine operating
and warning decals must be fol-
lowed to prevent damage to the
equipment and/or injury to operat-
ing personnel.
MAINTENANCE PROCEDURES
Refer to Section 4 - MAINTENANCE in this manual
for all maintenance and repair 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.
NAMEPLATE
The Nameplate, Figure 1-1, contain the serial
number and basic data used to identify the specific
model on the Motor Grader.
1-2
FIGURE 1-1. NAME PLATE
8500 Conveyor Paver
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
TABLE 2-1. ENGINE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
TABLE 2-2. ELECTRICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
TABLE 2-3. DIMENSION SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
TABLE 2-4. PERFORMANCE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
TABLE 2-5. SCARIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
TABLE 2-6. MACHINE SYSTEM CAPACITY SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
TABLE 2-7. MOLDBOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
TABLE 2-8. HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
TABLE 2-9 TRANSMISSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
TABLE 2-10. TYPES OF LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
TABLE 2-11. TIRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
TABLE 2-12. TORQUE SPECIFICATIONS FOR STANDARD INCH FASTENERS . . . . . . . . . . . . . . .2-6
TABLE 2-13. TORQUE SPECIFICATIONS FOR METRIC FASTENERS . . . . . . . . . . . . . . . . . . . . . .2-7
785 Motor Grader
2-1
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
GENERAL INFORMATION
The specifications provided in this section are applicable to the Model 785 Motor Grader. Included in this section
are machine weights, dimensions, performance and torque values for both metric and standard inch fasteners.
TABLE 2-1. ENGINE SPECIFICATIONS
ITEM CHARACTERISTIC
ENGINE
Manufacturer . . . . . . . . . . . . . . . . . . . . . .Cummins 3.9L
Horsepower . . . . . . . . . . . . . . . . . . . . . . .130 HP @2500 rpm
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . .Four Stroke Turbo Charged and Charge Air
Cooled, In-Line 4 cylinder Diesel engine
(Tier II Compliant)
Bore & Stroke . . . . . . . . . . . . . . . . . . . . .4.02 in. [102 mm] x 4.72 in. [120 mm]
Displacement . . . . . . . . . . . . . . . . . . . . .238 cu. In.
Compression Ratio . . . . . . . . . . . . . . . . .18:01
Maximum Net Torque . . . . . . . . . . . . . . .355 Pound/Foot @1500 rpm
Lubrication system . . . . . . . . . . . . . . . . .Pressure System With Full Flow Filter
Air Cleaner . . . . . . . . . . . . . . . . . . . . . . .Two Stage Dry Element
Engine Oil Type . . . . . . . . . . . . . . . . . . .10W-40
Capacity . . . . . . . . . . . . . . . . . . . . . . . . .10 Quarts [9.46 liter]
ENGINE COOLING SYSTEM
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . .Liquid,
ENGINE FUEL
Type Used . . . . . . . . . . . . . . . . . . . . . . . .Diesel Fuel
Fuel Capacity . . . . . . . . . . . . . . . . . . . . .50 gallons [189.3 liters]
FUEL FILTER
Spin-On . . . . . . . . . . . . . . . . . . . . . . . . .Cummins P/N 3991498/Fleetguard FS19616
In-Line . . . . . . . . . . . . . . . . . . . . . . . . . .P/N 981937
2-2
TABLE 2-2. ELECTRICAL SPECIFICATIONS
ITEM CHARACTERISTIC
BATTERY
Number Per Machine . . . . . . . . . . . . . . . .Two maintenance free
Ampere Hour Rating . . . . . . . . . . . . . . . .950 CCA
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .12 Volts
ALTERNATOR
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .12 Volt, negative ground
Output Amperage . . . . . . . . . . . . . . . . . .100 Amps
Fan Belt Tension . . . . . . . . . . . . . . . . . . .Belt tension mechanism keeps serpentine
belt under tension at all times
STARTER
Manufacturer . . . . . . . . . . . . . . . . . . . . . .(See Engine Starter plate)
Voltage and Type . . . . . . . . . . . . . . . . . . .12 Volt, negative ground
785 Motor Grader
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SPECIFICATIONS
TABLE 2-3. DIMENSION SPECIFICATIONS (see Figure 2-1)
ITEM SPECIFICATION
DIMENSIONS
Overall Length . . . . . . . . . . . . . . . . . . . . . . . . .26 ft. [7.92 m]
Overall Length w/Rear mounted Scarifier . . . . .28 ft. [8.5 m]
Overall Height . . . . . . . . . . . . . . . . . . . . . . . . . .10 ft. [3.0 m]
Overall Width . . . . . . . . . . . . . . . . . . . . . . . . . .7 ft. [2.4 mm]
Wheelbase . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 ft. 4 in. [5.3 m]
Tandems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 ft. 11 in. [1.5 m]
Weight Total . . . . . . . . . . . . . . . . . . . . . . . . . . .25,300 lbs. [11476 kg]
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7,800 lbs. [3538 kg]
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17,700 lbs. [8029 kg]
Section 2
SPEED
Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 - 21 mph [0 - 33.8 km/hr]
ARTICULATION . . . . . . . . . . . . . . . . . . . . .40° Total
WHEEL LEAN . . . . . . . . . . . . . . . . . . . . . . .17° each direction, 34° Total
STEERING . . . . . . . . . . . . . . . . . . . . . . . . .Hydraulic Power Steering
TURNING RADIUS
Straight Frame . . . . . . . . . . . . . . . . . . . . .20 ft. [6.1 m] inside & 33 ft. [10.0 m] outside
Articulated . . . . . . . . . . . . . . . . . . . . . . . .13 ft. [3.96 m] inside & 23.5 ft. [8.16 m] outside
785 Motor Grader
FIGURE 2-1. OUTLINE DIMENSIONAL DRAWING
TABLE 2-4. PERFORMANCE SPECIFICATIONS
ITEM SPECIFICATION
2-3
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
Item Front Rear
Spacing 4.5 in. [11.4 cm] 6 in. [15.2 cm]
Width 46 in. [116.8 cm] 73 in. [185.4 cm]
Lift Above Ground 17 in. [43.2 cm] 17 in. [43.2 cm]
Penetration 12 in. [30.5 cm] 12 in. [30.5 cm]
TABLE 2-6. MACHINE SYSTEM CAPACITY SPECIFICATIONS
ITEM SPECIFICATION
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 Gallons [189.3 L]
Cooling System . . . . . . . . . . . . . . . . . . . .5.25 Gallons [19.9 L]
Crankcase . . . . . . . . . . . . . . . . . . . . . . . .2.5 Gallons [9.5 L]
Hydraulic Oil Reservoir w/oil cooler . . . . .18 Gallons [68.1 L]
TABLE 2-5. SCARIFIER
TABLE 2-7. MOLDBOARD
ITEM SPECIFICATION
Length . . . . . . . . . . . . . . . . . . . . . . . . . .12 ft. 0 in. [3 m]
Height . . . . . . . . . . . . . . . . . . . . . . . . . . .20 in. [0.5 m]
Cutting Edge Thickness . . . . . . . . . . . . . .0.625 in. [1.588 cm]
Cutting Edge Width . . . . . . . . . . . . . . . . .6 in. [0.15 m]
Edge Tip Cutting Edge . . . . . . . . . . . . . .0.625 in. [1.588 cm]
TABLE 2-8. HYDRAULIC SYSTEM
ITEM SPECIFICATION
Hydraulic Pumps . . . . . . . . . . . . . . . . . .Pressure compensated load sensing
proportional Hydraulic pump system
Hydraulic Oil Reservoir w/oil cooler . . . . .18 Gallons [68.13 liters]
Hydraulic Pressure Control System . . . . .2600 PSI (Operating)
325 PSI (Standby)
2-4
785 Motor Grader
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
TABLE 2-9 TRANSMISSION
ITEM SPECIFICATION
Type . . . . . . . . . . . . . . . . . . . . . . .Powershift, 6-speed forward/3-speed reverse
Shift Position Forward Speed (mph) Reverse Speed mph)
1 . . . . . . . . . . . . . . . . . . . . . . .2.8 . . . . . . . . . . . . . . . . . . . .2.7
2 . . . . . . . . . . . . . . . . . . . . . . .4.0 . . . . . . . . . . . . . . . . . . . .6.2
3 . . . . . . . . . . . . . . . . . . . . . . .6.3 . . . . . . . . . . . . . . . . . . .14.2
4 . . . . . . . . . . . . . . . . . . . . . . .9.1
5 . . . . . . . . . . . . . . . . . . . . . . .14.7
6 . . . . . . . . . . . . . . . . . . . . . . .21.1
TABLE 2-10. TYPES OF LUBRICANTS
ITEM SPECIFICATION
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . .10W-40
Hydraulic Oil . . . . . . . . . . . . . . . . . . . . . .AW #68
TABLE 2-11. TIRES
ITEM SPECIFICATION
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . .13.00 x 24
Quantity . . . . . . . . . . . . . . . . . . . . . . . . . 6
785 Motor Grader
2-5
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
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
2-6
785 Motor Grader
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
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
785 Motor Grader
2-7
Courtesy of Machine.Market
Section 2
SPECIFICATIONS
NOTES
2-8
785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
TABLE OF CONTENTS
Page
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
OPERATING CONTROLS, INDICATORS, AND GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Operating Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Stopping Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Maintenance Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Receiving Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Inspection Before Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Preliminary Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Adjusting Front Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Air Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Defroster Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Opening Windshield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Cab Door Release Levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Cab Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Console Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
DRIVING THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Startup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Using Booster Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Engine Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Auto Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Moving Forward/Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
Stopping and Restarting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Moving Forward/Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Stopping and Restarting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
OPERATING THE MACHINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Blade Lift Levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Moldboard Slide Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Blade Tilt Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
785 Motor Grader
Courtesy of Machine.Market
3-1
Section 3
OPERATION
Circle Turn Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Circle Shift Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Articulation Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Leaning Wheel Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Scarifier Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Differential Lock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Moving Blade to Bank Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Blade Side Thrust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Blade Pitch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
Pile Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21
TABLE OF CONTENTS (Continued)
Page
Back Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Vee Ditching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
First Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Second Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Third Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Spreading Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Cutting Back Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Cleaning Ditches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Road Crowning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Bank Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Slope Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Cul De Sacs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
LOADING THE GRADER ON A TRAILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
TOWING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-24
3-2 785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
GENERAL INFORMATION
This section provides the Operating Instructions for
the Model 785 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 “Precautions,
Operating Instructions and
Warnings” provided in this manual
can cause serious injury or death.
Only authorized personnel, who are
fully trained in the machine opera-
tion, can operate the Model 785
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
Operating controls for the Model 785 Motor Grader
are shown in Figures 3-1 through 3-6 and listed in
Tables 3-1 through 3-6.
WARNING: Do not start or operate the Model
785 Motor Grader before reading,
understanding and following all
information given in this section
and shown on the machine. The
operators must read and under-
stand the function of all controls,
indicators, and gauges before
starting the engine. Serious injury
or death can result if these proce-
dures are not followed.
785 Motor Grader
3-3
Courtesy of Machine.Market
Section 3
OPERATION
3-4
FIGURE 3-1. LOCATION OF CONTROL GROUPS
785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
TABLE 3-1. OPERATING CONTROL GROUPS (see Figure 3-1)
ITEM NO. NAME TYPE FUNCTION
1 Air Conditioning Control Provide control of the air conditioning unit.
Panel Also contains the windshield washer reservoir.
See Figure 3-2 for detailed breakdown.
2 Gauges Panel Contains seen gauges that monitor machine
operation. See Figure 3-3 for detailed breakdown.
3 Warning Indicator and Contains warning indicators and light switches.
Light Switch Panel See Figure 3-4 for detailed breakdown.
4 Steering and Control Contains all grader control levers and the
Lever Group steering wheel. See Figure 3-5 for detailed
breakdown.
5 Throttle, Brake, Contains driving controls and switches.
Transmission, Stop See Figure 3-6 for detailed breakdown.
Controls and Main Switch
Panel
6 Foot Pedals Pedals Pressing the left pedal down applies the service
brake applies the service brake and declutches
the transmission. Pressing the right pedal
controls the throttle.
7 Left Door Release Lever Lever Holds left door open.
8 Dash Tilt Lever Lever Position dash for most comfortable operator
position.
9 Front Windshield Latch Lever Allows front windshield to be opened.
10 Right Door Release Lever Lever Holds right door open.
11 Seat Operator's seat.
785 Motor Grader
3-5
Courtesy of Machine.Market
Section 3
OPERATION
3-6
FIGURE 3-2. AIR CONDITIONING CONTROL PANEL
785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
TABLE 3-2. AIR CONDITIONING CONTROL PANEL (see Figure 3-2)
ITEM NO. NAME TYPE FUNCTION
1 Washer Fluid Reservoir Provides storage for the windshield washer fluid.
2 TEMP Switch Rotary Adjusts the output temperature of the air
switch conditioner.
3 A/C On/Off Switch 2-Position Turns air conditioner On or Off.
toggle
switch
4 Fan Speed Rotary Adjust speed of blower fan.
switch
5 Vent Opening Output vent for the air conditioner output air.
6 Cup Holder Hold drinking cup.
785 Motor Grader
3-7
Courtesy of Machine.Market
Section 3
OPERATION
3-8
FIGURE 3-3. GAUGE PANEL
785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
TABLE 3-3. GAUGE PANEL (see Figure 3-3)
ITEM NO. NAME TYPE FUNCTION
1 FUEL Gauge Gauge Indicates the amount of fuel remaining in the
tank.
2 Articulation Gauge Gauge Indicates degrees of articulation both left and
right.
3 Engine Water Gauge Indicates the temperature of the water in the
Temperature Gauge engine cooling system.
4 Engine Oil Pressure Gauge Indicates engine oil pressure.
Gauge
5 Total Time Display Indicates total operating time of the Engine.
Module
6 Transmission Gauge Indicate the temperature of the transmission fluid.
Temperature Gauge
7 Engine RPM Gauge Indicate engine RPM.
785 Motor Grader
3-9
Courtesy of Machine.Market
Section 3
OPERATION
3-10
FIGURE 3-4. WARNING INDICATORS AND LIGHT SWITCH PANEL
785 Motor Grader
Courtesy of Machine.Market
Section 3
OPERATION
TABLE 3-4. WARNING INDICATORS AND LIGHT SWITCH PANEL (see Figure 3-4)
ITEM NO. NAME TYPE FUNCTION
1 L SIGNAL R Switch 3- Position Activates either Left or Right Turn signals.
toggle
switch
2 Left Turn Indicator Indicator Flashes to indicate the Left turn lights are
light operating.
3 Transmission Warning Indicator Illuminates to indicate when the transmission oil
Indicator light temperature is too high.
4 Low Brake Pressure Indicator Illuminates to indicate the brake pressure is
Indicator light too low.
5 Air Cleaner Restriction Indicator Illuminates to indicate the air cleaner needs to
Indicator light be serviced.
6 Park Brake Indicator Indicator Illuminates when the Parking Brake is applied.
light
7 Right Turn Indicator Indicator Flashes to indicate the Right turn lights are
light operating.
8 BEACON Light Switch Two Turns Beacon Light On or Off.
position
toggle
switch
9 Hazard Light Switch Two Turns Hazard Lights On or Off.
position
toggle
switch
785 Motor Grader
3-11
Courtesy of Machine.Market
Section 3
OPERATION
3-12
FIGURE 3-5. STEERING AND CONTROL LEVER GROUP
785 Motor Grader
Courtesy of Machine.Market
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