New Holland SF550 Operating instructions

NEW HOLLAND
SF550
86611363 8/00
REPAIR
MANUAL
El
I\EW HOLLAN)
SERVICE
IReprinted I

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SECTION 00 a GENERAL INFORMATION
00 .. GENERAL INFORMATION
Chapter 1 ... General Information
CONTENTS
Section
Description
Page
Precautionary Statements ..... .' .............................................. ~2
Safety Precautions .......................................................... ~3
Safety Decals ....................................•.......................•. , ~8
Minimum Hardware Tightening Torques ....................................... ~12
0·1
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SECTlON 00 - GENERAL INFORMATION
PRECAUTIONARY
STATEMENTS
PERSONAL SAFETY
Throughout this manual and on machine decals, you will find precautiona,y statements ("CAUTION",
"WARNING", and "DANGER") followed by specific instructions.These precautions are intendedforthepersonal
safety of
you and those working with you. Please take the time to read them.
A CAUTION A
Theword "CAUTION" is used whereasafe behavioral practiceaccordingtooperating and maintenance
instructions and common safety practices will protect the operator and others from accident
involvement.
A DANGER A
The word "DANGER" denotesa forbidden practice in connection with a serioushazard.
A WARNING A
The word "WARNING" denotesa potential or hiddenhazard which has a potential for serious injury. It
is used to warn operators and others to exercise every appropriate means to avoid a surprise
involvementwith machinery.
FAILURE TO FOLLOW THE "CAUTION", "WARNING", AND "DANGER" INSTRUCTIONS MAY RESULT IN
SERIOUS BODILY INJURY OR DEATH.
MACHINE SAFETY
Theprecautionary statement ("IMPORTANT) isfollowed by specific instructions. This statementisintended for
machine safety.
IMPORTANT: The word "IMPORTANT" is used to inform the reader of something he needs to know to prevent
minor
machine damage if a certain procedure is not followed.
0-2
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SECTION 00 ~ GENERAL INFORMATION
SAFETY PRECAUTIONS
Most farm implement accidents can be avoided by the observance of a few simple safety precautions.
OPERATIONAL SAFETY
GENERAL
1. Do not let anyoneoperate the SFSS0 without
proper instructions.
2. This book contains important information
aboutthesafe operation and maintenance
of
your SFSSO. Manufacturers of New Holland/
Ag-Chem components also
supply books.
Read and understand theae
books before
you operate the SF550.
If you do not
understand any information found in this
manual, contact New Holland service.
3. Read and understand all safety/precaution•
ary statements
in this manual.
4. Leam how to operate the machine and use
the controls properly.
5. Make sure the vehicle and systems are in
good operatingcondition. Checkthelubrica•
tion andmaintenanceschedules in this book.
6. Unauthorized modffications to the machine
may impair
the function and/or safety, affect
machinelife, andmayvoid the SFSSO warranty.
VEHICLE OPERATION
1. Wear a seatbelt at aH times.
2. Make sureall wheel boltsare torqued before
operating 472
N·m (340 ft. lbs.).
3.
Be sure the ledder and operator areas are
clean and
dry to helppreventinjury.
4. Wam all personnel in the area before
operating
the vehicle. Operate the hom
before startingthe engine.
5. Do not permitanypassengers on thevehicle
when it is in operation.
6. Engage
the parking brake and place the
hydrostatic drive lever in neutral before
starting
the engine.
7. Stop
the vehicle and tum the engine off
beforeinspectinganydamageif the machine
should
hit something.
8. Stop the vehicle immediately if there
is a
faHura
in the engine or hydraulicsystem. Do
not turn off the keyswitch until thevehicle is
stopped.
9. Do
not carry morethan the load capacity of
thevehicle.
10. Never try to get on or off a moving machine.
11. When leaving the machine unattended,
engage
the parking brake and remove the
key.
12. Do not wear radio or music headphones
while operating the vehicle. Operating
equipmentsafelyrequires
the fuHattention of
the operator.
RUNAWAY MACHINE
1. Avoid possible injury or deathfrom machine
runaway.
2. Do not start the engine by shorting across
starterterminals.Machine
will startmoving if
normal circuitry is bypassed.
3. Never start the engine whilestanding on the
ground.Startengine only from theoperator's
seat, with hydrostatic drive lever in neutral
and the parking brake engaged.
SAFETY LIGHTS ANO DEVICES
1. Flashing warning lightsand tum signals are
recommended whenever
driving on public
roads. To increase visibility, use the lights
and devices provided with your vehicle. Keep
safety items in good condition. Replace
missing
or damaged items.
2. Slow moving vehicles can create a hazard
when traveling on public roads. They are
difficult to see, especially at night. Use the
lights and devices provided with your
vehicle. Avoid injury or deathfroma collision
with a vehicle.
OPERATING ON SLOPES
1. Avoid holes, ditches and obstructions that
may cause vehicle roll-over, especially on
hillsides. Avoid sharp turns on hills.
2. Never drive near the edge of a gully or steep
embankment.
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SECTION 00 - GENERAL INFORMATION
TRAVELING ON PUBLIC ROADS
A CAUTION A
This vehicle was designed for applying chemi•
cals and fertilizers in off-roaduse. Do not use the
vehicle for transporting product over public
roads. Chemical spills may occur resulting in
environmental damage. A loaded vehicle driven
on public roads also runs the high risk of tire
failure. Personal
injury could result.
1. Always walk around and visually inspect the
entire vehicle before traveling on public
roads.
2. Check for damageandfailure of anything that
may create a hazard or be unsafe. Repair or
replace it.
3. Make sure all vehicle systems operate,
including, but not limited to: front roadlights,
tail lights, hazard warning lights, safety
lights,parking brake,
hom, windshield wiper
andwasher, and rear view mirrors.
4. Follow an traffic rules.
5. Have hazard warning lights on, unless
prohibited by law.
6. It is the operator's responsibility to deter-
mine if field lights areneeded while traveling
on public roads.
STOPPING AND PARKING
A DANGER A
Machine roll-over, collisions, runaway machines,
and people being crushed under machines can
happen when operators
ignore safety.
1. Signal before stopping, turning or slowing
down on public roads.
2. Pullover to the side of roadbefore stopping.
3. Be careful when stopping on slippery
surfaces.
4. Be careful when towing and stopping with
heavy loads.
5. Engage the parking brake.
6. Remove the key to prevent unauthorized
personnel
from operating the machine.
BOOM SAFETY
1. Make sure no person or object is in the path
of the booms, especially when retracting or
extending.
2. Be aware of the boom location at all times.
3. Retract and lock booms except during
application.
RADAR GROUND SPEED SENSOR
NOTE: Radargroundspeedsensorsemita ve,ylow
intensity microwave
signal. It will not cause any ill
effects during
normal use.
1. Although microwave intensity is low, do not
look directly into the face of the radar ground
speed sensor while in operation to avoid any
possible eye damage.
EXHAUST FUMES
1. Neveroperate the engine in a building unless
adequate ventilation is provided to remove
exhaustfumes.
OVERHEAD ELECTRICAL POWER LINES
1. The radio antenna must be bent over and
secured any time the vehicle may come into
contact with a high voltage electrical line or
when the vehicle is transported.
NOISE A
CAUTION A
Long periods of loud noise can cause loss of
hearing.
1. Wearanearprotectiondevice during periods
of loud noise.
FUEL HANDLING
1. Add fuel in a safe place away from open
flames
or sparks.
2. Stop the engine and don't smoke when
adding fuel to the vehicle.
3. Do not fill the tankcompletely to the top.
4. Wipe up any fuel spiffs immediately.
5. Do not use diesel fuel, keroHna or gasoline
for cleaning metal parts.
6. Have a multipurpose dry chemical fire extin-
guisher filled and available. Knowhow to UH it.
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SECTION 00 ~ GENERAL INFORMATION
MOVING PARTS
1. Keep guards andcovers in place at all times
when operating tha vehicle.
2. Stop tha enginebeforeremovingguardsand
shields.
3. Keep clothing and body parts away from
moving parts.
MAINTENANCE AND SERVICE SAFETY
·
GENERAL
1. Understand maintenance and service proce-
dures before doing work.
2. Tie long hair behind your head.
3. Never lubricate, service, or adjust vehicle
while it is moving.
4. Keep hands, feet, and clothing from power
driven parts.
s. Disengage all powerand operate controls to
relieve pressure. Stop engine. Remove the
key. Allow vehicleto cool down.
CLOTHING
1. Wear close fitting clothes and safety
equipmentrequired
for the job.
2. Do not weara necktie, scarf, loose clothing,
or a necklace when working near machine
tools or moving parts.
3. Remove rings and othar jewelry to prevent
electrical
shorts and contact with moving
parts.
WORK AREA
A CAUTION A
Dirty and greasy areas can create work hazards.
1. Thoroughly clean the work area and the
vehicle beforestarting a job.
2. Light your working area adequately and
safely. A CAUTION A
An exposed bulb can ignite fluids.
0-5
3. Useproper safety lights with wire cages.
4. Catch draining fluids in proper containers,
not beverage containers that can mislead
personnel
to drink from them.
TOOLS
1. Makeshift tools andprocedurescreate safety
hazards.
2. Use ·power tools only to loosen threaded
parts and fasteners.
3. Do not use metric tools for US fasteners or
vice,.versa.
SUPPORTING THE MACHINE
1. Do not support the machine on cinderblocks,
hollow tiles, or props that may crumble.
2. Do not work under a machine that is only
supported by a jack.
LIFTING THE MACHINE
1. Lifting incorrectly causes severe injury or
machine damage. Follow the recommended
procedure
for removal and installation of
components in this manual.
HIGH PRESSURE FLUIDS
1. Stop the vehicle and allow it to cool before
checking fluids.
2. Use caution when removing radiator caps,
plugs, grease fittings,
or pressuretaps.
3. Do not open air lines when thay are under
pressure. Release all air pressure before
doing maintenance or repairs on tha air
system. A WARNING A
Hydraulicfluid or dieselfuel, under pressure,can
cut the skin, cause bad bums, eye injury, or skin
irritation.
4. Do not openhydrauliclines or fuel lineswhen
thay areunderpressure.
5. Useapiece
of wood to check for leaks.Do not
use your hands.
6. Get medical
help immediately if any person-
nel are injured by hydraulic fluid or fuel.
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SECTION 00 • GENERAL INFORMATION
HEATING NEAR PRESSURIZED FLUID
LINES A DANGER A
Pressurized lines can be accidentally cut when
heat goes beyond the immediate flame area.
Flammable spray can be generated by heating
near pressurized fluid lines, resulting
in severe
burns
to yourselfand bystanders.
1. Avoidheatingnearpressurizedfluidlines.
Do
not heat by welding, soldering, or using a
torch near pressurized fluid lines
or other
flammable materials.
REMOVAL OF PAINT BEFORE WELDING
OR HEATING
A CAUTION A
Hazardousfumescanbegeneratedwhenpaint is
heated by welding, soldering, or using a torch.
1. Remove paint before welding
or heating.
2. Do all workoutside in a well-ventilated area.
3. Avoidpotentiallytoxicfumesand dust.While
sanding
or grinding paint, avoid breathing
the dust. Wear an approved respirator.
4. If you use solvent or paint stripper, remove
stripper with soapand waterbeforewelding.
5. Remove solvent or paintstrippercontainers
and other flammable material from the area
prior
to welding.
6. Allow fumes to disperse at least 15 minutes
beforewelding or heating.
7. Dispose of paintand solventproperly.
COOLING SYSTEM
A WARNING A
Explosive release of fluids from pressurized
cooling systemcan cause serious burns.
1.
Shut offengine.
2. Removefillercaponlywhen it
is coolenough
to touch with bare hands.
3. Slowly loosen cap
to the firststop to relieve
pressure before removing
It completely.
BATTERIES
A CAUTION A
A lead acid battery will generate flammable and
explosive gases.
Battery acid will cause bad
bums.
1. Keep sparks and flames away from the
battery.
2. ff acid contacts eyes, skin or clothing, flush
them with water. For contact
with eyes get
immediate medical help.
TIRES AND WHEELS
A DANGER A
Failure to follow correct instructions when
mounting a tire on a wheel or rim can cause an
explosion andserious injury.
1. Never weld on a wheel or rim that has a tire
with airpressure.
2.
Do not attempt to mountatire on arimunless
you have the correct equipment, instruc-
tions,and training
to do the work safely.
3. Have tire repairs done by trained tire repair
personnel.
WASTE DISPOSAL
NOTE: Improperly disposing of waste can threaten
the environmentand ecology.
1. Oil, fuel, fluids and batteries can generate
potential harmful waste.
2. Use leak proof containers when draining
fluids.
3. Whencollectingwastefluids, do not use food
or beverage containers that may mislead
someone intodrinking from them.
4. Do not pourwaste ontothe ground, down a
drain,
or intoany water source.
NOTE: Airconditioningrefrigerantsescaping into the
air can damage the Earth's atmosphere.
5. Government regulations may require a
certified air conditioning service center
to
recover and recycle used air conditioning
refrigerants. '
6. Inquire on the proper way to recycle or
dispose of waste from your local environ-
mental
or recycling center.
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SECTION 00 ~ GENERAL INFORMATION
CHEMICAL SAFETY
GENERAL
1. The cab filters may not filter out dangerous
chemicals. Follow instructions given by the
chemical manufacturer.
2. Do not spray chemicals when the wind is in
excess of the chemical manufacturer's
recommendation.
3. Never allow chemical to contact the skin or
eyes.
4. Wear approved protective equipment and
clothing.
5. Before leaving the cab, wear personal
protective equipment as required
by pesti-
cide use instructions.
6. When ~tering the cab, remove protective
equipmentandstoreeitheroutsidethecab
in
a closed box or some other type of sealable
container
or inside the cab in a pesticide
resistant container, such as a plastic
bag.
7. · Clean yourshoes or boots to remove soil or
other contaminated pesticides prior to
entering the cab.
8. Select an area to fill, flush, calibrate and
decontaminate the SF550 where chemicals
wiH not drift or runoff to contaminatepeople,
animals, vegetation, water supply, etc.
9. If chemicals come in contact with the body,
wash immediately,according
to the chemical
manufacturer's recommendations.
1
o. Neverplacenozzlestips or otherparts to lips
to blow out blockage. Have spare tips
available for replacement.
11. Clean the SF550 of chemicals after use.
Chemical residue can build
up on the inside
and. outside of the SF550.
0-7
POLYETHYLENE TANKS AND HOSES
1. Owners/operators of chemical application
machines, including the SF550, must be
aware that some agricultural chemicals can
penetrate into the polyethylene
tank wall
used to hold various liquids for agricultural
application and/or the walls
of connecting
hoses. A CAUTION A
Use of different chemicals could create a
situation in which personal injury, crop, soil, or
other damage could occur depending on the
properties
of thechemicals involved.
2. There is a possibility
that certain chemicals
subsequently introduced into the tank may
cause some leaching
of a previously used
chemical from
the tank wall.
A CAUTION A
Prior use of certain chemicals may prevent the
appropriate and safe use of other chemicals
later.
3. Before making any decision regarding the
later use of differentchemical solutions, the
owner/operator should consider this leech-
ingtraitand consulttheirchemicalsuppliers
regarding any potential effects.
4. Repeated flushings between appropriate
chemical changes are recommended. (see
"FlushingThe LiquidSystem"
in this manual
for properprocedures.)
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SECTION 00 - GENERAL lNFORMATION
SAFETY DECALS
The following safety decals have been placed on
your machine
!n the areas Indicated. They are
intended for your personal safety and for those
working with you. Please take this manual and walk
aroundyourmachinetonotethecontentandlocation
of these warning signs.
30097635
Review these decals and the operating instructions
in this manual with yourmachine operators.
Keep the decals legible. If they are not, obtain
replacements from your designated New Holland
dealer.
1
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0
SECTION 00 - GENERAL INFORMATION
A CAUTION
WHEEL MOUNTING PROCEDURE
I) MOUNT ING fACES OF MOTOft, HEI. DISC, MCl 1.00
wrs SCATS wsr ll£ f'lltt OF l'~IQN IIAtERIAI..
2) PILOT HEL OVEa lll)lOft ASSlllUHG PIIOf'ER
AUGNME!fT Of IIOUIITl!lli HOI.ES.
3) IIMD STMT LI.IC M.ltS MCl HGll'ftlf,
◄) TORQUE ALL LOG IIIITS TO A tORQUI/ OF 150 n-t.es
111 STM!: PATTEIUI. tli£lf TO 340 f'T-L&S
5) AFTER 8 H0llllS OF SfRVICI! AND PERIOOICM.I.Y
THERE:MTER, lOOSfff LUG NUTS 1/4 TURN
MC) REl"EAl TIGll'ftlflkll ~.
© <®>
PARKING BRAKE
DEPRESS AND LATCH
LEAVING CAB
IMPORTANT
VS£ OF nus BRAKE AS A SERVICE BRAKE
flHlE VEtUCU'. 1$ IN MOTION COUU)
RESULT IN EXTENSIVE DAMAGE TO THE
ffYMMJLJC SYSTEM
A WARNING
PLACE VEHICLE IN LOW RANGE SEFORE OPERATING
ON A STEEP GRADE. FAILURE TO COMPLY
MAY RESULT IN LOSS OF VEHICLE CONTROL,
RESULTING JN SERIOUS INJURY OR DEATH.
CAUTION
1. Before operating machine, read
Operators Manual for complete
instructions
and safety
information.
2. Make certain everyone is clear
of machine before starting
engine or
operation.
3. Keep all riders off machine
and equipment
4. To help prevent tipping,
reduce
speed when tuming or
applying individual brakes or
operating
around hazards, on
rough ground or slopes.
5. Do not operate on steep slopes.
6. Hazard of an overturn increases
greatlywith
narrow wheel
spacing. Avoid sharp turns.
7. Use
highway
law,
8. Stop engine and lock brakes
before dismounting. Wait for
all movement to stop before
servicing machinery.
9. Remove key if leaving machine
unattended.
2

0
SECT!ON00-
AwARNING
To avoid possible eye
damage from micro-
wave signals emitted
by this radar sensor,
do not look· directly
intosensorface.
0-10
INFORMATION
A.WARNING
l. AI..WAY$-FAee_Jlffl>_(;U)TIIING
-!i'NUSIIIO!'l)\/CT!)R.
2. R!!Al)Jlffl>11ffl!£11$TJlffl>t.--Sl!CTIOIIOF
OFl!!IAT011$-l!Ef0ffl\:I/Sf!'IQ-
~. Al.WAY$ O!'l!N mucroo !.!NE VAl..111:i IIE!'O!lltOl'!!NINO
iWUCTQl'I \IAl..1/E.
l!OUl'.:'\'00 VALVE
-7
3

SECTION 00 - GENERAL INFORMATION
A DANGER
MOVING
PARTS
00 NOT STAND NEAR OR 1.N'ER 800M.
FAIUJAE 1'0 ~ CCUl> RESULT IN
SERIOl..lS 1N.ruRY OR DEATH.
""'"
,? r
·~
& CAUTION
DO NOT ATTEMPTTO OPERATE VALVE
MANUAL OVERRIDES FROM GROUND
LEVEL MANUAL OVERRIDES ARE TO
BE OPERATED FROM THIS POSITION
ONLY. FAILURE TO COMPLY COULD
RESULT !N BODILY INJURY.
@)
"'
READ AND
UNDERSTAND
OPERATORS MANUAL
BEFORE
OPERATING VEHICLE
WARNING
MAXIMUM VEHICLE SPEED
~ MAXIMUM SPEED
DTll/12.4-38 25MPH(402KPH)
VEHICLE SPEED IN EXCESS OF LISTED
SPEEDS CAN CAUSE DAMAGE TO TIRES.
RIMS & HYDAAULIC COMPONENTS
FAILURE TO COMPLY MAY RESULT 1N
PERSONAL INJURY.
~ES)~ NI)~
~ MAY fltOM POWl!m
I.le.
00 NOT ATI'EWT TO
OR
N
l.te- ~ Will
~Ul'f.
0-11
4

SECTION 00 - GENERAL ff•<&FORMATION
MINIMUM HARDWARE TIGHTENING TORQUES
IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS
INCH HARDWARE AND LOCKNUTS
SAEGRAD£2 SAEGRADE5 SAEGRADE8
LOCKNUT'S
NOMINAL
UNPLAYED
PLATED UNPLATEO
PLATED UNPLAYED
PLATED GR.B GR.C NOMINAL
SIZE
or
W/ZoCr or Wtz.nCr
or
W/ZoCr w/GR5
w/GR8
SIZE
PLATED PLATED PLATED
BOLT BOLT
SILVER GOLD SILVER
GOLD SILVER
GOLD
1/4
55" (6.2)
72" (8.1)
86" (9.7) 112· (13)
121· {14) 1sr (18) 61" (6.9)
sa· (9.8) 1/4
5/16
115" (13) 149• (17)
178· (20) 229• (26)
2&r (28)
324* (37) 125• (14) 176" (20)
5116
3/a 17 (23)
22 (30) 26 (35) 34 (46) 37 (50) 48 (65)
HI (26) 26 (35)
3/8
7/16 27 (37)
35 (47)
42 (57) 54(73) 59 {80)
77 (104) 42 (57)
7116
i/2
42 (57) 54 (73) 64(87) 83 (113) 91 (123) 117 (159) 64 {88) 1/2
9/16
60 (81)
77 (104) 92 (125}
120 (163) 130 (176) 169 (229)
92 {125) 9/16
5/8
83 (112) 107 (145) 128(174) 1 160 (244) 233
127 (172) 5/8
3/4 146 {198) 189 {256}
226(306) 293 (397) 319 (432)
413 (560) 226 (306}
3/4
118
142 (193) 183 (248} 365 (495) 473 (641} 515 (698} 667 (904)
364 {494) 7/8
1 213 (289}
275 (373) 547(742) 708 (960} 773 (1048} 1000 (1356)
545 (739) 1
NOTE: Torque values shown with *are inch pounds.
IDENTIFICATION
CAP SCREWS AND CARRIAGE BOLTS
SAE GRAD£ 2 SAE GRAD£ 5 SAEGRAD£8
REGULAR NUTS SAE GRADE 5 SAE GRADE 8
HEX NUTS HEX NUTS
LOCKNUTS
A--
GRADE IDENTIFICATION
GRAD£ A NO NOTCHES
GRAD£ BONE CIRCUMFERENTIAL NOTCH
GRAD£ C TWO aRCUMFERENTIAL NOTCHES
GRADE A NO MARKS
GRAD£ B
THREE MARKS
GRAD£ C
SIX MARKS
MARKS
NEED NOT BELOCATED
ATCORNERS
GRADE A NO MARK
GRADE B LETTER B
GRADE C LETTER C
GRADE IDENTIFICATION
0-12

SECTION 00 -GENERAL INFORMATION
MINIMUM HARDWARE TIGHTENING TORQUES
IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS
METRIC HARDWARE AND LOCKNUT$
NOMINAL
CLASS5.8 CLASS8.8 CLASS10.9
SIZE
UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED
wrzner Wl'Z.nCT Wl'Z.nCT
M4
15*(1.7) 19" (2.2) 23* (2.6) 30" (3.4) 33* (3.7) 42* (4.8}
MS 51* (5.8) 67* (7.6)
79" (8.9) 102* (12) 115" (13) 150* (17)
M8
124* (14) · 159" (18) i95* (22) 248* (28) 274* (31) 354" {40)
M10
21 (28) 27 (36) 32 (43) 41 (56) 45 (61) 58 (79)
M12
36 (49)
46 (63) 55 (75) 72 (97) 79 (107) 102 (138)
M16
89 (121) 117 (158) 137 (186) 177 (240) 196 (266) 254 (344)
M20
175 (237) 226 (307) 277 (375) 358 (485)
383 (519) 495 (671)
M24
303 (411) 392 (531) 478 (648) 619 (839) 662 (897) 855 (1160)
NOTE: Torque values shown with *are inch pounds.
IDENTIFICATION
HEX CAP SCREW AND CARRIAGE BOLTS
CLASSES 5.6
AND UP
MANUFACTURER'S IDENTIFICATION
PROPERTY CLASS
HEX NUTS AND LOCKNUTS
CLASSES 05 AND UP
PROPERTY CLASS CLOCK
MARKING
LOCKNUT
CL.8
W/CL8.8
SOLT
16* (1.8}
56* (6.3)
133* (15}
22 (30)
39 (53)
97 (131)
195 (265)
338 (458)

SECTION 00 ~ GENERAL INFORMATION
0-14

SECTION 29 ... HYDROSTATIC TRANSMISSION
Chapter 1 - Hydrostatic Drive
CONTENTS
Section Description
Page
Introduction .................. , •....... , •.........•..........••........•.... 29~2
Description of Operation ...•.............................•.....•............. 29-2

SECTION 29 - HYDROSTATIC TRANSMISSION -CHAPTER 1
INTRODUCTION
This section provides information on the compo-
nents, operation, troubleshooting, and repair of the
hydrostatic transmission.
This section is divided into four chapters covering
each
of the major components of the hydrostatic
transmission as follows:
Chapter 1 provides an overview of the hydrostatic
transmission.
Chapter 2 provides information on the hydrostatic
pump.
Chapter3provides information onthe wheel motors.
Chapter 4 provides information,
on the STS
(Synchronized Transmission System).
Chapters 2 through 4 provide a description of
operation, testing
and troubleshooting, removal and
installation, and rebuilding information for that major
component.
29-2
DESCRIPTION OF OPERATION
There are two types of hydrostatictransmission that
may be installed on the machine -standard or with
the optional Synchronized Transmission System
{STS).
The STS employs wheel speed sensors connected
to a computer. The computer constantly monitors
and compares the speeds
of all four wheels. In a
standard system, if one wheel would start to slip, the
wheel speed would increase; flow would increaseto
that wheel
and decrease to the other wheels. In an
ST8-equippedsystem, the STScomputer"sees"the
increased wheel speed, sends an electrical signal to
avalveto reduce theoil flowtothatwheel. Thisslows
down the slippingwheel andmaintainsoil flow tothe
wheels with traction.
Shown in Figure 1 is the hydraulic schematic
diagram for the standard hydrostatic transmission.
Both the standard and STS hydrostatic transmis-
sions contain thefollowing major components:
• Hydraulic Tank
• Hydrostatic pump
• Drive Valve
• Range Select/Charge Filter Assembly
• Wheel Motors

,.
57h~8.7
,.,--.,.
1.....
10000231
"Y"
l
FR RH
SECTION 29 • HYDROSTATIC TRANSMISSION -CHAPTER 1
OIL COOt.ER
CASE DRAIN
•• 10MICRON
1 BAR (1~ PSI)
BY~SS
0
CASE DRAIN TEMP
GAGE
, NORMAL OP TEMP
. 4Sl·C-e,d:
(120 F· 150 Fl
f\S?L(IMGP )'
IN NEUTRAL
174UM (46 GPM)
ACJ RV3
INFWO
OR REV
IWlBRAKES
t LOCKE!D
HYDRAUl.'CTANK
23H.5L
(83GAll
~. TESTED IN
NEUTRAL ONLY
if,40,' l.~~RH
. .\
p
err-_B __ F+-
.25t ~_Y:l
AR RANGE SELECT/
CHARGE FILTER
AF
AP G1
0
(Hl•BAA
fQ.(l()()C PSll
, G.-GE
FORWARD ONLY
29-3
l
't6H>'
i 25.1/
\,.
RANGE SVF SVfl
L OFF OFF
M
ON OFF
H ON ON
NOTE:
WHLMOTOR
LEAKAGE FROM
ALL4MOTORS
COMBINECIS
u,-4.?UM
(.S • L25 GPM)
TO
RRAKF VALVE

SECTION 29 • HYDROSTATIC TRANSMISSION -CHAPTER 1
Hydraulic Tank
A hydraul!c tank with a capacity of 238.5 Liters (63
gallons) is located between the frame rails underthe
rear
of the cab. Housed within the tank are three
100•mesh strainers. These strainers are located on
the three outlet ports at the front
of the tank.
Openings on the top of the tank allow access to the
interior for cleaning the tank.
A sight gauge on the rear of the tank indicates the
level of oil in the tank and is marked for low {add oil),
normalcold, andnormal
hot At thenormalcoldlevel,
thetank contains 189 Liters (50 gallons) of hydraulic
oil.
Hydrostatic Pump
The hydrostatic pump is located behind the engine,
bolted to the rear of the engine. This pump is driven
directly
by the engine turning at a maximum of 2500
RPM. The hydrostatic pump is an Eaton 64-Series
consisting of a charge pump and a high-pressure
pump. Internal valves limit the charge pressure and
the differential pressure between the output ports.
Drive Valve
The drive valve,
1, is centered between the frame
rails just forward of the rear axle.
29-4
2
3
4