Case 446 User manual

446 Tractor
SIN 9742953 and after
Operator's Manual No. 9-6422

IF THIS MACHINE IS USED BY AN EMPLOYEE OR IS
LOANED OR RENTED, MAKE ABSOLUTELY CERTAIN
THAT THE OPERATOR(S), PRIOR TO OPERATING:
1. fS INSTRUCTED IN SAFE AND PROPER USE.
2. REVfEWS AND UNDERSTANDS THE MANUAL(S)
PERTAINING TO THE MACHINE.
751253
BEFORE STARTING ENGINE
STUDY OPERATOR'S MANUAL SAFETY MESSAGES
READ ALL SAFETY SIGNS ON MACHINE
CLEAR THE AREA OF OTHER PERSONS
LEARN & PRACTICE SAFE USE OF
CONTROLS BEFORE OPERATING
IT IS YOUR RESI?ONSISIUTY TO UNDERSTAND AND FOLLOW MANUFACTURER'S INSTRUCTIONS
ON MACHINE OPERATION, SERVICE , AND TO OBSERVE PERTINENT LAWS ANO REGULAT.rON5 .
OPERATOR AND SERVICE MANUALS, MAY BE OBTAINED FROM YOUR EQUIPMENT DEALER.

TABLE OF CONTENTS
SAFETY RULES .. . ........ . . .. ........... ... ............ . , . .. . . . . . I - X
INTRODUCTION . . . . .. ... .... .. . . ... ' .' . .. . ....... ... . . ...... . . . ... .
SERIAL NUMBER, . . . . , ... . .... , . .......... , ........ .. .. , , .... ... . . 3
GENERAL SPECiFiCATIONS ....... . . . . .... ... . ... , ........ .. ....... . 4
Hydraulic System ...... .... ........ .. ......... . ..... . . . .. .. ...... . 4
Electrical System .. .. . . .. . . . ..... .. .. . . . ........ .. ....... . . .. .. . . . 4
Brake
....... . . .. . .......... . . .. ..... . ...... . . ............ .. ... . 4
Transaxle ................. . .............. .. ........... .. . . ..... '. 4
Speed Range . ......... . . . ............. . . .. . . ........ , . .. ...... . . 4
Wheels and Tires ...... , . ....... . .... . ..... . . . .... . . .. . . ......... . 4
ENGINE SPECiFiCATIONS .. . ... . . .. . ... . . .... ..... ........ . .. , . ... . 5
OVERALL MEASUREMENTS .... .. . .... . . .. ......... .. . . . ... .. . . . .. . 6
LUBRICATION ...... . .. ........ . .. .... . . ... . ... .. . .. ... ...... . . . . . 7
Engine Lu brication . .
.. ... ...... . . .. ....... .. , .... ..... . . . . ..... . . 7
Lubrication Chart
....... . .. . ....... .. ...... . . . . . ....... . , ... . . .. . 8 - 9
FUELSPECIFICATIONS .. . . . .. . ......... .. ......... ... . ... . ... . . ... . 10-11
OPERATING INSTRUCTIONS ... . . .. ............ .. ...... . . ... ... ... . . 12 - 27
Operating Contr ols & Instruments ... .. .... . . ... . .. ....... . ... . ...... . 12 -17
Pre-Starting Check List
.............. , .. . ...... . ..... .... . . ....... . 18 -19
Starting Procedure
.... . .... . . . ...... . . . ......... . . , ........ . .... . . 20 -
21
Stopping the Engine. .
.... . . . . ... .. . . ... . .......... . ....... . . ... .. . 22
Operating Procedure. . ........ .. ........ ... . . . .. . .. ... ..... . ..... . .
23 - 27
PREVENTIVE MAINTENANCE ....... . " . ............ . ...... . . . ...... 28 - 40
Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 29 - 30
Air Cleaner ... .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 35 - 40
Storage Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 37 - 38
Carburetor Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Steering Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Toe-In Adjustments
... . . ......... . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Headlights
.. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Spark Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Jump Start With Booster Battery
.. . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . 39
Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
ATTACHMENTS . ... . ... . . ... . . ..... . .. .... . ... . . ... . .... .. ..... . .. 41

SAFETY MESSAGES
The first twenty-three safety messages which follow are provided by the American Na-
tional Standards Institute * (ANSI). Safety rules to supplement those provided by ANSI
also appear on the following pages .
Study these rules carefully before starting and operating your Case Lawn and Garden
Tractor.
* Rule Number 24, which does not apply to this product, has been omitted.
A. CAUTION: Know the controls and how to stop quickly. READ
.. THE OWNER'S MANUAL .
A. CAUTION: Do not allow children to operate the vehicle. Do not
.. allow adults to operate it without proper instruction.
A. CAUTION: Do not carry passengers. Keep children and pets a
.. safe distance away.
A. CAUTION: Clear the work area of objects which might be picked
.. up and thrown.
A. CAUTION: Disengage all attachment clutches and shift Into neu-
.. tral before attempting to start the engine (motor).
A. CAUTION: Disengage power to attachment(s) and stop the en-
.. gine (motor) before leaving the operator's position.

II
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M
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uaw
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e
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A CAUTION:
When using any attachments, never direct discharge
of material toward bystanders nor allow anyone near the vehicle
while in operation.
A CAUTION: Keep the vehicle and attachments in good operating
.. condition, and keep safety devices in place.
A CAUTION: Keep all nuts, bolts, and screws tight to be sure the
.. equipment IS in safe working condition.
A CAUTION: Never
store the equipment with gasoline in the tank
inside a budding where fumes may reach an open flame or spark. AI·
low the engine to cool before storing in any enclosure.
A CAUTION: To reduce fire hazard, keep the engine free of grass,
.. leaves, or excessive grease.
III

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-aJ(j 011eaS 5, 10)PJado alii WOll SIOJILJOJ <JleJado AILJO NOLinVJ V
-aul6ua a41 paads ..
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a6ewep a41 pue 'palqo u61alol e 5ul)tIJ1S Jalje a5ewep 101 papadsul
pue paddols aq Plnolls Sluaw4:Jene PU!? al:J14all aLii :NOlinVJ

h CAUTION: Do not wear loose clothing which may catch in moving
.. parts.
A CAUTION, Do nOI ,mok. wh.n wo,k;ng n .. , f •• 1.
h CAUTION: Drive at a speed slow enough to Insure safety and
.. complete control at all times.
A CAUTION: Highway travel should be avoided.
If necessary, use
SMV safety
emblem and lights for adequate warning to the
operators of other vehicles. Check local government regulations.
A CAUTION: Place
the transmission 10 neutral, set the parking brake
and
stop the engme before standing between the tractor and
attachment when hitching.
h CAUTION. If necessary to move tractor on a trailer, always back up
.. onto the trailer and drive off of trailer.
v

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.J01!leH mol. 6u!leJado aJolaq lenuew S!41 U! "
..uOl1eJado ap!sII!H..
palm UO!l!laS a41 U! ua,,!6 SUO!l!lnJlSu! a41 MOl
-101 pue pea~ jUO!leJado JadoJdw! P!O"V 'snoJa6uep aq Ue:J sadolS
pue sap!sII!4 uo J01!leJ1 mol. 10 uO!leJado JadoJdwl : ~NIN~VM

A
DANGER . Batteries produce explosive charges. Keep sparks, flame
and cigarettes away . Ventilate when charging or uSing in enclosed
space. Always shield eyes when working near batteries .
A
CAUTION: Never wear rings or metal watch bands when working
with the tractor electrical system or battery as you may ground a
live
circuit.
IMPORTANT: Always install new decals whenever the old decals
are destroyed, lost, painted over or illegible. When individual parts
are replaced that have decals attached, be sure to install a new decal
with the new part. Replacement decals are available from your Case
dealer.
VII

HI LLSIDE (SLOPE) OPERATION
A
WARNING: Improper operation of your tractor on hillsides and
slopes can
be dangerous. Avoid improper operation! Read and fol·
low the instructions given in the section titled "Hillside Operation"
in this manual before operating your tractor.
Avoid operating tractor on hillsides and slopes. To minimize the possibility of acci-
dents while operating
on hills and/or rough terrain, obey a combination of rules, prac-
tices and good
common sense .
These include:
1. Reading, understanding, and obeying all written safety messages appearing on decals
on the machine and in operator's manuals.
2. Learning from your operator's manual and carefully from EXPERIENCE how to op-
erate
your tractor correctly . Know your tractor's limitations .
3.
Knowing the terrain on which you are operating your tractor. There are terrain condi-
tions
on which your tractor cannot be operated!
4. Learning
to expect changes in operating conditions. Adding or removing attachments
or weight to your tractor will make your tractor perform differently. Rain, snow,
loose gravel,
wet grass, etc., change the tractive conditions of the terrain requiring
changes in
your operating technique or not to operate on that terrain.
The
following paragraphs will cover these practices one at a time. Read and study
them. The examples provided are not all inclusive but will give you a firm understanding
of the requirements for avoiding accidents while operating your tractor.
Case Lawn and Garden Tractors are designed and built to comply with the Voluntary
Standard ANSI B71.1 - 1972 and B71.1 a . 1974 (American National Standards Institute).
The diagram depicts the maximum
angles that the stationary tractor, less
mounted equipment, was subjected to
without tipping, measured on a perfect·
Iy flat, smooth, and hard surface. This
illustration does not recommend safe operating limits as the slope, type of terrain and all
applicable factors
as discussed in this manual must be taken into consideration by any
person whenever operating the
tractor.
THE OPERATOR IS THE SOLE JUDGE AS TO THE DEGREE OF SLOPE ON
WHICH THIS TRACTOR CAN BE SAFELY OPERATED . IF IN DOUBT THAT THIS
TRACTOR CAN BE SAFELY OPERATED ON A PARTICULAR SLOPE, DO NOT OP·
ERATE ON THAT SLOPE! COMMON SENSE MUST PREVAI L.
VIII

Read, Understand, Obey:
Safety messages are found on the tractor and in the operator's manuals . These must be
understood by the tractor oRerator to be of value. Be sure that these messages are studied
before starting and/or operating the tractor by an operator not familar with th is particu-
lar
tractor.
Learn to OJ:!erate:
Learn
your tractors controls from decals on the tractor and from instructions in the
operator's manual. Practice how to properly manipulate these controls. Practice must be
done in a flat area, clear of obstacles and bystanders. Learn your tractors operating
characteristics and limitations. These include:
a.
amount of engine power available
b.
engine governor response
c.
tractive ability
d. steering
characteristics
e. braking
characteristics
f. movement of travel lever
g.
forward and reverse ground speeds
h.
speed of attachment lift
i. and others
Attempting any operation which approaches or exceeds the tractor's limitation is risk-
ing an
accident.
Know the Terrain:
Know the terrain on which you are working.' Find hidden obstacles by walking
through and inspecting the area prior to operating your tractor on it. Mark obstacles,
such as, rocks, ruts or holes with a 6 ft long pole and red flag and stay well clear of these
obstacles when operating.
Operate your tractor at a ground speed slow enough to insure complete control at all
times.
Place
the transmission in low range and regulate the travel control lever slowly and
smoothly to maintain this safe speed .
Always drive
in a forward direction when proceeding downhill. Never drive up a hill. If
necessary,
back up a hill to the desired position. Always back up loading ramps and tilt
bed trailers. If necessary to turn while on a hill, always turn downward.
IX

Your judgement, based oli operating experience is the final word in decidi ng if you
should negotiate any given hill or ·slope. If you are in doubt about safety - STAY OFF
THE SLOPE .
Unde r no circumstances should an inexper i enced operator attempt to use your trac-
tor on slopes or hillsides.
You may encounter some terrain on which your tractor cannot be operated even if a
different piece of equipment has operated there in the past.
Learn
to Compensate for Changes in ORerating Conditions :
Adding
or removing attachments or ballast (such as wheel weights or fluid) change the
weight and weight distribution of your tractor and, therefore, change your tractors opera-
ting characteristics.
Be alert to these changes. Practice, operating the tractor after each change has been
made.
Adding an attachment (weight) to the rear of the tractor reduces the weight on the
front axle. Adding an attachment (weight) to the front of the tractor reduces weight on
the rear of the tractor. You must add counterweight to the fron t if a rear mounted at-
tachment is installed. You must add counterweight to the rear if a front mounted at -
tachment is installed.
Tractive conditions will vary with weather and terrain and equipment.
Areas wet with dew, rain or snow will be more slippery than when dry. Areas covered
with loose gravel are more slippery than firm dry ground . Greater stopping distances are
required in these slippery areas.
Spinning rear wheels tend to move the tr actor sideways . The addition of tire chains
will provide more traction to the rear wheels in the forward -reverse direction but less sta-
bility in the sideways direction. Chains will cause more abrupt starting and stopping .
The final
word in safe tractor operation rests on your judgement .
If in
doubt of your safety - STAY OFF THE SLOPE .
x

TO THE PURCHASER OF A CASE TRACTOR
The care you give your ne w Ca se Tractor will greatly determine the satisfaction and
service life you will obtain from It. Use thi s manual as your guide. By observing the in·
structlon s and suggestions in this manual, your Case Tractor will serve you well for many
years.
As an Authorized Case Dealer, we stock Genuine Case Part s, which are manufactured
wi th the same precision and skills as the or iginal equipment. Our factory trained s taff is
kept well informed on the best method s of servicing Case equipment and is ready and
able to help you .
Should you require additional aid or information, contact us.
J/aa~~ooeg~
NOTICE
Laws of some states or provinces may require that thi s unit be equipped wi th a SPARK
ARRESTOR OR SPARK ARRESTING MUFFLER . The State of California, as an
example, is one state which has such regulations for agricultural and forestry application s,
plus a regulation for construction applications in forest·covered, brush-covered, or
grass-covered lands.
Typically such la~\ls and regulations require spark arresting devices to be maintained in
good working order and typically to be attached to the exhaust system of naturally
aspirated engines (engines without a turbo charger)
CANADIAN RADIO INTERFERENCE REGULATIONS
The Canadian Government, under authority granted by the Radio Act, has pro-
mulgated regulations covering this gasoline powered Case Compact Tractor if im-
ported into Canada on or after September 1, 1976.
The spark plug(s) and spark plug wire(s) in this machine when replaced must be resistor
type,
The certification label applied to the engine must not be removed or obliterated.
11-78-SL-4000 U.S, PRICE $1.05
PRINTED IN U.S.A.
. 1 -

FIGURE 1. Left Hand View of Case 446 Compact Tractor
FIGURE 2. Right Hand View of Case 446 Compact Tractor
·2·

SERIAL NUMBER
When ordering parts from your Authorized Case Dealer and in all contacts or cor·
respondence
with your dealer relative to the tractor.always specify the Product Identifi·
cation, Model and Engine Numbers of your tractor.
The
Tractor Model and Product Identification Numbers are stamped on the number
plate located on the
instrument panel, Figure 3. The Engine, Model, Serial and Engine
Specification Numbers
are stamped on a plate fastened to the top left hand side of blower
housing, Figure 4.
TRACTOR MODEL ENGINE MODEL, SERIAL AND
AND SERIAL NUMBER SPECIFICATION NUMBER
FIGURE 3 FrGURE· .,f
NOTE: The terms "Right Hand", "Left Hand", "Front" and "Rear"
whenever used in this manual apply to the tractor when facing in the
direction the tractor will move in forward operation.
For reference,
fill in the Product Identification Number, Model Number and Engine
Numbers
of your tractor in the spaces provided below:
Tractor Model Number _ ....... 44;...;.;;6 ....... _________ _
Tractor Product
Identification Number
B43M/GAO 16
Engine Model Number
Engine Serial Number
Engine Specification Number
This Manual applies to the following tractor:
Model Product Identification Number
9742953 and After
446
· 3·

446
GENERAL SPECIFICATIONS
HYDRAULIC SYSTEM
Independent 5 quart (4.7 I) reservoir, pump, control valve, hydraulic motor and heat ex-
changer. Pump delivers
approximately 8 gallons per minute (36 limin) at 3600 RPM. Max i-
mum drive system operating pressure (relief valve) setting: 2000 psi . (13 800 kPa)
Maximum attachment lift system operating pressure setting: 575 psi. (3970 kPa) .
ELECTRICAL SYSTEM
Type of System 12 Volt, Negative Ground
Battery Case, 24 Ampere Hour at 20 Hour Rate
Headlights 12
Volt
Starter
12 Volt, Bendix Drive
Flywheel
Alternator
12
Volt, 15 Amp
BRAKE
Type
Double acting, self energizing, mechani-
cal
contracting band, with the drum
shaft driven from transmission dif -
ferential. Includes parking lock.
TRANSAXLE
Type . . ...
......... . .. . . ... Hydraulic Driven, Dual Gear Range
Differential
. . . . . . . . . . . . . . Automotive Type Bevel Gear
Oil Capacity
.. .......... . ... .... 3 Quarts (2.8 II
SPEED RANGE
FORWARD
REVERSE
Low o to 3.2 MPH (5. 15 km/h) o to 3.2 MPH (5.15 km/h)
High o to 7.8 MPH (12.55 km/h)
o to 7.8 MPH (12.55 km/h)
WHEELS AND TIRES
Tire Size
PLY TYPE Recommended Pressure
PSI (kilopascal) Max. Pressure
PSI
(kilopascal)
6.50-8 2
Front
High
Flotation
8 (55) 14 (97)
8.00-16 2 Rear
High
.Flotation
8 (55)
14
(96)
- 4 -

ENGINE SPECIFICATIONS
GENERAL
446
Type
ONAN
Model
B43M/GA016
Cycle . 4
Cylinders 2
.' Cylinder Bore 3.25 in. (82.5
mm)
Stroke ..
2·5/8 in. (66.6 mm)
Piston
Displacement.
43.3 eu. in. (713 ee)
Horsepower 16
@3600 RPM
Compression Ratio . 7
to 1
Full Load Speed
3500 RPM
No load Speed
3600 RPM
Idle Speed . . .
1200 RPM
Valve Clearance Cold
(I ntake) . .007
.. 009 in (0.17 mm· 0.22 mm)
Valve Clearance Cold (Exhaust) ..
.012· .014 in. (0. 30 mm· 0.35 mm)
PISTON AND CONNECTING ROD
Piston
Compression Rings
Oil Rings
Connecting Rod
..
FUEL SYSTEM
Filter Screen . . . .
Fuel Tank Capacity
IGNITION SYSTEM
Breaker Point Gap
Ignition Timing
Spark Plug .... . ... ... . . . .. . .. .
Thread
...... . .. . .. . .... . .
Gap
.. . .. . . ...... .. .
COOLI NG SYSTEM
Flywheel Blower ...... .. .. .. . . .. .
Aluminum
2
1
Aluminum
In tank outlet fitting
3 Gallons (11.4 I)
.021 in. (0.53 mm)
21°·
BTDC
Prestolite 14 L4 or equivalent
Prestolite
14Rl4 or equivalent
in Canada
14MM
.025" (0.64 mm)
Forced air
with baffles directing air
around finned cylinder and head area .
· 5·

OVERALL MEASUREMENTS
c
D
FIGURE 5
446
A Overall Length
70" (1780 mm)
B Wheel
Base
46" (1170 mm)
C Overall Height
43-1/2" (1110mm)
D Hood Height -Rear
38-1/2" (980 mm)
E
Minimum Ground
11" (280 mm)
Clearance at Gear
Case
Rear Wheel Tread 31-112" (800
mm)
Front Wheel Tread
33-1/2" (850 mm)
Overall Width
41" (1050 mm)
Shipping Weight 770
Ibs. (350 kg.)
- 6-

. LUBRICATION
ENGINE LUBRICATION
SE LECTION OF 01 L
It is extremely important that you select and use a detergent type, high quality, SE or
CC, API Service Classification Oil such as Case HOM.
OIL SAE VISCOSITY RATING
/
SAE 30 or 20W-40 . · Air Temperatures 30
0 F
(_1
0
C) and Above
SAE lOW-30 . · Air Temperatures 00 F (-180 C) to 30
0 F
(_,0 C)
SAE 5W-20.
· Air Temperatures 00 F (_18
0
C) or Below
OIL CHANGE
Drain and refill the crankcase at least every 25ihours of operation.
If possible, run engine just prior to changing oil-- the oil will flow more freely and carry
away a greater amount of contaminan .t when hot.
If the engine service is severe - (frequent stopping and starting, high or low operating
temperature) -
the crankcase should be drained more often to prevent the formation of
sludge or harmful deposits in the engine_
A CAUTION: Disengage power to attachment(s) and stop the en-
.. gine (motor) before making any repairs or adjustments_
IMPORTANT
,. When the crankcase is drained, refill with 4 measured pints (1.9 I) of oil.
2_Operate the engine for a few minutes, allow sufficient time for the oil to run down off
the engine parts, then check the oil level with the dipstick.
3. This will prevent overfilling or underfilling the crankcase, either of which can be
detrimental to the engine service life and will give you false oil consumption records.
- 7 -