Craftsman 486.244021 User manual

)SEARS
owners
manual
Model No.
486.244021
48""
DOZER BLADE
CAUTION:
Read Rules for
Safe Operation
and Instructions
Carefully
48 "'_DOZER B
•Assembly
•Operation
•Maintenance
•Repair Parts
Sears, Roebuck and Co., Chicago, Ill 60684 U.S.A.
PRINTED IN U.S.A.

RULES FOR SAFE OPERATIONS
Remember, any power equipment can cause injury if operated improperly or if the user does not understand how to operate
the equipment.
LOOK FOR THIS SYMBOL TO POINT OUT
IMPORTANT SAFETY PRECAUTIONS. IT
MEANS--- ATTENT:fONf BECOME ALERT!
YOUR SAFETY IS INVOLVED.
Exercise caution at all times, when using power equipment.
1. Read the tractor and dozer blade owners manuals and know how to operate your tractor, before using tractor with the
dozer blade attachment.
2. Never operate tractor and dozer blade without wearing proper clothing suited to weather conditions and operation of
controls.
3. Never allow children to operate tractor and dozer blade, and do not allow adults to operate without proper instructions.
4. Always begin with transmission in first (low) gear and engine at tow speed, and gradually increase speed as required.
48" DOZER BLADE CARTON CONTENTS
(Also See Page 3)
4
13
CARTON CONTENTS
REF. QTY. DESCRIPTION RER QTY. DESCRIPTION
NO. NO.
1 (1) Blade Asssembly 8 (2) Lift Pivot Plate
2(2) Channel/Pivot Plate Assembly 9 (1) Support Bracket
3 (1) Lift Assembly 10 (1) Handle Assembly w/grip
4(1) Guide Bracket Assembly 11 (2) Angle Lock Bars
5 (I) Blade. Pivot Bracket 12 (1) Grip Assembly
6 (2) Spring Assembly 13 (1) Control Cable Assembly
7 (2) Hitch Plate (1) Parts Package (Not Shown)
2

A B C D_ jE
sAC
_,_R _ _R _ K
FIGURE 1
E
z
1/4 x 5/8";
1/4"'
LOCK NUT 1/4 x 1-114"'
5/16" JAM NUT
L
*l
5/16 x I-1/2"'
5/16" LOCK NUT
1f2 x 2-3/4"
FULL SIZE HARDWARE REFERENCE CHART
CONTENTS OF PARTS PACKAGE (Figure 1)
IREF.I QTY.J DESCRIPTION
IAI _1)istop Angle ..........." "
IB I (2) j Keeper Plate
} C I (1) ILift Arm Link ,
1 D I (1) ISpring Pin 1/4 x 1'
I E I (1} tCable Mount Bracket
I F I (t)INylon tie
[GJ(2)[Cable Fitting, End
IHI(1) IAngle Lock Spring
IIt(1))Shoulder Bolt
IJI (1) tHex Whizlock Nut 3/8-16 Thread
IKI(14)IHairpin Cotter 1/8" ,,
ILI(1) tHex Bott 5/16-18 x t-1/2
tMI(1) IHex Lock Nut 5/16-18 Thread
I N i (2) IHex Bolt 1/2-13 x 2-3/4
I O I (2) ILock Washer 1/2"
[ P I (2) _Hex Nut 1/2-13 Thread ,,
I Q ! (2) ICarriage Bolt 3/8,_16 x 1-1/4
i R I (11) ILock Washer 3/8
I S I (11) IlHex Lock Nut 3t8-!6 Thread
T t (21 _Hex Bolt 3/8-16,x 1-1/2'
t U / _(2) tFIat Washer 3/8 Std.
t V I (1) IPivot Bushing (short) ,
I W t (1) IHex Bolt 1/4-20 x 1-1/4'
I X I (1)/Spacer (long)
/ Y [ (3) [Hex Lock Nut 1/4-20 Thread
IZ/ (1) IHex Bolt 114-20 x 5!8'
/AA | (7) /Hex Bolt 3/8-16 x 1
I AB / (4) IHex Jam Nut 5/16-24 Thread
/AC | (2) /Clevis Pin 1/2 x !-t/4"
IAD / (6) IWasher 17/32 x 1-1/2 x 10 Ga.
AE (1) Handle Guide
CARRIAGE
3f8 x I"
318 x 1-1/4"
318" LOCK
318" LOCK NUT
3/8 x 1-1/2""
3t8"' STD
1t2" LOCK
_._P
1/2" NUT
3t8" SHOULDER
3t8 '° WHIZLOCK NUT
AD
O
17/32 x 1-1f2"'
u i u

ASSEMBLY INSTRUCTIONS
TOOLS REQUIRED FOR ASSEMBLY
(1) 7/16" Open End or Box Wrench
(1) 1/2" Open End or Box Wrench
(1) 9/16" Open End or Box Wrench
(1) 3/4" Open End or Box Wrench
(1) Adjustable Wrench
(1) Hammer
Refer to carton contents figure on page 2 and figure
1 on page 3 for parts and'hardware needed to
assemble dozer blade,
RIGHT HAND (R.H,} AND LEFT HAND
(LH.) ARE DETERMINED FROM
OPERATOR'S POSITION WHILE
SEATED ON TRACTOR.
1, Assemble curved end of angle lock spring into
small hole in washer as shown in figure 2,
MOUNT
ROD
e
ANGLE LOCK SPRING
CHANNEL/PIVOT
PLATE ASSEMBLY
FIGURE 2
,Assemble the two-angle lock bars together as
shown in figure 3, using one 3/8" x 1-1/4"
carriage bolt down through the top holes with
a 3/8" lock washer and a 3/8" hex nut
underneath. Do not tighten at this time.
I
e'*'-"-_ 3/8" HEX NUT I3/8" x1-1t4"
CARRIAGE BOLT 3/8" LOCK. I
(TOP_ WASHER*_
ANGLE
LOCK
FRONT -_
LOCK BAR
SLOT
SPRING PiN
HOLE
CHANNEL/PIVOT
PLATE ASSEMBLY
ANGLE LOCK SPRING
FIGURE 3
,Assemble the offset end of angle lock spring into
small holes in angle lock bars as shown in figure
3. Slide lock bars through lock bar slot until
spring pin hole is aligned with bracket on back
side. See figure 4, Using a hammer drive 1/4"
x 1" spring pin into lock bars until flush wit_
bracket. See figure 4. Tighten nut in angle loc¢_
bars which was left loose in step 2,.--
ANGLE
LOCKe_ BARS_,
FIGURE 4
NOTE
Lock bars should pivot freely and
when pulled all the way back the
channellpivot plate assembly should
be unlocked and free to pivot to right
or left position notches.

.Assemble angle stop to top of channel using one
1/4" x 5/8" hex bolt down through left hand
hole, and one 1/4" hex lock nut under channel.
See figure 5. Do not tighten at this time.
114"' HEX LOCK NUT CHANNEL!PIVOT
PLATE ASSEMBLY
I/4"x 5/8" HEX
BOLT
ANGLE STOP
FIGURE 5
5.
3/8" x 1-1t4"
CARRIAGE BOLT
\
CABLE MOUNT
BRACKET
Assemble 3/8" x 1-l/4" carriage bolt through
square hole in cable mount bracket and through
square hole in lock bars. See figures 6 and 7.
Hold cable mount bracket in position as shown
in figure 7 and secure with 3/8" lock wa'sher
and 3/8" hex nut. ,1
f8" HEX NUT
3tB" LOCK WASHER
FIGURE 6
6. Assemble one 5/16-24" hex nut onto threaded
end of control cable approximately 3/4"' from
end. Assemble threaded cable end through
round hole in cable mount bracket and secure
with another 5/16-24" hex nut. See figure 7.
MOUNT
•BRACKET
CABLE END
BALL EN[
FIGURE 7
7. Assemble ball end of cable through round hote
in cable end fitting and into slo,t of fitting. See
figures 7 and 8.
1/4" xI-1/4'"
HEX BOLT
CABLE END
LONG FITTING
ANGLE STOF
PUSH CHANNEL
1t4" HEX LOCK NUT
FIGURE 8
8. Assemble !/4" x 1-1/4" hex bolt down through
cable end fitting, through tong spacer, angle
stop, (right hand hole) and through channel. See
figure 8. Secure with 1/4" hex lock nut and
tighten the other !/4"' hex lock nut, which was
left loose in step 4. NOTE: Keep cable and
fitting in alignment when tightening nuts.
ASSEMBLY OF DOZER BLADE
TO TRACTOR
Remove mower or any other attachment you may
have mounted to your tractor. Mark all loose parts
and save for re-assembly, Refer to tractor owners
manual for removal of mower/attachment.
1. Assemble. hitch plates to outside of tractor
frame and secure with two 3/8" x 1" hex bolts,
two 3/8" lock washers, and two 3/8" hex nuts
on each side. See figure 9,
318°' x 1"'
HEX BOLT
J
FIGURE 9
5

2_ Assemble channel assembly pivot shaft under
front of tractor and into hitch plates as shown
in figure 10. Assemble keeper plates over ends
of shaft (with lip under hitch plates) and secure
by placing hairpin cotters through small holes-
.outside keeper plates near each end of shaft.
CHANNEL ASS'Y. -_-_ HITCH _r
PIVOT SHAFT __ PLATES _J
KEEPER
HAIRPIN COTTER
MOUNT
FIGURE 10
3. Hoid blade head upright and guide one end of
mount rod into hole near bottom of blade mount
gusset. See figures 10 & !1. Secure with a hair-
pin cotter. Slide other end of mount rod
into other blade mount gusset hole and secure
with hairpin cotter.
SPRING
ADJUSTMENT BOLTS
BLADE
CAP
HEX NUT
CHANNEL
ASS'Y.
MOUNT
GUSSET/
HAIRPIN COTTER
[ROD
SPRING
MOUNT EARS
.FIGURE 11
4. Connect curved end of spring assemblies into
spring mount ears. See figure 1t. Remove plastic
cap and one 3/8"hex nut from end of each
spring assembly. Hold blade back against stop
bolts and assemble spring adjustment bolts up
through bar. Re-assemble two 3/8" hex nuts,
removed earlier, onto adjustment bolts on top
side of bar. "13ght6n both spring adjustment nuts
approximately 1" down from end of bolt threads,
see figure 11,to provide tension of blade against
stop bolts.
.
.
Re-assemble plastic caps on top ends of
spring adjustment bolts.
NOTE
SEE ADJUSTMENT SECTION ON
PAGE 10 FOR SPRING TENSION.
Assemble blade pivot bracket on to top right
hand side of channel!pivot assembly. See figure
12. Assemble two 3/8" x 1" hex bolts down
through bracket and plate and secure with two
3/8" lock washers and 3/8" hex nuts
underneath.
CHANNEL/
PIVOT
ASS'Y,
BLADE
PIVOT
BRACKET
318" x 1"
HEX BOLT
3/8" HEX NUT AND LOCI{ WASHER....
FIGURE 12
,Assemble the lift pivot plate under the left
hand foot rest of the tractor and over the
suspension bracket mount pin. See figure 13.
Secure with one 17/32" x 1-1/2" flat washer and
one hairpin cotter. See figure 14. Do not
assemble the lift pivot plate under the right hand
foot rest at this time.
LIFT
PIVOT PLATE LEFT HAND SIDE VIEW
FIGURE 13

""---- FRONT (LH.) SIDE VIEW
HAIR PIN
COTTER
17/32" x 1-1
WASHER
-I/ LIFT¸
_PIVOT PLATE
// /I"_-'- (L.H.) LIFT
LtNK ROD
PIVOT HOLE
FIGURE 14
,Pre-assemble front lift arm link to long arm on lift
assembly as shown {n figure 15. Assemble one
3/8" x 1-!/2" hex bolt through one 3/8" flat
washer, through pivot bushing and through large
hole in lift arm link near angle end. Secure with
one 3/8" lock washer and one 3/8" hex nut, See
figure 15. NOTE: Lift arm link must pivot freely.
3f8" HEX PIVOT
BUSHING
3/8"" LOCK WASHER
LONG ARM 3/8"
10. Assemble lift arm link over channel rod and
insert pivot shaft end (from R.H. side of
tractor) into hole in L.H, lift pivot plate- See
figure 17.
TRACTOR (R.H.) SIDE VIEW FRONT'-"-_
(R.H.) SUSPENSION
MOUNT BRACKET
PIN _RM LINK
(LH.) LIFT i
PIVOT PLATE CHANNEL ROD
.,_
/ / PIVOT SHAFT END
FIGURE 17
11. Assemble right hand Iift pivot plate over right
hand end of tift assembly pivot shaft and secure
to right hand suspension bracket mount pin with
one 17/32" x 1-1/2" washer and one hair pin
cotter. See figures 17 and 18.
LIFT ASSEMBLY HEX BOLT
FIGURE 15
9. Relieve spring tension on lift lever {see
figure 16 and note below) !oosening hex jam nut
and unscrewing adjustment bo{t counter-
clockwise. NOTE
Tractor lift lever must be positioned all
the way back and locked in position.
BACK VIEW (TRACTOR)
NUT
_TTACHMENT j
0LIFT SPRING w
FIGURE 16
7
(R.H.) SIDE VIEW _FRONT----.-
(R.H.) LINK ROD \_/-" "
_U
__r"'_ HAIRpl_rT ERs
'__--_17132 x1-1/2 (R.H.) LIFT
WASHERS PIVOT PLATE
FIGURE 18
12. Move tractor lift lever to forward position.
Assemble one 1/2" x 1-1/4" clevis pin from
inside through one 17/32" x 1-1/2" washer,
through right hand link rod, and through lift
assembly arm. See figure 18. NOTE: Link rods
must be positioned inside of lift assembly arms.
Assemble 17/32" x1-1/2" washer over clevis
pin on outside and secure with a hairpin cotter,
Secure lift assembly to right hand lift pivot plate
with a hairpin cotter through hole in lift
assembly pivot shaft on outside, See figures 18
and 19. Repeat this step on left hand side-

13, Secure lift arm link to channel rod with one
hairpin cotter. See figure t9.
_..__\LIFT ARM LINK
• -IANNEL
(R.H.) LIFT PIVOT ROD:_
ASSEMBLY
HAIRPIN COTTERS pIVOT SHAFT
FIGURE 19
14. Assemble support bracket onto right hand side
of tractor (between muffler guard and tractor
frame if so equipped) using one 3/8" x 1" and
one 3/8" x 1-1/2" hex bolt inside and secure
with one flat washer, two 3/8" lock washers,
and two 3/8" hex nuts on outside. See figure
20,
iHAIR PIN
COTTER
LIFT
3t8" x
HEX BOLT
FLAT
FIGURE 20
15, Assemble handle guide (with loop outside}
at top of support bracket and secure with one
hairpin cotter inside-See figures 20 and 21.
HANDLE
ASS'Y.
3,,-1 I--
CONTROL CABLE END
HAIRPIN HANDLE
COTTER GUIDE
FIGURE 21
16. Assemble handle assembly down through
handle guide as shown in figure 21, Secure
lower end +ofhandle to top side,of blade pivot
bracket with special shoulder bolt (on top) and
318 '" hex whizlock nut underneath. See figure
22.
17. Assemble one 5/16-24" hex nut onto threaded
end of control cable approximately 314" from
end. Assemble threaded end of cable up through
cable mount ear and secure with second
5/16-24" hex nut. See figure 21.
18. Assemble handle grip on upper end of handle
assembly if not already pre-assembled. See
figure 21.l !
EXHAUST
PIPE BLADE
HANDLE PIVOT
TUBE BRACKET
SPECIAL
SHOULDER
BOLT
3/8" HEX
;K NUT
FIGURE 22
19. Wrap plastic tie around handle tube and
cable, (see figure 22), assembling e_d of tie
through lock. Pull plastic tie tight to retain cable
to handle tube just above exhaust pipe. Cut off
extra plastic end.
20. Assemble grip assembly to handte assembly
using one 5/16" x 1-1/2" hex bolt and one 5/16"
hex lock nut, See figure 23. NOTE: Do not over
tighten lock nut, grip assembly must pivot freely.
5/16" x 1-1/2" CABLE END_-_
REX BOLT FITTING 114" REX
LOCK NUT
/
GRIP
ASSEMBLY
CABLE
ASSEMBLY
/HANDLE
GUIDE
1/4" WELD BOLT
FIGURE 23
21. Assemble ball end of cable (see figure 21),
through round hole in cable end fitting and into
slot of fitting. See figure 23. Assemble cable
end fitting over 1/4'" weld bolt on grip assembly
and secure with one 1/4" hex lock nut, NOTE:
Do not over tighten lock nut, cable fitting must
pivot freely.

(R.H.) HITCH PLATE
_:IL,H.) HITCH PLATE
SHAFT END
/_ GUIDE
BRACKET CHANNEL
ASSEMBLY ASSEMBLY
FIGURE 24
22. Assemble guide bracket assembly shaft end
into the left hand hitch plate` See figure 24. Slide
guide assembly back to the right and into the
hole in the right hand hitch plate, and secure
with a hairpin cotter on each end, See figure
25. Lower front end of guide bracket assembly
to straddle Channel assembly. See figure 25.
(R,H.) HITCH PLATE
\
_AIRPIN COTTER HAIRPIN
//BRACKET
ASSEMBLY
FIGURE 25
jCHANNEL
_ASSEMBLY
OPERATION
AND ADJUSTMENTS
INSTRUCTIONS
HIDDEN OBJECTS CAN CAUSE
SUDDEN STOPS OR CHANGE IN
DIRECTION.
CONTROLS
Become familiar with all of the controls and
adjustments on the tractor and dozer blade before
operating. Refer to tractor owners manual for
tractor controls. Controls for operating dozer blade
are as follows:
A, Lift control lever:
Located on right hand side of tractor. See figure
26. Move lever forward to lower dozer blad& Pull
lever back to raise dozer blade, Pulling lever all.
the way back locks dozer blade in up position.
ATTACHMENT
DEPTH CONTROL
KNOB
GRIP
FIGURE 26
BLADE ANGLE
HANDLE
B° Lift lever plunger:
Located on top of lift control lever. See figure
26. Pull back on lift control lever and depress
plunger to release.
&WITH THE DOZER BLADE IN THE
"UP" POSITION DO NOT DEPRESS
THE PWNGER WITHOUT H()LDING
BACK ON THE LIFT CONTROL LEVEL
OR DOZER BLADE MAY SUDDENLY
DROP.
C. Attachment depth control knob:
Adjust lift control lever movement with attach-
ment DEPTH CONTROL KNOB (see figure 26)
for maximum movement between locking not-
ches and to prevent lever from locking in the
down lock notch. See figure 26.
D. Blade angle handle and grip assembly:
Located on right hand side of tractor. See figure
26. NOTE: Always raise dozer blade and lock
in "up" position before moving angle control
handle, Depress grip assembly to release blade
angle lock and push/pull angle control handle
forward to move dozer blade angle to left,
center, right and release grip to lock.

ADJUSTMENTS
AI Blade angle lock bars:
If angle lock bars Do Not completely disengage -
from slots in pivot plate assembly, adjustment
of cable is required. See figure 27.
B, Adjust blade springs:
To change spring tension (stand in front of blade
assembly), adjust the nuts at the upper end of
the springs (see figure 27) turning counter
clockwise (x'_) to relieve tension and
clockwise (_) to increase tension. 1/2" x 2-3/4"
HEX BOLTS
LOCK WASHERS
AND
1/2" HEX NUTS
Adjust spring adjustment nuts approximately 1"
from end when moving snow or other light
material, (keep spring tension light for safety).
This frees the blade to spring trip and return if
a hidden obstacle is encountered.
When heavier material is to be moved, adjust
spring adjustment nuts accordingly.
SPRING
ADJUSTMENT NUTS
(BLADE
ASSEMBLY
SPRING
BOLTS
LOCK SPRING /
ADJUSTMENT NUTS
(INSIDE)
PIVO1 lPLATE ,/_' CABLE
ASSEMBLY
FIGURE 27
&KNOW THE TERRAIN. AVOID EXCEP-
TIONALLY SHARP SLOPES OR DROP-
OFFS WHICH MAY BE HIDDEN BY
THE SNOW,
NEVER RUN THE DOZER BLADE
INTO HEAVY MATERIAL AT HIGH
SPEED.
FIGURE 28
&
C. Dozer spring lockout:
To lock dozer btade spring trip action for heavy
dozer work, install two 1/2" x 2-3/4" hex bolts
(included in hardware package) as shown in
figure 28. Secure with two 1/2" lock washers,
and two 1/2" hex nuts
DO NOT OPERATE TRACTOR AND /
J
DOZER BLADE AT HIGH SPEEDS
WITH SPRING TRIP ACTION IN.
LOCKED OUT POSITION. 'l
|
D. Blade shoe adjustment:
Blade shoes on ends of blade,!isee figure 29),
maybe raised for clean dozing on smooth
surfaces or lowered to raise the blade to work
on rough or uneven areas. Make sure both shoes
are set evenly and nuts are tightened securely.
BLADE
10
FIGURE 29 NOTE
--'IF
Wheel weig[_ts and tire chains should be
used with your dozer to improve traction.
For additional traction, install wheel
weights on rear of drawbar using weight
bracket kit 71-26235 and one or two
wheel weights from wheel weight kit
71-26234.
These accessories are available at your
nearest Sears retail or catalog store.