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6

Making  

Adjustments

WARNING

Do not move the gear 
selection handle 
with the wheels or 
tines engaged. Make 
certain the unit is 
stopped completely 
before changing the 
gear selection. A 
partial engagement 
may be necessary 
when engaging tines. 
Do not push down 
on the handles so 
that the wheels are 
lifted off the ground 
while using the tine 
drive, or the tiller 
could move backward 
and cause personal 
injury.
Never attempt to 
make any adjust-
ments while the 
engine is running, 
except where speci-
fied in operator’s 
manual.

To adjust the depth stake, remove the clevis pin and hairpin 
clip. Move the depth stake to the desired setting and 
secure with the clevis pin and hairpin clip. See Figure 7.
To adjust the side shields, remove the wing nuts. Move 
the side shield to the desired position and replace the 
wing nuts. Tighten securely.

Operating the Tiller

•  Select the depth stake setting.
•  Start engine as instructed on the previous page.
•  Move gear selection handle to one of the forward 

modes or reverse. 

WARNING:  Do not move the gear 
selection handle with the wheels or 
tines engaged. Make certain the unit is 
stopped completely before changing 
the gear selection. A partial engage-
ment may be necessary when engaging 
tines. 

IMPORTANT:  Use the reverse tine drive when tilling 
virgin ground, sod, or hard soil. Use the forward tine drive 
when cultivating or tilling soft ground. 
•  Squeeze the clutch handle against the handle to 

engage the wheels and tines.

NOTE:  

Make certain the gear selection indicator is 

correctly positioned before engaging the clutch handle. If 
it is between gears, the engine will stall.
To transport tiller, 

do not 

engage the tines. Select the 

wheel drive only.

WARNING:  Do not push down on the 
handles so that the wheels are lifted off 
the ground while using the tine drive, 
or the tiller could move backward and 
cause personal injury.

For best results, it is recommended the garden be tilled 
twice (lengthwise, then width-wise) to pulverize the soil.

Making Adjustments

WARNING:  Never attempt to make 
any adjustments while the engine is 
running, except where specified in 
operator’s manual.

Handle Adjustment

The handle height may be adjusted to the desired height. 
Refer to the handle adjustment in Know Your Tiller 
section.

Belt Tension Adjustment

Periodic adjustment of the belt tension may be required 
due to normal stretch and wear on the belt. Adjustment 
is needed if the tines or wheels seem to hesitate while 
turning, but the engine maintains the same speed.
To adjust the tension on the belt, refer to Final Clutch 
Adjustment in Assembly Instructions.
After belt tension has been adjusted, if the belt is 
excessively stretched, you may need to adjust the idler 
pulley rod. This can easily be checked.
With the engine off and the clutch control bail disen-
gaged, shift the gear selection handle to each forward 
mode. If the indicator bracket touches the idler pulley 
rod (with the clutch control bail disengaged), then an 
adjustment is necessary.
•  Disconnect and ground out spark plug wire against 

the engine.

•  Remove the belt cover as described under Belt 

Replacement in the Maintenance section.

•  Remove the hairpin clip and spring washer from the 

idler pulley rod. Refer to Figure 9.

•  Move the idler pulley rod to the lower hole in the idler 

bracket.

•  Replace the spring washer and hairpin clip.
•  Check clearance of the idler pulley rod to the 

indicator bracket by shifting to each forward mode, 
as before.

Engine Adjustment

Refer to the separate engine manual for engine adjust-
ment instructions.

Summary of Contents for 450 Series

Page 1: ...ined in effective working order by the operator In the State of California the above is required by law Section 4442 of the California Public Resources Code Other states may have similar laws Federal...

Page 2: ...orized service dealer Please do NOT return the unit to the retailer from which it was purchased without rst contacting Customer Support Customer Support If you have difficulty assembling this product...

Page 3: ...CHILDREN OR UNINSTRUCTED ADULTS TO OPERATE TILLER 5 SHUT OFF ENGINE BEFORE U NCLOGGING TINES OR MAKING REPAIRS 6 KEEP BYSTANDERS AWAY FROM M ACHINE 7 KEEP AWAYFROM ROTATING PARTS 8 USE EXTREME CAUTION...

Page 4: ...ry can occur when gasoline is spilled on yourself or your clothes which can ignite Wash your skin and change clothes immediately 7 Use only an approved gasoline container 8 Extinguish all cigarettes c...

Page 5: ...es Check their proper operation regularly 2 Check bolts and screws for proper tightness at frequent intervals to keep the machine in safe working condition Also visually inspect machine for any damage...

Page 6: ...pth stake assembly Place flat washer on the hex bolt and thread T knob onto the hex bolt Tighten securely See Figure 1 Tip the tiller back down so it rests on the tines Attaching Handle Assembly Remov...

Page 7: ...bail engaged adjust by unthreading the internally threaded tube at the end of the cable a few turns clockwise when standing in operator s position and then retighten the nut against the tube Now move...

Page 8: ...he reverse tine drive when tilling virgin ground sod or hard soil Use the forward tine drive when cultivating or tilling soft ground NOTE If difficulty is encountered in moving the gear selection hand...

Page 9: ...to enrich the fuel mixture in the carburetor when starting a cold engine This symbol points out important safety instructions which if not followed could endanger the personal safety and or property...

Page 10: ...ace the engine speed control in the START position Move choke lever to CHOKE position or if equipped push primer two 2 or three 3 times Wait about two 2 seconds between each push NOTE A warm engine ma...

Page 11: ...t the wheel drive only WARNING Do not push down on the handles so that the wheels are lifted off the ground while using the tine drive or the tiller could move backward and cause personal injury For b...

Page 12: ...remely dusty conditions Poor engine performance and flooding usually indicates that the air cleaner should be serviced To service the air cleaner refer to the separate engine manual packed with your u...

Page 13: ...Fill tank with clean fresh gasoline Fuel will not last over thirty days unless a fuel stabilizer is used Move throttle lever to start position Clean fuel line Refer to the engine manual packed with y...

Page 14: ...13 29 35 16 53 35 16 46 31 28 12 45 17 17 44 36 6 3 33 15 27 5 36 43 4 20 40 21 1 34 18 10 42 23 7 22 36 8 47 32 37 50 25 10 9 24 36 51 34 45 26 41 36 35 16 29 19 49 44 33 14 35 16 2 14 28 35 16 14 11...

Page 15: ...fting Fork 22 717 1582 Spur Gear 44T 23 717 1583 Spur Gear 30T 24 717 1584 Spur Gear 30T 25 717 1585 Spur Gear 44T 26 717 1587 Spur Gear 44T Ref Part No Part Description 27 717 1594 Spur Gear 16T 28 7...

Page 16: ...23 10 1 60 61 37 62 25 34 27 64 30 39 63 26 32 36 33 31 29 66 26 41 30 30 24 28 35 40 26 49 44 50 59 51 65 53 55 56 54 57 58 44 46 42 4 9 11 16 6 3 14 7 19 5 17 2 60 61 12 15 12 38 21 22 67 70 70 68 6...

Page 17: ...69 Lock Washer 3 8 30 712 04063 Flange Nut 5 16 18 31 726 0106 Cap Nut 32 738 0849 Hex Screw 5 16 18 x 75 33 747 0432 Rod 34 750 0885A Spacer 322 x 625 x 2 0 Ref Part No Part Description 35 786 0090 S...

Page 18: ...18 33 35 4 38 37 34 24 7 41 3 16 15 13 21 25 14 1 11 2 8 6 27 5 39 20 31 32 29 Wheel shaft shown for reference only 36 18 12 26 43 42 17 28 40 44 45 9...

Page 19: ...ey Half 23 756 0972 Inner Engine Pulley Half Ref Part No Part Description 24 756 1162 Input Pulley 25 786 0064A Idler Bracket 26 786 0185 Belt Keeper Bracket 27 786 0187 Shift Cover Bracket 28 786 019...

Page 20: ...the exterior finish due to use or exposure d Service completed by someone other than an authorized service dealer e MTD does not extend any warranty for products sold or exported outside of the United...

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