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Adjusting the Flow Baffle

You can adjust the mower-discharge flow for different
types of mowing conditions. Position the baffle to give
the best quality of cut.

1.

Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut off
the engine, and remove the key.

2.

Loosen the nut (

Figure 14

).

g295677

Figure 14

1.

Nut

2.

Baffle-adjustment decal

3.

Adjust the baffle and nut in the slot to the desired
discharge flow; refer to

Positioning the Flow

Baffle (page 15)

.

4.

Tighten the nut.

Positioning the Flow Baffle

Refer to the following sections for a description of
each flow-baffle position.

Figure 14

illustrates each

position (i.e., A, B, and C) as seen on the decal.

The following positions are only recommendations for
use. Adjustments will vary by grass type, moisture
content, and height of grass.

Note:

If the engine power draws down and the

mower ground speed is the same, open up the baffle.

Position A

This is the full rear position. The suggested use for
this position is a follows.

Use for short, light grass mowing conditions.

Use in dry conditions.

For smaller grass clippings.

Propels grass clippings farther away from the
mower.

Position B

Use this position when bagging. Always align it with
the blower opening.

Position C

This is the full open position. The suggested use for
this position is as follows.

Use in tall, dense grass mowing conditions.

Use in wet conditions.

Lowers the engine power consumption.

Allows increased ground speed in heavy
conditions.

Correcting a Cutting Unit
Mismatch

Due to differences in grass conditions and the
counterbalance setting of the traction unit, it is advised
that grass be cut and appearance checked before
formal cutting is started.

1.

Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut off
the engine, and remove the key.

2.

Set the cutting unit to the desired height of cut;
refer to

Adjusting the Height of Cut (page 12)

.

3.

Check and adjust the front and rear traction-unit
tire pressure to the specified tire pressure in the
traction unit

Operator’s Manual

.

4.

Check for bent blades; refer to

Checking for a

Bent Blade (page 21)

.

5.

Cut grass in a test area to determine if all cutting
units are cutting at the same height.

6.

If cutting unit adjustments are still needed, find a
flat surface using a 2 m (6 ft) or longer straight
edge.

7.

To ease measuring blade plane, raise the height
of cut to the highest position; refer to

Adjusting

the Height of Cut (page 12)

.

8.

Lower cutting unit onto the flat surface. Remove
the covers from the top of the cutting units.

9.

Rotate the blade on each spindle until the ends
face forward and backward.

10.

Measure from the floor to the front tip of the
cutting edge.

If the measurements do not match the desired
height of cut and pitch, refer to

Adjusting the

Cutting-Unit Pitch (page 13)

.

11.

Adjust the castor-wheel spacers to match the
height of cut listed on the castor-wheel decal;
refer to

Positioning the Castor-Fork Spacers

(page 12)

.

15

 

Summary of Contents for 31970

Page 1: ...or 72in Side Discharge Rotary Mower Groundsmaster 3200 or 3300 Series Traction Unit Model No 31970 Serial No 400000000 and Up Model No 31972 Serial No 400000000 and Up Register at www Toro com Origin...

Page 2: ...accessory information help finding a dealer or to register your product Whenever you need service genuine Toro parts or additional information contact an Authorized Service Dealer or Toro Customer Se...

Page 3: ...ts Always follow all safety instructions to avoid serious personal injury Read and understand the contents of this Operator s Manual before starting the machine Use your full attention while operating...

Page 4: ...2 Add SAE 80w 90 API GL 5 oil every 50 hours decal93 7818 93 7818 1 Warning read the Operator s Manual for instructions on torquing the blade bolt nut to 115 to 149 N m 85 to 110 ft lb decal117 4979...

Page 5: ...cut decal131 1180 131 1180 1 Read the Operator s Manual 3 Bagging setting 2 Short light grass dry conditions 4 Tall dense grass wet conditions decal133 8061 133 8061 decal137 5945 137 5945 1 Height of...

Page 6: ...moving parts keep all guards and shields in place decal140 3073 140 3073 1 Thrown object hazard keep bystanders away 3 Cutting dismemberment hazard of hand or foot mower blade stay away from moving p...

Page 7: ...decal137 5949 137 5949 1 Height of cut 2 Mounting holes 7...

Page 8: ...l the cutting unit 6 No parts required Grease the machine WARNING If you leave the key in the switch someone could accidentally start the engine and seriously injure you or other bystanders Remove the...

Page 9: ...Park the machine on a level surface move the lift arms to the lowest position engage the parking brake shut off the engine and remove the key 2 Position the cutting unit in front of the traction unit...

Page 10: ...g the PTO Cover Parts needed for this procedure 2 Shoulder bolt 2 Spacer Procedure Use 2 shoulder bolts and 2 spacers to secure the PTO cover to the gearbox Figure 5 g296657 Figure 5 1 Shoulder bolt 3...

Page 11: ...e without notice Width of Cut Model No 39190 1 52 m 60 inches Model No 31972 1 82 m 72 inches Height of Cut Adjustable from 25 to 152 mm 1 to 6 inches in 13 mm 1 2 inch increments Net Weight Model No...

Page 12: ...to position the lift arm chains refer to Positioning the Height of Cut Chain page 13 Positioning the Castor Wheel Axles Position the castor wheel axles in the same holes in both castor forks Refer to...

Page 13: ...ould not be twisted Adjusting the Cutting Unit Pitch A blade pitch of 6 to 9 5 mm 1 4 to 3 8 inch is recommended i e the back of the blade plane is 6 to 9 5 mm 1 4 to 3 8 inch higher than the front A...

Page 14: ...he nearest corresponding height of cut desired g296902 Figure 12 Front rollers shown 1 Anti scalp roller 3 Flange nut 2 Bushing 4 Bolt Adjusting the Skid Mount the skid in the lower position when oper...

Page 15: ...nditions Lowers the engine power consumption Allows increased ground speed in heavy conditions Correcting a Cutting Unit Mismatch Due to differences in grass conditions and the counterbalance setting...

Page 16: ...height to ensure that uneven turf is not cut too short Select the Proper Height of Cut Setting to Suit Conditions Remove approximately 1 inch 25 mm or no more than 1 3 of the grass blade when cutting...

Page 17: ...e the grease fittings immediately after every washing Check the gearbox lubricant Tighten the castor wheel nuts Check the blade drive belt adjustment Clean under the cutting unit belt covers Every 100...

Page 18: ...te the grease fittings immediately after every washing The machine has grease fittings that you must lubricate regularly with No 2 lithium grease 1 Park the machine on a level surface lower the cuttin...

Page 19: ...g010548 Figure 17 1 Dipstick fill plug 3 Install the dipstick and torque it to 9 N m 84 in lbs Checking the Torque of the PTO Driveshaft to Gearbox Fasteners Service Interval After the first 10 hours...

Page 20: ...e shut off the engine and remove the key 2 Remove the tensioning cap spacer s and thrust washer from the top of the castor spindle 3 Pull the castor spindle out of the mounting tube Allow the thrust w...

Page 21: ...an cause other blades to rotate Checking for a Bent Blade After striking a foreign object inspect the machine for damage and make repairs before starting and operating the equipment Torque all of the...

Page 22: ...p straight thereby producing an even cut and gradually wears down during operation 1 Park the machine on a level surface raise the cutting unit to the TRANSPORT position engage the parking brake shut...

Page 23: ...proceed to step 7 and add shims between the spindle housing and the bottom of the cutting unit 7 Remove the bolts flat washers lock washers and nuts from the outer spindle in the area where the shims...

Page 24: ...that the L end of the spring is installed behind the cutting unit edge before installing the bolt as shown in Figure 30 4 Install the bolt and nut Place the J hook end of the spring around the grass d...

Page 25: ...tings and pivot points 3 Check and adjust the traction unit front and rear tire pressure refer to the traction unit Operator s Manual 4 Remove sharpen and balance the cutting unit blades Install the b...

Page 26: ...wer 2006 42 EC 2000 14 EC Relevant technical documentation has been compiled as required per Part B of Annex VII of 2006 42 EC We will undertake to transmit in response to requests by national authori...

Page 27: ...to restaurants grocery stores hotels schools and hospitals and on a wide variety of products Additionally some online and mail order retailers provide Prop 65 warnings on their websites or in catalogs...

Page 28: ...ered for the duration of the original product warranty and become the property of Toro Toro will make the final decision whether to repair any existing part or assembly or replace it Toro may use rema...

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