INSTRUCTION BULLETIN
No. 340575
Machine: 5700, 7200
Published: 2-03
Rev. 01
NOTE: DO NOT DISCARD the Parts List from the Instruction Bulletin. Place the Parts
List in the appropriate place in your machine manual for future reference.
Retaining the Parts List will make it easier to reorder individual parts and will
save you the cost of ordering an entire kit.
NOTE: Numbers in parenthesis ( ) are reference numbers for parts listed in Bill of Materials.
Installation instructions for kit number 377495
DESCRIPTION:
This kit contains the parts needed to replace the standard cylindrical brush rubber drive belt
with the new poly chain belt on the model 5700 and 7200 scrubbers.
Please follow step-by-step instructions.
SPECIAL TOOLS / CONSIDERATIONS: The Belt Tensions For The Rubber And Polychain
Belts Are Different.
(Estimated time to complete: 1 hour)
5700 CYLINDRICAL BRUSH DRIVE BELTS
TO REPLACE BRUSH DRIVE BELTS
FOR SAFETY: Before Leaving Or Servicing Machine;
Stop On Level Surface, Set Parking Brake, Turn Off
Machine And Remove Key.
1. Raise the solution tank until the prop rod is
engaged. Remove the four M8 hex screws holding
the front cover to the machine. Remove the cover.
IB 340575 (2-03)
1
2. Remove the scrub brush from the motor that the belt
needs to be changed.
3. Loosen the front and rear pivot bolts on the brush
motor.
4. Remove the two M6 hex screws holding the belt cover
on the motor that the belt needs changing. Remove
the belt cover from the scrub head.
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IB 340575 (2-03)
5. Loosen the M8 hex nut on the belt tension bolt
under the motor. Turn the tension bolt down far
enough to allow the belt to be slipped off the motor
pulley. Push the drive belt down toward the lower
pulley in the brush area.
NOTE: Make sure the scrub head is in the raised
position before attempting to remove the drive plug
rubber seal.
6. Using a needle nose pliers, pull the rubber seal
off the brush drive plug.
7. Pull the drive belt off the bottom drive pulley.
NOTE: It is a tight fit for the belt in the area of the lower
belt cover and bottom pulley. Carefully work the belt
past the lower cover, DO NOT remove the lower cover.
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3
8. Slip the new drive belt past the lower belt cover and
over the cogged pulley. Push the rest of the belt up to
the drive motor and onto the drive pulley. Reinstall the
rubber seal on the bottom drive pulley.
Do not remove
this cover
9. Using the M8 hex screw located under the brush
motor, tension the new belt by applying 1.37 -- 1.48 kg
(3.01 -- 3.26 lb) of force per belt at the middle of the
span that is opposite the belt travel with a deflection of
0.10 inch.
When re--using an old belt, measure and record the
belt tension before removal, so that the belt can be
reinstalled at the same tension.
If the old belt tension was not recorded, the
recommended force per old belts is 1.03 -- 1.14 kg
(2.28 -- 2.52 lb) with a deflection of 0.10 inch.
10. Tighten the two pivot bolts to 18 -- 24 Nm
(15 -- 20 ft lb). Re--check the belt tension.
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IB 340575 (2-03)
11. Reinstall the belt cover, two M6 hex screws, and
washers. Tighten to 11 -- 14 Nm (7 -- 10 ft lb).
Use a small amount of RTV on the flange of the
belt cover to keep dust out.
12. Reinstall the scrub brush. See TO REPLACE A
CYLINDRICAL SCRUB BRUSH instructions in this
section.
13. Reinstall the front cover using the four M8 hex
screws. Tighten to 18 -- 24 Nm (15 -- 20 ft lb).
14. Lower the solution tank, operate the machine,
check for proper operation.
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5
7200 CYLINDRICAL BRUSH DRIVE BELTS
The two brush drive belts are located on
the cylindrical brush scrub head. The belts drive the
cylindrical brushes. Proper new belt tension is a
3 mm (0.1 in) deflection from a force of
1.37 -- 1.48 kg (3.01 -- 3.26 lb) at the belt midpoint.
When re--using an old belt, measure and record the belt
tension before removal, so that the belt can be reinstalled at
the same tension.
If the old belt tension was not recorded, the recommended
force per old belts is 1.03 -- 1.14 kg (2.28 -- 2.52 lb) with a
deflection of 0.10 inch.
TO REPLACE BRUSH DRIVE BELT
1. Start the machine and lower the scrub head near the
floor. Shut off the key.
FOR SAFETY: Before Leaving Or Servicing
Machine; Stop On Level Surface, Set Parking
Brake.
2. Remove the scrub brushes. See TO REPLACE
CYLINDRICAL SCRUB BRUSHES instructions.
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IB 340575 (2-03)
3. Remove the two screws holding the belt cover to the
scrub brush motor. Remove the belt cover from the
scrub head.
4. Loosen the two pivot bolts on the bottom of the
brush motor.
5. Loosen the belt tension bolt under the brush motor.
Turn the bolt down far enough to allow the belt to
be slipped off the motor pulley. Push the drive belt
down toward the lower brush drive plug.
NOTE: Make sure the scrub head is slightly off the floor
before attempting to remove the drive plug rubber seal.
6. Cut the RTV sealant around the rubber seal.
Use a needle nose pliers to remove it from the
brush drive plug. Note the orientation of the seal.
Remove the drive plug.
7. Remove the brush drive belt from the machine.
NOTE: It is a tight fit for the belt in the area of the
lower belt cover and bottom drive plug. Carefully work
the belt past the lower cover----DO NOT remove the
lower cover.
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8. Slip the new drive belt into position. Push the rest of
the drive belt up toward the motor belt pulley. Slip the
drive belt over the motor belt pulley.
9. Reinstall the brush drive plug. Install the drive belt
over the drive plug.
10. Reinstall the rubber seal on the drive plug. Note the
orientation of the seal. Use RTV--Blue sealant all
around the seal when installing.
11. Use the tension bolt under the drive motor to tighten
the drive belt. Proper new belt tension is a 3 mm
(0.1 in) deflection from a force of 1.37 -- 1.48 kg
(3.01 -- 3.26 lb) at the belt midpoint.
When re--using an old belt, measure and record the
belt tension before removal, so that the belt can be
reinstalled at the same tension.
If the old belt tension was not recorded, the
recommended force per old belts is 1.03 -- 1.14 kg
(2.28 -- 2.52 lb) with a deflection of 0.10 inch.
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IB 340575 (2-03)
12. Tighten the drive motor pivot bolts to 18 -- 24 Nm
(15 -- 20 ft lb). Re--check the belt tension.
13. Reinstall the belt cover. Tighten the screws to
11 -- 14 Nm (7 -- 10 ft lb).
14. Reinstall the scrub brushes. See TO REPLACE
CYLINDRICAL SCRUB BRUSHES instructions.
15. Operate the machine and check the scrub
brushes for proper operation.
IB 340575 (2-03)
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BILL OF MATERIALS FOR BELT REPLACEMENT KIT 377495
Ref.
1
2
3
4
TENNANT
Part No.
Description
377500
375195
222751
222820
Belt, synchronous, 15 MM, 05P, 500L [plychn]
Sprocket, timing, 22 tooth, 0.50B [GT/2]
Plug assy, drive, brush, [48 tooth--GT/2]
Seal
Qty.
2
2
2
2
TENNANT COMPANY
P. O. Box 1452
Minneapolis, MN 55440-1452
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IB 340575 (2-03)
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