2000/12/18 Caterpillar

Combine:

470 (PIN: 9TW1-UP)

480 (PIN: 2BZ1-UP)

485 (PIN: 8ZW1-UP)

Reference: Disassembly and Assembly, RENR1716

The 188-1140 300 RPM Drive Kit for rotors reduces the rotational speeds of the rotors. In harvesting that involves separating high volumes of grain such as corn, reducing rotor speeds can be beneficial. Also, slower rotor speeds can reduce damage in crops such as edible beans and popcorn.

Note: With the installation of the 188-1140 300 RPM Drive Kit, the ability to quickly change between the 500 RPM, 640 RPM, and 800 RPM options will be lost.

Required Parts

Procedure

Illustration 1	g00751686
(1) 151-9080 Washer (2) 179-4535 Pulley (3) 179-4536 Spacer (4) 179-4537 Belt (5) 187-1171 Bolt

1. Disengage the lever in order to release the tension on the drive belt for the rotor.

2. Remove the existing belt.

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Illustration 2	g00751684

3. Remove pulley (A) and pulley (B) from the hub.

   Note: Retain pulley (B). Also retain three bolts (C), washers, and nuts that hold pulley (B) on the hub. Pulley (B) will be reinstalled later.

4. Use existing three bolts (C), washers, and nuts in order to install 179-4536 Spacer (3) onto the hub. Refer to Illustration 1 for the location of spacer (3) .

5. Reinstall pulley (B) onto spacer (3). Use three 151-9080 Washers (1) and three 187-1171 Bolts (5). Refer to Illustration 1.

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Illustration 3	g00751689

6. Remove pulley (D) and pulley (E) from the hub.

   Note: Retain three bolts (F), washers, and nuts that hold pulley (E) on the hub. The bolts, washers, and the nuts will be reinstalled later.

7. Use existing three bolts (F), washers, and nuts in order to install 179-4535 Pulley (2). Refer to Illustration 1 for the location of pulley (2) .

8. Install new 179-4537 Belt (4). Refer to Illustration 1.

9. Engage the lever in order to tension the drive belt for the rotor.

10. After installation, prepare the machine for operation.