Browning 3865E Instruction Manual

Variable Pitch VL/VM/VP

with flange

Type Sheaves Mounting and Adjusting Instructions

F O R M

3865E

Revised

September 2015

• Read and follow all instructions carefully.

• Disconnect and lock-out power before installation and maintenance.

Working on or near energized equipment can result in severe injury or death.

• Do not operate equipment without guards in place. Exposed equipment can result in severe injury or death.

Single Groove Sheaves with Barrel Flats Mounting and Adjusting:

1. Make sure the shaft, sheave bore and keyway are free of burrs, paint,

etc.

2. All sheaves should be mounted on the motor or driving shaft with the

end containing the setscrew “X” toward the motor.

3. Fit shaft key “D” between sheave and shaft, and lock setscrew “X” in

place. Wrench torque 110 in-lb min. - 130 in-lb max.

4. Be sure both driving and driven sheaves are in alignment and that shafts

are parallel. Total axial and parallel misalignment must not exceed 1/4°.

5. Loosen setscrew “Y” in movable ange of sheave until movable ange

is free to rotate.

6. Adjust sheave pitch diameter for desired speed by opening rotating

parts by half or full turn increments from closed position. Do not open more than ve full turns for “A” belts or six full turns for “B” belts (1VL34 or 1VP34, 5 turns). For other belt sections contact Application Engineering for maximum full turns open.

7. Tighten setscrew “Y” to 110 to 130 in-lb. with set screw “Y” located over

center of cast ats on barrel of sheaves xed component.

8. Put on belts and adjust belt tension. (Do not force belts over grooves.)

A Browning® belt tension checker should be used to set tension.

9. Future adjustments should be made by loosening the belt tension and

increasing or decreasing the pitch diameter of the sheave by half or full turns as required. Readjust belt tension before starting drive.

10. Be sure the key is in place and that all set screws are torqued properly

before starting drive. Check setscrews and belt tension after 24 hours service.

• Periodic inspections should be performed. Failure to perform proper maintenance can result in premature product failure and personal injury.

Key“E” projects to provide a grip for removing.

Do not operate sheave projecting beyond the hub end.

Single Groove Sheaves with Barrel Keys Mounting and Adjusting:

1. Make sure the shaft, sheave bore, keys and keyways are free of burrs,

paint, etc.

2. All sheaves should be mounted on the motor or driving shaft with the

end containing the setscrew “X” toward the motor. Be sure setscrew “X” is well over the shaft.

3. Fit shaft key “D” between sheave and shaft, and lock setscrew “X” in place. Wrench torque 110 in-lb min. - 130 in-lb max.

4. Be sure both driving and driven sheaves are in alignment and that shafts are parallel. Total axial and parallel misalignment must not exceed 1/4°.

5. Loosen set screw “Y” in movable ange of sheave and pull out external key “E”. (This key projects a small amount to provide a grip for removing.)

6. Adjust sheave pitch diameter for desired speed by opening rotating parts by half or full turn increments from closed position. Do not open more than ve full turns for “A” belts or six full turns for “B” or “5V” belts (1VL34 or 1VP34, 5 turns). For other belt sections contact Application Engineering for maximum full turns open.

7. Replace key “E” and tighten setscrew “Y” to 110 to 130 in-lb.

8. Put on belts and adjust belt tension. (Do not force belts over grooves.)

A Browning belt tension checker should be used to set tension.

9. Future adjustments should be made by loosening the belt tension and increasing or decreasing the pitch diameter of the sheave by half or full turns as required. Readjust belt tension before starting drive.

10. Be sure that all keys are in place and that all setscrews are torqued properly before starting drive. Check setscrews and belt tension after 24 hours service.

OD notched here.

Two Groove Sheaves Mounting and Adjusting:

1. Make sure the shaft, sheave bore, keys and keyways are free of burrs,

paint, etc.

2. Remove key “E” from sheave. Unscrew anges until setscrew “X” is

visible. If setscrew “X” is at an angle, ange may have to be removed in order to tighten it.

3. All sheaves should be mounted on the motor or driving shaft with the end containing the setscrew “X” toward the motor. If setscrew “X” is at an angle, mount away from motor.

4. Fit shaft key “D” between sheave and shaft, and lock set screw “X” in place. Wrench torque 110 in-lb min. - 130 in-lb max. Replace outboard ange.

5. Be sure the center ange of both the driving and driven sheaves are in alignment and shafts are parallel.

6. Total axial and parallel misalignment must not exceed 1/4°.

Key“E” projects to provid

a grip for removing.

Each ange of the sheave has a small notch on the O.D. of the ange. This mark is located directly over the keyway on the two adjustable anges and over one of the keyways on the non-adjustable (center) ange. To obtain proper adjustments:

7. Loosen setscrews “Y” in moving anges and pull out key “E”. (This key projects a small amount to provide a grip for removing.)

8. Rotate both movable anges inward until they touch the center ange.

9. Locate the notch over the keyway on the center ange.

10. Open each movable ange until its notch is adjacent to the notch on

the center ange. Be certain that neither movable ange is opened more than one full turn.

11. From the position obtained in Step 4, open each movable ange the same number of full or half turns until the desired number of turns is obtained. Do not open more than ve full turns for “A” belts or six full turns for “B” belts. (2VP36 5 turns). For other belt sections contact Application Engineering for maximum full turns open.

12. Replace key “E” and tighten setscrews “Y”. Wrench torque 110 in-lb min. - 130 in-lb max.

13. Put on belts and adjust belt tension. (Do not force belts over anges.) A Browning belt tension checker should be used to set tension.

14. Future adjustments should be made by loosening the belt tension and increasing or decreasing the pitch diameter of the sheave by half or full turns as required. Readjust belt tension before starting drive.

15. Two groove sheaves must have both halves adjusted by the same number of turns from the position established in Step 4 to ensure the same pitch diameter.

16. Be sure that all keys are in place and that all setscrews are torqued properly before starting drive. Check setscrews and belt tension after 24 hours service.