Vaccon 691-5001 User manual

Vacuum System
Operation and
Maintenance
Manual
691-5001
Section 50
Belt Drive and Hydrostatic Drive
Vacuum Systems

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Vacuum System Operation
and Maintenance Manual
VAC-CON
Safety Instructions
Most accidents that involve product operation, maintenance and repair are caused by failure to observe basic safety
rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an
accident occurs. A person must be alert to potential hazards. This person should also have the necessary training,
skills and correct tools to perform these functions properly.
Improper operation, lubrication, maintenance or repair on this product can be dangerous and could result in injury
or death.
DO NOT operate or perform any lubrication, maintenance or repair of this product until you have read and
understood the information provided to you by the manufacturer.
Safety precautions and warnings are provided in this manual and on the equipment. It is your responsibility to read
and understand these precautions for your own safety. If these warnings are not followed, bodily injury or death
could occur to you or other persons.
The hazards are identified by the safety alert symbol and followed by a signal word such as CAUTION,
WARNING OR DANGER as shown below.
WARNING
The message that appears under the signal word explains the hazard and can be either written or pictorially
presented.
Vac-Con Inc. cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in
this publication and on the product are therefore not all inclusive. If a tool, procedure, work method or operating
technique that is not specifically recommended by Vac-Con Inc. is used, you must satisfy yourself that it is safe by
the operation, lubrication, maintenance or repair procedure that you choose.
The information, specifications and illustrations in this publication are based on the information that was available at
the time the publication was written. The specifications, torque values, pressures, measurements, adjustments,
illustrations, tools, part numbers and other items may change at any time. These changes can affect the service that
was given to the product.Always contact your Vac-Con Inc. dealer to obtain the most complete and current
information before starting any repair.

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Vacuum System Operation
and Maintenance Manual
Vacuum Breaker Operation
1. The vacuum breaker control is located on the top of the hose reel control panel on the curb side.
2. On units with belt driven compressors, the parking brake must be engaged and the splitshaft/PTO must be
engaged for the vacuum breaker doors to function.
3. On units with hydrostatic driven compressors, the parking brake must be engaged for the vacuum breaker doors
tofunction.
4. While vacuuming, the vacuum breaker switch must be in the ON position with vacuum breaker doors open.
When the debris body reaches its maximum capacity, the vacuum breaker doors will close, stopping all air flow.
5When this condition occurs you must either drain off the excess water in the debris body or dump the material
out of the debris body to allow the vacuum breaker doors to reopen.
6. With the vacuum breaker switch in the ON position the doors will also close when the operator disengages the
parking brake. This feature is to ensure there will be no carry over of material from the debris body to the
vacuumcompressorduringtransport.
7. With the vacuum breaker switch in the ON position, if the operator needs to stop the flow of air to dislodge any
debris from the end of the air tube he can just reach over and turn the vacuum breaker switch to the OFF
position to stop the air flow. Then, turn the switch back to the ON position and continue vacuuming.
8. The vacuum breaker switch should be left in the “ON” position at all times, except as described in #7.
Lubrication Note: There are two grease fittings on the vacuum breaker door assembly shaft that requires grease
monthly.

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Vacuum System Operation
and Maintenance Manual
Vacuum Compressor Operation
Belt Driven Compressor - Standard Transmission
1. Position truck at area to be cleaned.
2. Engage parking brake.
3. With clutch depressed and engine at idle speed, transmission in the neutral position, engage splitshaft only,
controls located to the right of the drivers seat.
4. Depress the clutch and shift the transmission into first gear, slowly release the clutch against the foot brake and
parking brake to ensure the rear axle is disengaged. Be sure no personnel are in front of the vehicle, during this
testonly.
5. With the clutch depressed and engine at idle speed, transmission in neutral position, engage blower PTO
controls located to right of drivers seat.
6. Rear wheel chocks are optional (recommended on unlevel grades or for additional safety).
7. Putthetransmissioninthehighestgearavailable.
8. Releaseclutchslowlytoengagevacuumdrive.
9. Exit cab.
10. Make sure all personnel are clear of the vacuum nozzle.
11. Slowly increase speed of blower by turning out the throttle control located on hose reel to an operating range of
2200-2500 RPM.
12. To stop compressor, turn throttle cable in until engine reaches idle speed.
13. Enter cab.
14. Depress clutch pedal, and place transmission in the neutral position.
15. Wait one to two minutes until compressor has come to a complete stop.
16. DisengagePTOandsplitshaftcontrols.
NOTE: If you do not follow step 12 & 13 exactly as stated, damage can occur to the splitshaft/PTO arrangement.
17. Truck is now ready for transport.
LUBRICATION NOTE: All grease fittings located at the vacuum compressor MUST be greased at least
once a day.

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Vacuum System Operation
and Maintenance Manual
Vacuum Compressor Operation
Belt Driven Compressor - Automatic Transmission
1. Position truck at area to be cleaned.
2. Engageparkingbrake.
3. With engine at idle speed and transmission in the neutral position, engage splitshaft only, controls located to the
right of the drivers seat.
4. Apply the foot brake and parking brake, then select drive, slowly release the foot brake to ensure the rear axle
is disengaged. Be sure no personnel are in front of the vehicle, during this test only.
5. With the engine at idle speed, transmission in the neutral position, engage the blower PTO control located to the
right of drivers seat.
6. Rear wheel chocks are optional (recommended on unlevel grades or for additional safety).
7. Putthe transmission into the drive position.
8. Exit cab.
9. Make sure all personnel are clear of the vacuum nozzle.
10. Slowly increase speed of blower by turning out the throttle control located on the hose reel to an operating
range of 2250-2500 RPM.
11. To stop compressor, turn the throttle cable in until engine reaches idle speed.
12. Enter cab.
13. Placetransmissionintheneutralposition.
14. Wait one to two minutes until compressor has come to a complete stop.
15. DisengagePTOandsplitshaftcontrols.
NOTE: If you do not follow step 11 & 12 exactly as stated, damage can occur to the splitshaft/PTO arrangement.
16. Truck is now ready for transport.
LUBRICATION NOTE: All grease fittings located at the vacuum compressor MUST be greased at least
once a day.

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Vacuum System Operation
and Maintenance Manual
Vacuum Compressor Operation
Hydrostatic Driven Compressor -
Automatic or Standard Transmission
1. Position truck at area to be cleaned.
2. Engageparkingbrake.
3. Puttransmissionintheneutralposition.
4. Exit cab.
5. Make sure all personnel are clear of the vacuum nozzle.
6. With engine at idle speed, engage stroking lever on hydrostatic pump.
7. Slowly increase speed of blower by turning out the throttle control located on the hose reel to an operating
range of 1800-2500 RPM depending on system used. At the appropriate RPM the high pressure gauge should
read between 5000-6000 RPM on a three stage compressor or 3500-4000 RPM on a two stage compressor.
8. To stop the compressor, turn the throttle cable in or use the electronic throttle switch to decrease the RPM until
engine reaches idle speed.
9. Disengage the stroking lever on the hydrostatic pump.
10. Truck is now ready for transport.
LUBRICATION NOTE: All grease fittings located at the vacuum compressor MUST be greased at least
once a day.

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Vacuum System Operation
and Maintenance Manual
Vacuum Compressor Drive Belt Adjustment
and Replacement
Belt Drive Vacuum Compressors
Safety Precautions
1. It is very important that the drive belts are properly tightened.
2. Insufficientlytightenedbeltsareafirehazardandwillcauseexcessivebeltfailure.
3. Excessivelytightenedbeltswilldecreasebearing life and could cause shaft failure, and/or premature belt failure.
4. Correct belt tension MUST be maintained at all times during operation.
5. It is important to watch the belts closely during the first 100 hours of operation because more frequent
adjustmentmaybe required during this period when slight belt sealing and initial stretching will occur.
6. Belts or powerbands MUST be replaced in complete “matched” sets.
7. Belts are within the correct tensioning range when a force of 20-30 pounds applied midway between the
sheaves is required to deflect each belt powerband approximately 1/2".
8. DO NOT attempt to move the sheave or the blower. The main drive should always be
tightened and /or aligned by adjusting the jackshaft.

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Vacuum System Operation
and Maintenance Manual
Belt Adjustment
1. Turn off the truck chassis engine and remove the switch key from the ignition.
2. Remove the blower belt guards.
3. Loosen the four 5/8" bolts holding both ends of the turnbuckles.
4. Loosen the two 1" bolts holding the drive bearing weldment to the frame.
5. Loosen the jam nuts on the turnbuckles.
6. Turn the turnbuckles until a force of 20 to 30 pounds applied midway between the sheaves at 1/2" deflection is
acquired.
7. Be sure to turn both turnbuckles an equal distance.
8. Check sheave alignment with a straight edge or string, making sure the straight edge or string contacts the face
of both sheaves immediately above the shafts at the same time, to make sure there is no angular misalignment or
offset between the sheaves.
9. If a small amount of adjustment is necessary this may be accomplished by turning one or the other turnbuckle.
10. If a larger amount of adjustment is required it may be necessary to shim one or the other pillow block bearing.
11. Afterall adjustments are accomplished, tighten the two turnbuckle jam nuts.
12. Tighten the two 1" bolts holding the drive bearing weldment to the frame.
13. Tighten the four 5/8" bolts holding both ends of the turnbuckles.
14. Reinstalltheblowerbeltguards.
15. Reinstall the switch key in the ignition, start the chassis engine, and engage the blower.
16. Visually check for excessive belt slap and readjust if necessary.
SAFETY NOTE: NEVER run the blower without the belt guards in place.

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Vacuum System Operation
and Maintenance Manual
Belt Removal
1. Turn off the truck chassis engine and remove the switch key from the ignition.
2. Remove the blower belt guards.
3. Loosen the four 5/8" bolts holding both ends of the turnbuckles.
4. Loosen the two 1" bolts holding the drive bearing weldment to the frame.
5. Loosen the jam nuts on both turnbuckles.
6. Using a chain or comealong, hook the drive bearing weldment to the boom frame.
7. Remove the two 5/8" bolts holding the turnbuckles to the truck subframe and swing out of the way.
8. Pull up on the chain or comealong taking all the tension off the drive belts.
9. Loosen the two 5/8" bolts holding the front pillow block jackshaft bearing to the drive bearing weldment.
10. Remove the two 5/8" bolts holding the rear jackshaft pillow block bearing to the drive bearing weldment.
NOTE: DO NOT remove the bearing from the jackshaft and DO NOT loosen the bearing adjustment bolts.
11. Slide the belts off the sheave and over the rear pillow block bearing.
12. Remove the two 5/8" bolts holding the blower pillow block bearing to the blower frame.
NOTE: DO NOT remove the bearing from the shaft and DO NOT loosen the bearing adjustment bolt.
13. Remove the grease line and the fitting from the top of the blower pillow block bearing housing.
14. Using a magnet, remove the pin under the fitting, which holds the bearing housing to the bearing.
15. Slidethebearinghousingoffthebearing.
NOTE: Be sure to count the shims removed from under the bearing housing as the same shims MUST be
reinstalled.
16. Remove the drive belts from the blower sheaves and over the bearing.

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Vacuum System Operation
and Maintenance Manual
Belt Installation
1. Install the belts over the blower bearing onto the blower sheaves.
2. Slide the pillow block bearing housing onto the bearing.
NOTE: Be sure the same amount of shims that were removed are reinstalled under the pillow block bearing.
3. Reinstallthepinwhichholdsthebearinghousingtothebearing.
4. Reinstall the fitting and the grease line to the pillow block bearing.
5. Reinstall and tighten the two 5/8" bolts holding the pillow block bearing to the blower frame.
NOTE: Be sure to install the same shims removed and that the bearing housing is tight against the adjustment
bolt.
6. Slide the other end of the belts under the rear jackshaft bearing and over the lower sheave.
7. Reinstall the two 5/8" bolts holding the rear jackshaft pillow block bearing to the drive bearing weldment.
8. Tighten the four 5/8" bolts holding the front and rear jackshaft pillow block bearings to the drive bearing
weldment.
NOTE: Make sure that both bearing housings are tight against the adjusting bolts.
9. Making sure the bolts are in the grooves of the jackshaft sheave, lower the drive bearing weldment down to rest
on the belts.
10. Swing the two turnbuckles back in place and install the two 5/8" bolts.
11. Remove the chain or comealong used to raise the bearing drive weldment.
12. Adjust the belts as per Section B.
13. Tightenthejamnutsonbothturnbuckles.
14. Tighten the two 1" bolts holding the drive bearing weldment to the frame.
15. Tighten the four 5/8" bolts holding both ends of the turnbuckles.
16. Reinstalltheblowerbeltguards.
17. Reinstall the switch key in the truck chassis ignition, start the engine and engage the
blower.
18. Visually check for excessive belt slap and readjust if necessary.
SAFETY NOTE: NEVER run the blower without the belt guards in place.

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Vacuum System Operation
and Maintenance Manual
Notes

Vac-Con Inc.
969 Hall Park Drive
Green Cove Springs, FL 32043
phone: [phone]
FAX: [phone]
www.vac-con.com
Vac-Con part number 691-5001
printed in USA
June 2001