Maintenance and Repair Instructions

The routine maintenance requirements and procedures for each subsystem of the sweeper are described. An engine repair manual is available for your auxiliary engine and may be purchased from the Masco Sweepers Parts Department.

Engine Maintenance

It is very important that the auxiliary engine air filter be cleaned as indicated for the type of filter used or more often if conditions are extreme. If dirt gets into the engine, the engine will be severely damaged and warranty provisions will not apply. Follow the filter cleaning instructions for your type of filter.

Change oil at the minimum after fifty (50) hours of use. Place an appropriate container under the oil drain hose and release the oil drain fitting. Replace the fitting when all the oil is removed and fill the engine with SAE 30 or 10-40 in climates with extreme weather changes. Check the oil level daily.

The auxiliary engine should be cleaned on a regular basis. Special cleaning procedures should be done at least four times a year or more often as conditions dictate. These special cleaning procedures include the removal of the engine's protective cover, and steam cleaning of the engine.

The auxiliary engine manufacturer provides more detailed information contained in this section. However, it is important to emphasize that their air cleaner and oil change recommendations are based on average engine uses. For sweeping equipment, Masco Sweepers strongly recommends the following:

Air Filter Cleaning

• Oil bath type- Rinse with solvent and replace oil daily or after ten (10) hours of use.
• Dry element type- Blow element with compressed air daily or after ten (10) hours of use.
• K&N type filter- Rinse filter with K&N degreaser, blow element with compressed air and let dry daily or after ten (10) hours of use.

Oil Changes

Masco Sweepers suggest that your oil (SAE 30 or 10-40 detergent) is changed every fifty (50) hours. Check oil level daily.

Sweeping Head

It is very important that the drag shoes are properly adjusted so that they wear evenly. It is recommended that the drag shoes be rotated every two months or more often as needed. To rotate the drag shoes, simply unbolt them and turn them around or install them on the opposite side of the head.

Drag Shoe Adjustment

1. Lower head to the a flat surface.

2. Drive forward three (3) to ten (10) feet and stop with the emergency brake on.

3. Examine drag shoe position. If the front or rear portion of the drag shoe is not touching the surface, loosen the bolts until they do and tighten bolts again.

4. Repeat steps 2 and 3 until both drag shoes evenly touch the surface.

• Check all tie rod bolts and brackets weekly to ensure that they are not worn and that they are secured tightly.
• Check safety sway chains on both sides of the sweeping head and repair as needed. Do not allow unit to be operated without safety sway chains in place.
• Check head lift mechanism. Look for wear at head chain connection.
• Check rubber flapping to be sure that it is even with the ground when the head is in the down position. If not, loosen the drag shoes and raise the head until the flapping is even with the surface.

Note:In some cases, the flapping may be worn unevenly. If so, adjust the drag shoes so that the flapping will wear even. If the drag shoes have been adjusted and there is not a sufficient seal, it is time to reflap the sweeping head. The quality of the unit's sweeping is directly related to the quality of the seal created by the flapping.

Sweeping Head Flapping Replacement

1. Remove the tie rod bolts.

2. Disconnect intake hose and pressure hose and all safety chains.

3. Remove the head from underneath the vehicle.

4. Turn over sweeping head and remove all bolts.

5. Lay the old flapping over the new. Spray into each hole with a can of spray paint to mark the new flapping holes.

6. Punch holes in flapping where paint dots appear and install flapping on head.

7. Reinstall sweeping head.

If the sweeping head been bent, the seal will be lost. The head will need to be removed and straightened. If major damage has occurred and it cannot be properly repaired by a welding shop a new head may need to be purchased.

Gutter Broom

When the broom bristles no longer touch the ground, the gutter broom should be replaced. The broom tension spring should be tight enough to keep the broom from jumping and bouncing on the ground. The spring should be set at about 50 lbs. of pull.

Rubber Hoses

All hoses (10", 8", 6", 3") should be rotated 1/4 of turn monthly. Be sure to rotate the same direction each time. Repair cracks and holes with duct tape.

Clean Air Blower

Grease the clean air blower bearing about once a week. Do not overgrease! Overgreasing the clean air blower bearing causes the bearing to prematurely wear. Use only high speed machinery grease.

Fan and Fan Housing

Every six (6) months, inspect the fan and fan housing for rubber coating wear. As a general rule, fans will require rubberization for at least 12-24 months from date of purchase. In sandy or high gravel regions, this time frame will be condensed.

The fan housing may be removed by removing six (6) bolts. With the hopper in the high dump position (always use a safety stop), guide the fan housing up and out from the sweeper with a hoist. If the rubber is worn down to metal, then remove the fan and rubberize. If the rubber lining in the fan housing is severely worn replace with a new strip. Check all fan housing welds and repair as necessary.

Fan Repair

Masco Sweepers manufacturers many types and sizes of fans. Each fan is statically and dynamically balanced and mounted directly to the engine crankshaft. If the facilities, tools, and skills are available, the fan should only be removed by following these procedures:

Fan Removal

1. Remove fan housing as described above.

2. Remove the three (3) 3/8" bolts which fasten the bushing to the fan.

3. Insert two 5/16" SAE bolts into the threaded holes provided in the bushing. Tighten the 5/16" bolts while pulling on the bushing with a gear puller. If a gear puller is not available, use a mallet. Continue this process until the fan is removed.

Note: Take special care to note the position of the fan and the tapered bushing relative to the crankshaft and fan housing motor plate before removing the fan. Use these measurements as a reference when reinstalling the fan. The smaller the gap between the edge of the fan blades and the fan housing, the greater the suction power. However, do not make this distance to close as to risk rubbing.

Fan Installation

1. Place fan on crankshaft.

2. Insert bushing with the crankshaft key in place. Tap bushing onto shaft so the threaded bushing bolts will be flush with the end of the crankshaft when Step 4 is completed. Use measurements taken during fan removal.

3. Maneuver fan onto bushing so that threaded holes on fan line up properly with 3/8" x 1 1/2" bushing bolts. Hand tighten bushing bolts into fan. Check the alignment and positioning and make any necessary adjustments. The distance between the fan housing engine mounting plate and the end of the fan blades once step four is competed should be 6 3/4".

4. Using a rotating method, tighten all three 3/8" bushing bolts to fan. Check measurement.

5. Reinstall fan housing.

Note: When aligning the fan housing on engine mounting plate, ensure that the engine mounting plate is square with the fan housing before the bolts are tightened.

Dust Control System

If the Dust Control System is used on a regular basis, the water tank and system requires flushing once a week.

Dust Control Flushing

1. Open all valves.

2. Turn on pump until the water tank is empty.

3. Spray inside of tank with a pressurized hose.

4. Fill water tank.

5. Turn on pump and check lines and clamps for leaks. Repair as needed.

6. Adjust valves to operating position.

7. Shut off pump and fill tank.

Water pumps can be easily disassembled and cleaned periodically.

Electrical System

Connections should be checked regularly for firmness. Battery cable should be cleaned. All lights, switches, and other electrical system components are available through Masco Sweepers' Parts Department.

Hopper

Make sure to thoroughly clean the hopper and hopper screen. If the hopper screen is not cleaned properly, vacuum is lost. When sweeping heavy sand and gravel, the sweeper must be dumped frequently so as to prevent overloading. The Model 1600 on a Toyota truck should not be loaded with more that 600 lbs. of sand. The high dump position is a good time to inspect the sweeper for foreign debris and dust. Always use a safety device if cleaning under the hopper.

A clean sweeper reflects professional pride and good maintenance. A sweeper that has been used for eight hours is extremely dirty and requires a thorough cleaning. Masco Sweepers recommends the following hopper cleaning procedures:

Daily or after eight (8) hours of use:

• Dump hopper
• Remove hopper screen
• Rinse hopper with pressurized water
• Clean hopper screen and replace
• Rinse of complete sweeper
• Vacuum and dust interior of vehicle cab
• Clean air filter on auxiliary engine if required

Every three (3) days or after twenty-four (24) hours of use:

• Perform Daily cleaning procedure
• Steam clean or high pressure wash auxiliary engine area
• Thorough vehicle wash

Every week or after forty-eight (48) hours of use:

• With an air compressor (if none available, use a gas service station air hose), blow out all dust and dirt around auxiliary engine compressor and radiator.

Note: When using the Dust Control System, caking will occur in the intake hose, hopper, and air channel areas. Ensure the removal of this dirt when cleaning the sweeper.

Truck Service

The service schedule and requirements for the truck are described in the truck manufacturer's operator's manual. However, Masco Sweepers strongly recommends performing certain maintenance procedures more often as follows:

• Oil change: oil change should take place every 2,000 miles.
• Oil filter change: replace oil filter every 4,000 miles.
• Air filter: clean factory standard air filter every 2,000 miles and replace every 8,000 miles.
• Transmission fluid filter: replace every 12,000 miles.
• Lubrication: Lubricate truck every 4,000 miles.
• Check and replace brakes as needed on Toyota truck every 10,000 miles on the front and every 30,000 on the rear.
• Front tires on sweepers usually last only 6,000 to 10,000 miles. Rotate frequently to reduce excessive wear.