Operating Instructions

Auxiliary Engine Starting and Stopping Instructions

Turning the Engine On

1. With cold conditions, pull out choke.
2. Pull throttle out 1/4 of the way.
3. Turn key to the "on" position and turn over engine.
4. Push in choke slowly as the auxiliary engine warms up to operating temperature.

Turning the Engine Off

1. Push throttle down and let engine idle for a few moments.
2. Turn key to the "off" position.

RPM Setting

Upon delivery, the engine governor is set at a maximum of 2400 RPM. However, the operator should not pull the throttle all the way out except for difficult sweeping tasks. Under most sweeping conditions, a setting of the throttle at 1800 RPM is sufficient to provide excellent sweeping performance.

Note: Ensure that all water and light switches are switched to the off position when done sweeping.

Dust Control System

Water is the best way to reduce dust for an air sweeper. A high pressure mist inside the hopper aids in dust suppression. Extra nozzles may be installed as desired. The Dust Control System has a valve that directs water to where it is needed most. This may be adjusted to your sweeping needs.

If the system becomes plugged, the nozzles may be removed and the obstruction cleared. If the water flow is properly set, mud inside the hopper may be prevented. Adjust the flow to mist inside the hopper rather than to flow. The mist will follow the air pattern inside the hopper and fan housing a reduce the dust rather than to collect underneath the nozzle.

Additional water spray accessories may be purchased from the Masco Parts Department. Many operators fail to understand the water system and complain about dust. Air sweepers can sweep virtually dust free if proper procedures are followed. For extended dust free sweeping, additional water tanks may be required. Added time and maintenance must be accounted for when sweeping dust free. Dust bags are also available that fit over the fan housing output duct that also reduces dust.

Lights

Switch the control panel light switch to the "on" position when sweeping. This activates the amber warning light and it should be used night or day whenever sweeping.

Sweeping Head

To lower the sweeping head:

• For electric winch type head lift: Push the head switch to the "down" position until the head touches the ground and release the switch.
• For hydraulic type head lift: Start the auxiliary engine. Push the head switch to the "down" position until the head touches the ground and release the switch.

Examine the drag shoes to see if they are adjusted properly. (see "Drag Shoe Adjustment)

Air Circulation Control

The Air Damper Control is located on top of the fan housing. It is a dampening mechanism which allows the operator to adjust the sweeper's air flow. When shut, the air being pushed through the sweeping head is increased. This is good for wet weather applications. When the damper is set to the halfway open mark, the suction at its optimal level. If the damper is set too far open, turbulence is created that reduces the sweeping power of the unit. One option is to let the damper remain free as it will adjust to sweeping conditions.

Gutter Broom

The gutter broom assembly is hydraulically driven and electrically raised and lowered.

To use the gutter broom:

1. Turn on the auxiliary engine.

2. Push gutter broom switch to the "down" position until the gutter broom rests on the ground.

3. Push the gutter broom switch to the "on" position.

Note: Gutter brooms are usually only used to clean gutters and curbs and are not to be used for open area sweeping. The normal sweeping speed for an open area may cause damage to your gutter broom assembly.

Dumping

1. Back sweeper up against a dumpster that is a maximum of sixty (60) inches.

2. From the outside of the sweeper above the gutter broom on the frame, push and hold the dump switch in the "up" position.

3. When the hopper is 3/4 the way, pull the tailgate release chain and continue to raise the hopper until at its full height and release the switch.

4. Clean the hopper. Use a scraper to scrape the bottom of the hopper.

5. Push and hold the dump switch in the "down" position until the hopper is in position. If the sweeper is a center head, reposition the hat on the sweeper head.