28 51-3849, 5/26/06
MAINTENANCE SECTION
BRUSH PATTERN/SPRING CHAIN/TRANSPORT CHAIN
Setting Brush Pattern
A properly adjusted brush offers the best sweeper
performance. To check the brush pattern:
1. Move the sweeper to a dusty, flat surface.
2. Set the prime mover’s parking brake and leave the engine
running.
3. Start the sweeper at a slow speed: lower it so the bristle
tips touch the ground. Run the sweeper in a stationary
position for 10 seconds.
4. Raise the sweeper and back away; switch off the engine
and remove the key. The brush pattern left in the dust
should be 2-4 inches (51-102 mm) wide, running the
length of the brush. (Compare the swept area with
figure 22.)
5. Adjust the brush pattern as necessary according to
instructions found in adjusting the Spring-Chain
Assembly.
Adjusting Spring-Chain Assembly
The spring-chain assembly allows the brush head to pivot up
and down.
To adjust the brush pattern:
1. AH/CH - Raise the sweeper.
RLH/RLCH/LOADER - Lower the sweeper.
2. Tighten the transport chain and lower the sweeper so the
transport chain supports weight.
3. Move the spring chain forward in the swing assembly
chain holder to lower the brush head or backward in the
holder to raise it.
Tightening Transport Chain
The transport chain supports the weight of the brush head
assembly during transport between work sites and during
adjustment of the spring-chain assemblies.
To adjust the transport chain:
AH/CH/RLH/RLCH
1. Raise the sweeper.
2. Tighten the transport chain.
3. Lower the sweeper so the transport chain supports the
weight of the sweeper.
Loader
1. Extend tilt cylinders.
2. Tighten the transport chain.
3. Retract tilt cylinders.
Swept Area
2-4 in.
(51-102 mm)
Figure 22
