Self-propelled Chipper Shredder Vacuum
1
ABOUT THIS SECTION:
In model year 2000, MTD introduced a vertical crank-
shaft lawn vacuum with a 22” clearing width and the
capacity to shred small yard debris. Since it’s introduc-
tion, the product has been enhanced with a removable
vacuum hose. The latest product improvement is the
addition of a self-propell feature.
NOTE:
The equipment that was used to write
this section was a prototype. There may be sub-
tle differences between prototypes and produc-
tion equipment.
For the sake of orientation:
•
All engine controls are located on the
engine.(i.e. choke and throttle)
•
The variable speed lever is on the left side of the
handle. This is NOT a throttle control.
•
The variable speed lever will not move easily
unless the engine crankshaft is rotating. Do NOT
force the lever.
•
The control Bail mounted to the handlebar
engages the drive system. It does NOT turn-off
the engine like the blade control handle on a
mower.
1.
SAFETY SWITCH
The safety switch is located at the rear of the unit. The
intent is to make sure that it will not run without a col-
lection bag or blower chute in place. The safety switch
is a normally closed switch. This means that when the
bag or chute are not present, the plunger will be up,
and the contacts within the switch will be closed.
The switch is mounted to the upper impeller housing
assembly. A magneto primary wire connects to one ter-
minal of the safety switch. The other terminal of the
safety switch is connected to a ground wire. When the
collection bag or blower chute is on the unit, the safety
switch plunger will be depressed, and the contacts will
be separated.
NOTE:
A multimeter or continuity tester can be
used for this section.
1.1.
Confirm that the metal tab on the collection bag
or chute depress the plunger far enough to open
the contacts in the switch.
1.2.
Disconnect the switch from the magneto primary
wire at the bullet connector.
1.3.
Check for continuity through the switch, from the
bullet connector to ground. See Figure 1.3.
NOTE:
In figure 1.3, the meter shows continuity
(near 0 ohms). This engine will not start even
though the bag is in place.
Figure 1.3
Self-propelled Chipper Shredder Vacuum
