DR Power Walk-Behind Pro (2000 - 2001) - Manual (Page 34)

DR
®
TRIMMER/MOWER
™
Assembly & Operating Instructions 28
To Adjust the Belt Tension through the Trimmer Control
Cable
If the trimmer head stops spinning when the bail bar is engaged and the machine is operating
under a heavy load, the belt may be too loose and the trimmer control cable may need to be
adjusted to put more tension on it.
When the trimmer control cable is properly adjusted, you should begin to feel tension on the
clutch control lever when it's pushed about half way down. If you feel tension before halfway,
the belt is too tight. If you don't feel tension until past the half way point the belt is too loose.
Before making any adjustments to the trimmer control cable, check that the belt is mounted on
the correct side of the idler pulleys (see Figure 45), and is not frayed, worn or stretched.
WARNING! Before performing any maintenance procedure, the engine should be stopped
and the spark plug wire disconnected.
Tools Needed:
• (2) 1/2" open-end or adjustable wrenches, or pliers
To adjust the belt tension through the trimmer control cable (Figure 48), you may find it easier to
set the trimmer up on a workbench, or, after draining the gas and oil from the engine, tip the
machine back on the handlebar.
To increase tension on the belt:
1. With a wrench or pliers, loosen the
control cable adjustment nut in front
of the frame, leaving about 1/8" of
space between nut and frame (Figure
49).
2. Grip the metal end of the black cable
with pliers, making sure you DO NOT
pinch it. At the same time, tighten the
rear nut until it is flush and snug
against the frame. The parts will then
be in the same position as in step 1,
but 1/8" to the right (Figure 49).
If the trimmer head keeps spinning after
the bail bar is released the belt may be too
tight.
To decrease tension on the belt:
Repeat the above steps, except this time
loosen the rear nut, then tighten the front
nut.
Figure 48
Figure 49