DR Power Walk-Behind Pro (1985 - 2000) - Manual (Page 35)

DR
®
TRIMMER/MOWER
™
Assembly & Operating Instructions 33
To Adjust the Belt Tension through the Trimmer Control Cable
If the trimmer head stops spinning when the brake 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 half way, 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 pulley (see Figure 45), and is not frayed, worn or stretched.
WARNING: Before performing any maintenance procedures, 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 47), 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.
1. With wrench or pliers, loosen the nut in front of the frame, leaving about 1/8" of space between
nut and frame (Figure 48).
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 48).
If the trimmer head keeps spinning after the brake bar is released the belt may be too tight. Repeat
the above steps, except this time loosen the rear nut, then tighten the front nut.
Figure 47 Figure 48