DR Power Self-Propelled 6.75 (2004 - September 2010) - Manual (Page 46)

42 DR
®
TRIMMER/MOWER
Adjusting the Trimmer Head Belt Tension through the Trimmer Control Cable - All models
BEFORE PERFORMING ANY MAINTENANCE PROCEDURE OR INSPECTION, STOP THE ENGINE, WAIT FIVE
(5) MINUTES TO ALLOW ALL PARTS COOL. DISCONNECT THE SPARK PLUG WIRE, KEEPING IT AWAY
FROM THE SPARK PLUG.
BEFORE ADJUSTING THE TRIMMER CONTROL CABLE, CHECK THAT THE BELT MOUNTING IS ON THE
CORRECT SIDE OF THE IDLER PULLEYS (SEE
FIGURE 25 ON PAGE 35), AND NOT FRAYED, WORN OR
STRETCHED. ALSO MAKE SURE THE SPRING IS ATTACHED TO THE BAIL BAR ( FIGURE 37 ).
If the Trimmer Head stops spinning with the Bail Bar engaged and
the machine is operating under a heavy load, the Belt may be too
loose. In this case, you may need to adjust the Trimmer Control
Cable to put more tension on it. The Adjuster is located on the right
Handlebar, just above the Throttle Control Lever for the SPRINT
®
,
PRO, and COMMERCIAL models and on the left Handlebar for the
SELF-PROPELLED model.
Tools needed:
•
(2) 1/2" Open-end or Adjustable Wrench
To increase the tension on the belt:
1. Loosen the upper Control Cable Adjustment Nut, leaving
about 1/8" of space between the Nut and Bracket (Figure 37).
2. Gently pull down on the Cable as you tighten the lower Nut
until it is flush and snug against the Bracket (Figure 37).
NOTE: If the Trimmer Head still keeps spinning after releasing the
Bail Bar, the Belt may be too tight or the Brake Arm may
need replacing. See “Brake Arm” on page 37.
To decrease the tension on the belt:
1. Repeat the steps for increasing the tension on the Belt, but
instead, loosen the Lower Nut first and then tighten the
Upper Nut.
NOTE: To check your adjustment, measure the Spring with the Bail
Bar disengaged. Then measure it with the Bail Bar engaged.
There should be a 1/4" extension in the Spring when the Bail
Bar is engaged (Figure 38). Adjust the Nuts on the Bracket
as needed to get the correct measurements.
Figure 37
Bail Bar
Spring
Upper Nut
Bracket
Figure 38
Lower Nut
Metal Cable End
Measure the Bail Bar released
With Bail Bar engaged, should be 1/4" longer