Joyner Dirt Devil SZ250DS 2006, Owner'S Manual And Parts Manual, Page: 19 / 57

a. Press down the shift lever to the “F” position so that the unit can move forward, Pull
back the shift to “N” position so that the unit can’t move because of in the neutral, pull
back the lever to “R” so that the unit can move backward. (See Fig. 5)
b. Loosen nut #1 and #2. Adjust nut #3 can adjust the mesh status inside the reverse
gear box. Make sure the shift lever can be on the three positions (F,N,R) cleanly. Then
tighten the nuts #1, # 2.
Figure 5
E. Shift Adjustment