13
NOTE: When locating the position of the least amount
of play, or tightest gear mesh, the smaller the angle the
saddle is rotated, the more precise the position can be
pinpointed.
5. Remove the plastic DEC motor housing by unscrewing
the three screws shown in
Figure 23, using a Philips
screwdriver and a 2mm Allen key.
6. Now with a 3mm Allen key loosen by a quarter turn only
the two screws that connect the DEC motor to the seat
plate as shown in
Figure 24. These two screws are
located diagonally across the motor; only one is visible
in the figure. (For a very small DEC adjustment, you can
skip this step.)
7. With a 4mm Allen key, unscrew the four screws at the
bottom of the worm gear housing a quarter or half turn
only, as shown in
Figure 25. Do not over-loosen these
screws!
8. Now with the same Allen key completely remove the
three cover screws on the front of the DEC housing
(
Figure 26). These screws are cosmetic only. Once they
are removed you will be able to get to the Allen screws
inside the housing, which are the ones used to actually
adjust the gear mesh.
9. Adjust the three screws as shown in
Figure 27 to change
the gear mesh of the DEC worm and ring gear:
To TIGHTEN the mesh (REDUCE the backlash), first
loosen the center screw just a little bit by turning it
counterclockwise. Then tighten the outer two screws
evenly by turning them clockwise.
Figure 27:
The three backlash adjustment screws are set
deep inside the housing. The outer two are adjusted with
a 4mm Allen key while the center screw requires a 2.5mm
key. Be sure to follow the proper procedure in the text! Do
not over-tighten any of the screws or you could damage
the gears!
Figure 23:
Removing the Dec motor housing is done by
unthreading two Philips screws (
a
) and one Allen screw (
b
).
Figure 26:
Completely remove the three cosmetic cover
screws on the front plate and set them aside.
Figure 24:
Loosen by a quarter turn the two diagonally
opposed screws that fasten the motor to the seat plate.
Figure 25:
Loosen the four Allen screws underneath the
DEC worm gear housing by no more than ½ turn, to allow
the worm block to move during the adjustment process.
Philips
screws
a.
b.
Allen
screw
