SCRUB SYSTEM 39Service Manual – Advenger, 2800ST, 3800ST, BR 755, BR 855
Scrub Deck Lift Actuator Drive Nut Adjustment -
Advenger / BR 755, 855 Disc and Cylindrical
WARNING!
1 Open the battery compartment and disengage the red
Anderson battery connectors.
2 Connect the Scrub Deck Lift Actuator (completely
assembled) to the Actuator Power Cord Adapter 56407502
(see “Diagnostic and Service Tools”).
3 Connect the red alligator clip to the positive battery terminal.
4 Connect the black alligator clip to the negative battery
terminal.
5 Hold onto the plastic Spring Housing (F) /Drive Nut
assembly and press the rocker switch to run the motor and
retract the nut towards the motor housing (the IN or Retract
Limit).
6 Measure the position of the Spring Housing Guide (B) in
reference to the shoulder as shown in the gure below.
7 Manually turn the plastic Spring Housing (F) assembly until the position measure matches the gure below.
8 Hold the Spring Housing and press the rocker switch, running the motor until it stops but no further than 4” from the shoulder as
shown in the gure below or damage to the Housing may occur.
9 If the measurement doesn’t match 3.94” (100.08mm) as shown below, pry off the black cover (H) to access the Cam Adjuster.
Using a 1/2” socket, gently turn the adjuster CW to increase travel, CCW to decrease travel of the Drive Nut. Each click of the adjuster will
change the nut travel by 0.09” (2.29mm) or just under 3/32”.
10 After each adjustment, re-check the travel by holding the Spring Housing/Drive Nut assembly and running the actuator IN and OUT,
checking against the values below.
11 Repeat until it is set correctly and replace the Cam Adjuster cover (H).
FIGURE 19
FIGURE 18
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