Page 54 December 2007
SJ 46A & SJ 46AJ
Winching and Towing Procedure Section 2 - Operation
2.13-1 To Release Brakes Manually
Brakes must be manually disengaged for winching or
towing.
WARNING
Do not manually disengage brakes if
aerial platform is on a slope.
1. Ensure aerial platform is on level ground. Chock
or block wheels to keep aerial platform from
rolling.
2. Turn main power disconnect switch to “
” off
position.
CAUTION
Do not use hydraulic power with brake
disengaged.
3. Locate the bypass valve on the inboard side of the
drive pump. Bypass the drive pump by loosening
the valve stem (item 1 - marked with yellow paint)
two revolutions counterclockwise.
1
Figure 2-13. Drive Bypass Valve
CAUTION
Do not release brakes before disengaging
drive motor!
4. Push in black brake valve plunger (item 2).
2
3
Figure 2-14. Brake Manifold
5. Actuate red hand pump (item 3) slowly by moving
knob in and out until firm resistance is felt. Brake
is now released.
WARNING
Brakes must be applied immediately
after reaching desired location. Refer
to Section 2.13 on how to reengage
brakes.
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