Skyjack SJ85AJ, Operating Manual

Page: 64 / 106

208932AEA SJ85AJ
64
Section 6 – Additional Procedures Winching and Towing Procedures
6.1-1 To Release Brakes Manually
Brakes must be manually disengaged for winching or
towing.
WARNING
Do not manually disengage brakes if MEWP is on
a slope.
1. Ensure MEWP is on level ground. Chock or
block wheels to keep MEWP 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) 90 degrees clockwise.
Figure 22 Drive Bypass Valve
CAUTION
Do not release brakes before disengaging drive
motor!
4. Push in black brake valve plunger (item
3
).
Figure 23 Brake Manifold
5. Actuate red hand pump (item 1) slowly by
moving knob in and out until pressure gauge
(item 2) (if equipped) registers 300 psi/21
bar. DO NOT exceed 350 psi/24 bar. Brake is
now released. If MEWP is not equipped with
a pressure gauge, refer to the Service manual
for instructions on how to install the pressure
gauge.
WARNING
Brakes must be applied immediately after reaching
desired location. Refer to
Section 6.1 on how to
reengage brakes.
1
1
2
3