Test Frame Leveling And Level Indicator; Test Boom Interlock - Skyjack SJ643 TH Operating Manual

Function Tests
Standard Multi-functional Joystick
4
4.3-6 Test Frame Leveling and Level
Indicator
1. Ensure park brake is engaged, boom fully
retracted and below 40°.
2. Tilt the frame to the right by pressing and
holding frame level enable switch
moving the joystick to the right.
Result: Frame should tilt to the right,
▪
and frame level indicator should indicate
movement to the right.
3. Tilt frame to the left by pressing and holding
frame level enable switch and move the joystick
to the left.
Result: Frame should tilt to the left, and frame
▪
level indicator should indicate movement to
the left.
4. Level the machine by pressing and holding
frame level enable switch and moving the
joystick to the right. Frame level indicator should
be at 0°.

4.3-7 Test Boom Interlock

1. Ensure park brake is engaged, transmission
shifter in neutral, boom fully retracted and below
30°.
2. Frame level left and stop when the frame level
indicator (see Figure
than 6°.
SJ643 TH & SJ843 TH
and
4
18) reads over 5° and less
Premium Multi-functional Joystick
(If Equipped)
4
Figure 18 Frame Level Indicator
3. Raise the boom.
Result: boom should raise then stop raising at
▪
40° and the interlock light should illuminate.
4. Frame level left.
Result: Frame should NOT tilt to the left.
▪
5. Frame level right.
Result: Frame should tilt to the right in slow
▪
mode, interlock light should go out, then frame
level function should stop before 5° and the
interlock light should re-illuminate.
6. Level the machine until frame level indicator
reads 0°.
Result: Frame should tilt to the left and
▪
interlock light should go out.
7. Raise the boom above 40°.
Result: Boom should raise fully.
▪
Section 4 – Pre-operation
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