Yale MPB045VG Operating Manual page 58

Maintenance
If the truck is equipped with optional display, check start
sequence and fault light. Turn key to ON position. When
the start sequence is complete, battery discharge indicator
lights should show green. If a fault occurs, the fault indica-
tor light flashes red and the LCD displays AL along with the
fault symbol (wrench).
2. Check the operation of the brake sensor. Release the
control handle or delivery handle to allow it to return to the
vertical position. Move the speed/direction control without
lowering the control handle or delivery handle. The traction
system must not operate.
3. Check the operation of the speed/direction control.
Lower the control handle to release the brake. Slowly rotate
the speed/direction control. The lift truck must accelerate
smoothly. Rotate the control in the opposite direction. The
lift truck must stop smoothly and then change direction.
The control must return to the OFF position when release.
4. Check the operation of the lift and lower functions. Push
the lift button and then the lower button. Check that the
forks raise and lower.
5. Check the operation of the traction reverse function.
Slowly rotate the speed/direction control for slow travel in
the control handle or delivery handle direction. Push the
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traction reverse button without changing the position of the
speed/direction control. The lift truck must stop and then
accelerate in the opposite direction. Once the lift truck
changes direction and moves with the control handle or
delivery handle trailing, release the traction reverse button
without releasing the speed/direction control. The lift truck
should not accelerate in the control handle or delivery han-
dle direction. (One the traction reverse button has been
pressed, the traction motor should not accelerate the lift
truck toward the control handle or delivery handle.) Full
direction control may be re-established by rotating the
speed/direction control to the OFF position or moving the
control handle or delivery handle to a brake ON position.
6. Check the steering function. Move the control handle or
delivery handle to the right and left. Check for smooth
movement of the steer (drive) wheel in the same direction.
Steering will be more difficult if the lift truck is stopped.
7. Check the operation of the creep speed button. Move
the control handle or delivery handle to the vertical position.
Press and hold the Creep Speed button while rotating the
direction/speed control. The truck should operate at only
1.6 km/h (1 mph). Lowering the control handle or delivery
handle will maintain the creep speed until the button is