Landoll 7450 VT Plus Operator's Manual page 68

OPERATION AND MAINTENANCE
2. The hydraulic system is not filled with oil and should
be purged of air before transporting and field
operations. Carefully hitch the VT Plus to the tractor
and connect the hydraulic lift hoses. Check to make
sure the tractor hydraulic reservoir is full of the
manufacturer's recommended oil. Slowly raise the
machine, and continue to hold the hydraulic lever
until all lift cylinders are fully extended. Lower and
raise the unit to verify that all cylinders are working
simultaneously throughout the stroke. If the cylinders
are not working evenly or together, fully extend the lift
cylinders and continue to hold the lever to purge any
remaining air. Do not loosen any hoses or fittings.
Recheck tractor reservoir to make sure it is within
operating limits.
3. Always fully extend the cylinders and hold the lever to
ensure the cylinders are rephased before starting
any field operation. This will keep all cylinders in time
and frame sections level when operating.
4. The transport locks for the hydraulic lift system are
plumbed into the fold system. During folding they are
activated to lock the machine up in the fully raised
position, while unfolding the locks are released
permitting the machine to be lowered.
NOTE
If performing service or repair work, activate the fold to
engage the transport locks, or lower the machine down to
the ground and relieve hydraulic pressure.
4-4
3-1/4 X 8 HYDRAULIC
CYLINDER
TRANSPORT
LOCK
7450-transport-extended
Figure 4-3: Installed Transport Locks
3-1/4 X 8 HYDRAULIC
CYLINDER
TRANSPORT
LOCK
7450-transport-lock-retracted
Figure 4-4: Stored Transport Locks
3-1/2 X 8 HYDRAULIC
CYLINDER
3-1/2 X 8 HYDRAULIC
CYLINDER
F-607-0818