JLG 450AJ ANSI Service Manual - Manual (Page 98)

SECTION 2 - PROCEDURES
2-80 – JLG Lift – 3120749
sure is inadequate, shut down and determine the cause
for improper pressure.
INADEQUATE CHARGE PRESSURE WILL AFFECT THE OPERA-
TOR’ S ABILITY TO CONTROL THE MACHINE.
Shut down the engine and connect the external control
input signal. Also reconnect the machine function(s), if
disconnected earlier. Start the engine, checking to be cer-
tain the pump remains in neutral. With the engine at nor-
mal operating RPM, slowly check for forward and reverse
machine operation.
Charge pressure may slightly decrease during forward or
reverse operation. Continue to cycle slowly between for-
ward and reverse for at least five minutes.
Shut down engine, remove gauges, and plug ports.
Check reservoir level and add filtered fluid if needed.
The machine is now ready for operation.
2.35 SEMI-TRACK
The semi-track option is available in either soft or hard
track configurations. The semi-track provides increased
traction in rough terrain applications.
Testing the Track
With both sides installed, drive the machine slowly in both
directions to see that the track does not catch or hit any
part of the machine. Test the machine until it can be driven
at top speed and on side slopes without the tracks hitting.
In the first few days after use, check the track frequently to
see that all bolts are staying tight and that no damage is
being caused to the tires or machine.
Removing the Track
If the tracks are muddy, it is a good idea to wash them off
or drive the loader through water before removing. If the
tracks are going to be stored in the laid out position just
as they come off the machine, then move the machine to
the storage area to remove the tracks. If the tracks are
going to be rolled up and put on a pallet, it is best to
remove them on a hard surface. Remove the bolts that
hold the track together. These bolts are accessible over
the front tires. After the nuts are removed, pound them
flush with the pad. Drive the machine ahead until the bolts
are at the bottom between tires. Remove the inside bolts
by turning them out with a wrench and punch out the out-
side bolts. Drive the machine ahead and take off the
tracks. If the track is to be rolled up, it is best to set the
track on edge and roll it. Secure the end of the track and
put the loose hardware in the end of the track.