jcb JS200 Service Manual page 466

Section F
6 - 5
* Replacement (continued)
5 Apply grease through the check valve to adjust the
track tension (see Tracks and Running Gear,
Checking/Adjusting the Track Tension, Section 3).
Motor Bleeding
Bleeding must be done whenever a track motor is being
fitted.
Note: If a track gearbox assembly is being fitted to the
machine with the motor attached, follow the procedure given
under Track Gearbox Removal and Replacement.
When the motor is being fitted to a gearbox already fitted to
the machine, bleed the air from the motor by one of the three
methods detailed below.
Note: Method 1 will take considerable time as air in the
motor is very difficult to purge. Methods 2 or 3 may be
quicker.
Method 1
After fitting the motor but before connecting the pipework,
remove plug from upper drain port A but make sure that a
plug is fitted to lower drain port B.
Fill the motor with specified hydraulic oil through port A.
Connect the pipes.
Method 2
Fit the motor and connect all pipes except the two drains.
Remove plug from port A. Make sure that a steel plug is
fitted to bottom drain port B.
Run the engine and operate the track control lever slightly so
that the sprocket does not turn. If necessary, prevent the
sprocket from turning by means of a steel bar or tube
jammed in the track. Return the lever to neutral when air-
free oil flows from port A. Connect the drain pipes.
Method 3
Fit the motor and connect all pipes. Prevent the sprocket
from turning by means of a steel bar or tube jammed in the
track. Run the engine and fully select the track control lever
for about 1 minute. This will fill the motor case with oil.
9803/6400
Transmission
Motor/Gearbox
Section F
6 - 5
Issue 2*