Echo GT-2150 Operator's Manual page 23

Flexible shaft
Screw
Bolt
23
LUBRICATING DRIVE SHAFT
(Flexible Shaft)
1. Remove plastic shield.
2. Loosen screw and bolt and remove bearing
housing.
3. Pull the flexible shaft from the drive shaft tube.
4. Wipe shaft clean and recoat it with a thin
costing 10 to 20 g, of lithium base grease.
5. Reverse the above procedure for installation.
CHECKING THE NYLON LINE CUTTING
ATTACHMENT
(1) Make sure each periphery of the 2 retaining pawls
of housing spreads almost fully up to the outer
periphery of the respective cover window.
(2) Check mount of cutting head on trimmer and
tighten if it is loose.
(3) Check the cutter head for deflection or abnormal
noise rotating it by hand.
Deflection or abnormal noise can cause abnormal
vibration to occur or mount to trimmer to loosen
during rotation which is dangerous.
(4) Inspect cover and spool for wear.
When slot apears on cover bottom close to outlet
for Nylon line or when slot appears on the
tap knob of spool, replace with new parts without
fail.
(5) Check the cutting head for crack or chip.
Replace parts that show any crack or chip with
new ones without fail.
GT-2150/2150S