SHARPEN THE LINE-CUTTING BLADE
WARNING:
performing any maintenance on the line-cutting blade.
1. Remove the line-cutting blade from the trimmer guard.
2. Secure the blade in a vise.
3. Wear proper eye protection and gloves and be careful not to cut yourself.
4. Carefully file the cutting edges of the blade with a fine-tooth file or sharpening
stone, maintaining the original cutting edge angle.
5. Reinstall the line-cutting blade onto the guard and secure it in place with the two
screws.
TRANSMISSION GEARS
LUBRICATION
The transmission gears in the cutting
head and power head assemblies need
to be lubricated periodically with gear
grease. Check the gear case grease level
approximately every 50 hours of operation
by removing the two sealing bolts (Fig.
15a, 15b).
If no grease can be seen on the flanks
of the gear, follow the steps below to fill
with gear grease to 3/4 capacity. Do not
completely fill the transmission gear case.
1. Use the included hex key to loosen
and remove the sealing bolt(s).
2. Use a grease gun (not included)
to inject some grease into the bolt
hole; do not exceed 3/4 capacity.
3. Tighten the sealing bolt(s) after injection.
56-VOLT LITHIUM-ION COMMERCIAL 17.5" STRING TRIMMER — STX4500/STX4500-FC
Always protect your hands by wearing heavy gloves when
15a
Cutting Head Assembly
Sealing
Bolt
15b
Power Head Assembly
Sealing Bolt
43