RedMax GZ381 Operator's Manual page 36

To adjust the depth gauge setting
Before you adjust the depth gauge setting or sharpen
To sharpen the cutters on page 35 ,
the cutters, refer to
for instructions. We recommend you to adjust the depth
gauge setting after each third operation that you
sharpen the cutting teeth.
We recommend that you use our depth gauge tool to
receive the correct depth gauge setting and bevel for the
depth gauge.
(Fig. 131)
1. Use a flat file and a depth gauge tool to adjust the
depth gauge setting. Only use RedMax depth gauge
tool to get the correct depth gauge setting and bevel
for the depth gauge.
2. Put the depth gauge tool on the saw chain.
Note:
See the package of the depth gauge tool for
more information about how to use the tool.
3. Use the flat file to remove the part of the depth
gauge that extends through the depth gauge tool.
(Fig. 132)
To do a check of the guide bar
1. Make sure that the oil channel is not blocked. Clean
if it is necessary. (Fig. 133)
2. Examine if there are burrs on the edges of the guide
bar. Remove the burrs using a file. (Fig. 134)
3. Clean the groove in the guide bar. (Fig. 135)
4. Examine the groove in the guide bar for wear.
Replace the guide bar if it is necessary. (Fig. 136)
5. Examine if the guide bar tip is rough or very worn.
(Fig. 137)
6. Make sure that the bar tip sprocket turns freely and
that the lubricating hole in the bar tip sprocket is not
blocked. Clean and lubricate if it is necessary. (Fig.
138)
7. Turn the guide bar daily to extend its life cycle. (Fig.
139)
To do a check of the spur sprocket
The clutch drum has a spur sprocket that is welded on
the clutch drum.
(Fig. 140)
• Regularly do a visual check of the degree of wear on
the spur sprocket. Replace the clutch drum with the
spur sprocket if there is too much wear.
36
To lubricate the needle bearing
1. Pull the front hand guard rearward to disengage the
chain brake.
2. Loosen the bar nuts and remove the clutch cover.
Note:
Some models have only one bar nut.
3. Put the product on a stable surface with the clutch
drum up.
4. Remove the clutch drum and lubricate the needle
bearing with a grease gun. Use engine oil or a
bearing grease of high quality. (Fig. 141)
To do maintenance on the fuel tank
and the chain oil tank
• Drain and clean the fuel tank and the chain oil tank
regularly.
• Replace the fuel filter yearly or more frequently if
necessary.
CAUTION:
causes malfunction.
Air cleaning system
™
AirInjection is a centrifugal air cleaning system that
removes dust and dirt before the particles are caught by
the air filter. AirInjection
and the engine.
(Fig. 142)
To clean the cooling system
The cooling system keeps the engine temperature
down. The cooling system includes the air intake on the
starter (A) and the air guide plate (B), the pawls on the
flywheel (C), the cooling fins on the cylinder (D) and the
cylinder cover (E).
(Fig. 143)
1. Clean the cooling system with a brush weekly or
more frequently if it is necessary.
2. Make sure that the cooling system is not dirty or
blocked.
CAUTION:
cooling system can make the product too
hot, which can cause damage to the
product.
Contamination in the tanks
™
extends the life of the air filter
A dirty or blocked
1284 - 004 - 21.06.2021