If the saw chain lubrication does not work after
completing the steps above, turn to your servicing
dealer.
To do a check of the chain drive sprocket
The clutch drum has a spur sprocket (A) or a rim
sprocket (B). A spur sprocket has the chain sprocket
permanently attached to the clutch drum. A rim sprocket
can be replaced.
(Fig. 124)
• Regularly examine the chain drive sprocket for wear.
Replace the chain drive sprocket if there is too much
wear.
• Replace the chain drive sprocket when you replace
the saw chain.
To lubricate the needle bearing
Both versions of sprockets have a needle bearing on the
drive shaft, which has to be greased regularly (once a
week).
1. Disengage the chain brake by pulling the front hand
guard against the front handle.
2. Unscrew the two bar nuts and remove the clutch
cover.
3. Lay the product on its side with the clutch drum
facing upwards.
4. Remove the clutch drum and lubricate the needle
bearing using a grease gun. Use a high-quality
bearing grease or engine oil. (Fig. 125)
To examine the cutting equipment
for wear
Do a visual check of the saw chain daily.
1. Make sure that there are no visible cracks in rivets
and links.
2. Examine wheather the saw chain is stiff.
3. Compare the existing saw chain with a new saw
chain to decide wheather the rivets and links are
badly worn.
4. Replace the saw chain if it exhibits any of the
conditions above.
5. Replace the saw chain when the length of the cutting
teeth has worn down to only 4 mm.
To do a check of the guide bar
Do a check of the guide bar regularly.
1. Examine whether there are burrs on the edges of the
bar. Remove burrs with a file if necessary.
2. Examine whether the groove in the bar has become
badly worn. Replace the bar if necessary.
3. Examine whether the tip of the bar is uneven or
badly worn. If a hollow forms on the underside of the
bar tip this is due to running with a slack chain.
4. Turn the bar daily to prolong the life of the bar.
Cooling system
The product is equipped with a cooling system to keep
the working temperature as low as possible. The cooling
system consist of the following components:
• Air intake on the starter.
• Air guide plate.
• Fins on the flywheel.
• Cooling fins on the cylinder.
• Cylinder cover (directs cool air over the cylinder).
(Fig. 126)
Clean the cooling system with a brush once a week or
more often in demanding conditions. A dirty or blocked
cooling system causes the product to overheat which
results in damage to the piston and cylinder.
Centrifugal cleaning system
Centrifugal cleaning means that the air to the carburettor
passes through the starter. Dirt and dust is centrifuged
out by the cooling fan.
(Fig. 127)
In order to maintain operation of the centrifugal cleaning
system it must be regularly maintained. Clean the
following components:
• The air intake on the starter.
• The fins on the flywheel.
• The space around the flywheel.
• The inlet pipe.
• The carburettor compartment.
Maintenance schedule
The following is a list of the maintenance steps that must
be performed on the product. Most of the items are
Maintenance on page 30
Daily maintenance
Weekly maintenance
Monthly maintenance
Clean the outside of the machine.
Check the cooling system weekly.
Check the brake band on the chain
brake for wear. Replace when less
than 0.6 mm (0.024 inch) remains at
the most worn point.
272 - 008 -
35
Summary of Contents for GZ381
Page 2: ...1 2 3 4 5 6 7 8 9 10 11 yyyywwxxxxx 12...
Page 3: ...13 14 15 16 17 18 A B 19 C D 20...
Page 4: ...21 22 23 24 25 A B 26 27 28...
Page 5: ...29 30 31 PITCH D D 2 32 33 PITCH D D 2 34 35 36...
Page 6: ...37 38 39 40 41 42 7 10 9 1 2 3 6 8 4 43 44...
Page 7: ...45 46 1 2 47 48 49 50 51 52...
Page 8: ...53 54 55 56 57 58 59 1 2 3 60...
Page 9: ...61 62 63 64 65 66 67 68...
Page 10: ...69 70 71 1 2 2 1 1 3 72 2 1 73 74 75 76...
Page 11: ...77 78 79 80 81 82 83 84...
Page 12: ...85 86 87 88 89 90 91 92...
Page 13: ...93 94 95 96 97 98 99 100...
Page 14: ...101 1 2 102 A B C D 103 A B 104 105 106 107 0 5 mm 0 020 108...
Page 15: ...A B 109 110 111 112 113 min 4 mm 5 32 114 A B C 115 116...
Page 16: ...117 118 119 120 121 122 123 A B 124...
Page 17: ...125 126 127 128...
Page 40: ...H30 4 8 mm 505 69 81 27 0 65 mm 30 85 SP33G 586 93 34 01 80 40 272 008...
Page 67: ...H30 4 8 mm 505 69 81 27 0 65 mm 30 85 SP33G 586 93 34 01 80 272 008 67...
Page 70: ...12 yyyy ww EU V 80 84 94 70 272 008...
Page 71: ...76 13 14 15 16 272 008 71...
Page 72: ...85 Zenoah 17 18 A 19 C D 20 21 22 23 72 272 008...
Page 73: ...24 25 85 B 26 89 84 27 28 272 008 73...
Page 74: ...29 30 31 3 m 10 ft 74 272 008...
Page 75: ...85 94 Zenoah 94 cm T 32 mm 272 008 75...
Page 76: ...33 34 mm 35 36 1 22 2 37 3 38 4 5 6 89 39 7 40 8 9 41 42 76 272 008...
Page 78: ...4 5 1 Zenoah Zenoah 0 C 32 F 44 1 2 3 45 4 5 3 m 10 ft 1 46 2 1 3 6 2 47 4 5 6 78 272 008...
Page 79: ...48 7 8 9 22 1 46 2 1 3 6 2 47 4 5 6 7 49 8 9 22 1 29 2 272 008 79...
Page 80: ...50 51 52 14 53 54 55 56 57 58 80 272 008...
Page 81: ...59 1 2 60 3 4 1 61 2 3 62 a 63 b 2 3 64 4 65 a 1 3 b 66 5 67 a 1 3 b 68 272 008 81...
Page 82: ...2 1 2 69 83 70 1 71 2 3 135 1 2 3 72 1 1 2 2 73 1 4 45 82 272 008...
Page 83: ...90 74 1 3 5 1 5 2 75 2 3 4 76 5 1 10 77 78 6 79 94 80 81 1 82 2 3 83 4 84 272 008 83...
Page 84: ...5 2 3 2 54 cm 1 in 2 54 5 08 cm 1 2 in 85 6 86 7 5 C Husqvarna T 1 2 84 272 008...
Page 86: ...97 1 2 98 1 2 STOP 29 1 2 99 3 100 1 101 2 30 cm 12 102 3 A B 4 3 5 6 B A 86 272 008...
Page 89: ...88 1 2 116 117 1 118 2 3 119 4 5 120 GZ381 69 1 3 4 20 cm 8 2 1 121 122 123 272 008 89...
Page 90: ...A 124 1 2 3 4 125 1 2 3 4 5 4 mm 1 2 3 4 126 127 90 272 008...
Page 91: ...84 0 6 mm 0 024 in 0 5 mm 272 008 91...
Page 92: ...92 272 008...