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42 – English
7.16 Tank unit
Dismantling
1. Drain the fuel from the tank.
2. Dismantle the cylinder cover, bar and chain.
See the Operator's Manual.
3. Unhook the throttle actuator rod (G) from the
carburettor (see gure 45).
4. Dismantle the fuel hose (B) and the fuel pump
return hose (D) (see gure 45).
5. Remove the screws. (A). Loosen the handle
(see gure 46).
6. Dismantle the fuel tank.
NOTE!
Exercise care so that the fuel hose and
throttle cable are not damaged.
Repair instructions
WARNING!
The fuel used in the chain saw has
the following hazardous properties:
1. The fluid and its vapour are
poisonous.
2. Can cause skin irritation.
3. Is highly inflammable.
7.17 Venting the fuel tank
The two-way valve (C) has the following properties
(see gure 47):
• Controlled opening pressure in both directions,
which prevents a positive pressure or a vacuum
developing in the fuel tank and impairing engine
performance. This also prevents fuel leakage.
• Opening pressure outward 100–450 mbar.
• Opening pressure inward (vacuum) max.
70 mbar. (2 positions)
Test
Opening pressure outward:
1. Open the ller cap and let the cap remain open
during the entire test. Drain the fuel from the
tank.
2. Connect the pump, ref. no. 531 03 06-23, to
the tank valve. (C)
3. Switch the pump to vacuum mode.
4. After pumping the indicator should be between
10–45 kPa.
Opening pressure inward:
1. Open the ller cap and let the cap remain open
during the entire test. Drain the fuel from the
tank.
2. Connect the pump, ref. no. 531 03 06-23, to
the tank valve. (C)
3. Switch the pump to pressure mode.
4. After pumping the indicator should stop at max.
7 kPa.
Fig 45
Fig 46
Fig 47
2xE
A
3xA
A