EMAK GS35, MT350, GS350, MT3500 Workshop Manual
WORKSHOP MANUAL
Chainsaw
GS35 – GS350 – MT350 – MT3500
General failures’ analysis
GS35 – GS350 – MT350 – MT3500 chainsaws
Suggested tools
General failures’ analysis
I.
II .
II I. Electronic tachometer: for 2 and 4 stroke engines, measurement range from 100 to 30,000 RPM
I.
Emak tool kit
Compression tester: to check thermal group
II.
p/n 3055125
III.
p/n 001000785
GS35 – GS350 – MT350 – MT3500 chainsaws
p/n 001000392A
Index
General failures’ analysis
1) Performance
a) Compression test
b) Cylinder and piston inspection
c) Cylinder and piston assembly
d) Cooling system cleaning
e) Muffler inspection
2) Fuel system
a) Fuel and fuel filter inspection
b) Fuel system test
c) Tank breather inspection
d) Engine seal test
e) Manifold inspection
3) Ignition system
a) Starter housing inspection
b) Spark plug inspection
c) Spark test
d) Flywheel-coil air gap inspection
e) Flywheel key inspection
4) Oil pump, bar and shock absorber
a) Oil tank breather inspection
b) Sprocket inspection
c) Chain brake inspection
d) Oil pump and oil filter inspection
e) Worm gear inspection
f) Shock absorber replacement
g) Lubrication and bar maintenance
5) Tuning
a) Air filters inspection
b) Needle valve inspection
c) Carburetor inspection
d) Suggested tools for carburetion setting
e) Carburetion tuning
6) Tightening torques
7) Trouble shooting
a) The engine does not start
b) Low performance
c) Additional problems
GS35 – GS350 – MT350 – MT3500 chainsaws
1) Rendimento
General failures’ analysis
a) Compression test
b) Cylinder and piston inspection
c) Cylinder and piston assembly
d) Cooling system cleaning
e) Muffler inspection
a) Compression test
•
Apply the Emak compression
tester (I) on cylinder. Pull
energetically the rope 10 times
•
Verify that the compression
value in not less than 7,5 bar –
110 psi
•
If the value in higher than
7,5 bar – 110 psi, start
inspection d), if lower, carry on
with inspection b)
I
p/n 001000392A
GS35 – GS350 – MT350 – MT3500 chainsaws
b) Cylinder and piston inspection
•
Verify the diamond scoring on piston and the nickel-lining on cylinder.
Replace if necessary
•
Verify the piston rings wear using feeler gauge (gap max 1,0 mm)
Warning: during assembly
make sure the circlip has the
feet pointing up
General failures’ analysis
Attention: de-grease the contact surfaces of the
cylinder and the cover. Use a liquid gasket to re-seal,
be careful with the quantity so it does not pollute
internal engine parts
GS35 – GS350 – MT350 – MT3500 chainsaws
c) Cylinder and piston assembly
Warning:
The arrow on the top of the cylinder points towards
the exhaust port.
General failures’ analysis
Tightening torque cylinder - screws
0,6 Kgm (52,08 in lb) + Loctite 243
The arrow must point towards the exhaust.
GS35 – GS350 – MT350 – MT3500 chainsaws
Warning:
d) Cooling system cleaning
Dismount the cylinder's cover. Blow, with
compressed air, cylinder fins, starter case and
flywheel
Important:
• Clean weekly the cooling system, more
frequently in heavy duty work conditions
• Use Loctite 243 to tighten plastic component
Tightening toque cover-basement
0,4 kgm (34,72 in lb) + Loctite 243
General failures’ analysis
Tightening torque
Cover
0,4 kgm (34,72 in lb)
+ Loctite 243
GS35 – GS350 – MT350 – MT3500 chainsaws
e) Muffler inspection
Catalytic muffler
Verify the conditions of the muffler (dirt / oily)
change if necessary
Non-catalytic muffler
If the muffler is blocked or damaged, clean or replace it
General failures’ analysis
Tightening torque cover muffler-muffler
0,6 kgm (53,10 in lb) + Loctite 243
GS35 – GS350 – MT350 – MT3500 chainsaws
Back to index
2) Fuel system
a) Fuel and fuel filter inspection
b) Fuel system test
c) Tank breather inspection
d) Engine seal test
e) Manifold inspection
a) Fuel and fuel filter inspection
•
Verify fuel quality odor
•
Dismount and check periodically the fuel filter
and the sintered internal filter. In case of dirt or
oxidation, replace it
General failures’ analysis
Sintered
internal
filter
b) Fuel system test
•
Apply the pressure gauge at the fuel line. Check
any possible leakage at 0,5 bar
•
If the pressure is not stable, it may indicate
worn fuel system or loose at the carburetor
parts
Go to
Carburetor inspection
GS35 – GS350 – MT350 – MT3500 chainsaws
General failures’ analysis
c) Tank breather inspection
•
Dismount the breather and check the components
•
Apply the pressure gauge (I), supplied with Emak tool kit, at the breather valve and verify the correct
working in both ways. Replace or clean if necessary
I
p/n 1043900
Breather sealing test:
0,2 – 0,3 bar
Breathing system test:
0,00 bar
GS35 – GS350 – MT350 – MT3500 chainsaws
Loading...