Wacker Neuson BTS 930-8340 Mode d'emploi
www.wackergroup.com
Cut-Off Saws
BTS 930-8340
BTS 935-8341
BTS 1030-8339
BTS 1035-7975
REPAIR MANUAL
0118754en 005
0903
0118754EN
BTS Repair Table of Contents
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1. Technical Data 5
1.1 BTS 930 / BTS 935 / BTS 1030 / BTS 1035 ........................................ 5
2. Special Tools 6
3. Clutch 7
3.1 Dismantling the clutch/drum ................................................................. 7
3.2 Mounting muffler and heat plate ........................................................... 8
3.3 Repairing the clutch .............................................................................. 8
3.4 Mounting the clutch/drum ..................................................................... 9
4. Ignition System 10
4.1 Checking the spark plug ..................................................................... 10
4.2 Replacing the plug connector ............................................................. 11
4.3 Removing/assembling the ignition / short circuit cable ....................... 12
4.4 Removing/checking/mounting the ignition armature .......................... 14
4.5 Removing/mounting the flywheel ....................................................... 15
5. Starting System 16
5.1 Removing/mounting the starter / return spring ................................... 16
5.2 Pretensioning/checking the return spring ........................................... 17
5.3 Replacing the starter ratchet .............................................................. 17
6. Carburetor 18
6.1 Setting the carburetor ......................................................................... 18
6.2 Removing the carburetor and intake hose ......................................... 19
6.3 Carburetor - dismantling/testing the control side ................................ 20
6.4 Carburetor - dismantling/testing the pump side .................................. 21
6.5 Carburetor - Cleaning the fuel filter .................................................... 21
Table of Contents BTS Repair
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7. Hood System / Air Filter / Winter Operation 22
7.1 Air Filter ...............................................................................................22
7.2 Winter Operation .................................................................................23
8. Front Handle / Vibration Absorbers 24
8.1 Removing and replacing the bracket handle .......................................24
8.2 Replacing the vibration absorbers .......................................................24
9. Fuel Tank / Fuel Filter 25
9.1 Removing/inserting the ventilation valve .............................................25
9.2 Replacing the throttle lever mechanism ..............................................25
9.3 Replacing the fuel pipe ........................................................................26
9.4 Testing the fuel filter ............................................................................26
10. Cylinder / Piston / Decompression Valve 27
10.1 Dismantling/mounting the cylinder / piston ..........................................27
10.2 Testing the decompression valve ........................................................28
11. Crankcase / Crankshaft 29
11.1 Crankcase / crankshaft ........................................................................29
12. Cutting Attachment 30
12.1 Replacing the pressure disc ................................................................30
12.2 Removing / mounting the V-belt pulley ................................................30
12.3 Replacing the drive axle ......................................................................31
12.4 Removing the complete pressure ring .................................................31
12.5 Cutter guard holding attachments .......................................................31
12.6 Replacing the guard stop ....................................................................32
12.7 Replacing the fixing screw ...................................................................32
BTS Repair Table of Contents
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12.8 Removing / mounting the cutting device bearings .............................. 33
12.9 Adjusting the cutter guard holding attachment ................................... 34
12.10 Tensioning the V-belt ......................................................................... 34
13. Torques 35
13.1 BTS 930 / BTS 935 / BTS 1030 / BTS 1035 ...................................... 35
Table of Contents BTS Repair
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BTS Repair Technical Data
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1. Technical Data
1.1 BTS 930 / BTS 935 / BTS 1030 / BTS 1035
Item No. BTS 930
0008340 BTS 935
0008341 BTS 1030
0008339 BTS 1035
0007975
Saw
Displacement cm³ (in³) 62 73
Bore mm (in.) 47 (1.8) 50 (2.0)
Stroke mm (in.) 37 (1.5) 37 (1.5)
Max. Power kW (Hp) 3.3 (4.4) 4.2 (5.5)
Max. Torque Nm 4.0 5.0
Idling Speed rpm 2500 2500
Clutch engagement speed rpm 3800 3800
Engine speed limitation rpm 9350 9350
Max. spindle speed rpm 4300 4300
Carburetor (diaphragm) type Tillotson HS-273 A
Ignition system
(with speed limitation) type electronic
Spark plug type NGK BPMR 7A / BOSCH WSR 6F /
CHAMPION RCJ 6Y
Electrode gap mm (in.) 0.5 (0.020)
Fuel consumption1) l/h (qts./h) 1.85 (2) 2.36 (2.5)
Specific consumption1) g/kWh 500 500
Fuel tank capacity l (qts.) 1.1 (1.2) 1.1 (1.2)
Mixture ratio (fuel/two-stroke oil) 50:1 50:1
Cuttingdiscfor80m/sec. 2)
(DSA approved) mm 3) 300/20.0/5 350/24.5/5 300/20.0/5 350/24.5/5
Arbor diameter mm 20.0 25.4 20.0 25.4
V-belt AVX 838 LA AVX 838 LA
Overall weight 4) kg (lbs.) 9.7 (21) 9.9 (22) 9.8 (21) 10 (22)
1) At max. load per ISO 8893
2) Circumferance speed at max. engine speed
3) Outside diameter / arbor hole / thickness
4) tanks empty, without cutting disc.
Special Tools BTS Repair
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2. Special Tools
Ref. Part Number Description
1. 0068900 Puller for flywheel
2. 0117570 Puller for oil seals
3. 0117573 Puller for ball bearing counter support
4. 0117569 Puller for ball bearing inside puller
5. 0117575 Set of piston ring tenson belt
6. 0117571 Piston stop wedge
7. 0117574 Mounting tool for clutch hub
3
4
5
6
12
7wc_gr001381
BTS Repair Clutch
wc_tx000298gb.fm 7
3. Clutch
3.1 Dismantling the clutch/drum
See Graphic: wc_gr001384 and wc_gr001385
3.1.1 To dismantle the clutch and drum, remove the cutting device (1), strut
(2) and V-belt cover (3).
3.1.2 To remove the cutting device, loosen the fixing screws (4). Remove
screw (5) to the point where the end of the screw projects from the
cover (arrow).
3.1.3 The side strut is fixed with 3 screws (7) to the tank and the collector for
the right upper damper device.
3.1.4 The cover for the V-belt is fixed to the crankcase with 3 screws (8).
3.1.5 To remove the clutch and drum, the piston must beblocked. Todo this,
unscrew the 3 screws (9) fixing the muffler (10) and insert the piston
stop wedge (0117571) into the exhaust port of the cylinder (11).
3.1.6 Unscrew the clutch with the special tool (0117574) and a 19mm
wrench (a).
Note: left-handed thread.
7
4
2
1
3
5
wc_gr001384
9
11
a
8
10
wc_gr001385
Clutch BTS Repair
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3.2 Mounting muffler and heat plate
See Graphic: wc_gr001386
When mounting the muffler (10) ensure that the heat plate (12) is
installed correctly.
Note: The heat plate goes directly onto the cylinder, then the gasket
(13) and muffler.
3.3 Repairing the clutch
See Graphic: wc_gr001386
3.3.1 The tension springs of the clutch can be removed/ replaced with
pointed pliers (b). If spares are required, the 3 tension springs are only
available as individual parts.
3.3.2 The tension springs should only be replaced as a set if replacement is
required.
3.3.3 If the hub / flyweight is defective, the complete clutch must be
replaced.
wc_gr001386
b
1
1212
1
13
1
1
1010
Ce manuel convient aux modèles suivants
3
Table des matières
