Technical Information · issue 13 of 2002
New drill
IssueTI 13/2002
Full text
Page 1 of 6
Technical Information
13.2002
New STIHL BT 45 drill – Series 4314
Contents
1. Technical description
2. Specifications
3. Drills
4. Set of parts and accessories
5. Service accessories and special tools
6. Service note
7. Spare parts
STIHL BT 45 (for drilling wood) STIHL BT 45 (for drilling planting holes)
The newly developed STIHL BT 45 drill is a multi-purpose machine with a gasoline engine.
TI_13_2002_02_01_01.fm english / USA
)m~ge 2 Technical Information 13.2002
The machine can be adapted to certain applications Gear mechanism
by combining the unit with different handles and
. Gearbox with four gear positions: 1, 2, Reverse,
attachments. For this purpose, adapter sets are
Neutral
optionally available for drilling wood and for drilling
planting holes. This opens up a large range of . Integrated slip clutch
possible uses in the following areas (examples): . Light metal housing
. Building trade, joinery, wood construction (not . Lubricated for life, maintenance-free
in closed premises)
. Landscape gardening (planting)
. Agriculture and forestry 2. Specifications
. Municipal service crews
2.1 Powerhead
. Construction of sports and playground facilities
2.1.1 Engine
1. Technical description
STIHL single-cylinder two-stroke engine
The machine is powered by the "Basic“ 4140 engine Displacement: 27.2 cm3 (1.66 cu. in.)
which is used in many STIHL power tool series
Bore: 34 mm (1.34 in.)
(such as: FS 45, FS 55, FC 55, HS 45, HL 45, BG
45, BG 55, SH 55, SH 85). Stroke: fo
Engine power to
30 mm (1.18 in.)
0.8 kW (1.1 HP)
Cylinder
ISO 8893: @ 7000 rpm
. Four-port technology (better mixture control) Idle speed: 2800 rpm
. Large cooling air surface Rewind starter: Single pawl system
Crankshaft Starter rope: Dia. 3.0 mm,
41 3/4“ (1060 mm) long
. “Built up“ design Clutch: Centrifugal clutch
. Mounted in bearings at both ends Clutch engages at: 4000 rpm
Carburetor
2.1.2 Fuel system
. With three adjusting screws (H, L, LA), H-screw
Carburetor: All-position diaphragm carburetor with
with cap to limit the adjustment range
integral fuel pump
. With manually actuated fuel pump (purger)
Air filter
Low speed adjusting screw L
. Multi-layer (felt, foam)
(standard setting): 1 turn open
Exhaust muffler High speed adjusting screw H
. Two-chamber muffler with spark arresting (standard setting): Open fully
screen (max. 3/4 turn)
Fuel tank capacity: 0.25 l (8.5 oz.)
Clutch
. Three clutch shoes without linings 2.1.3 Ignition system
Fuel tank Ignition module: With integrated electronic
. Integrated into the housing for protection speed limiter
. Fuel filler cap can be opened and closed without Spark plug
tools (suppressed): NGK BPMR 7 A
Electrode gap: 0.5 mm (.020 in)
Vibration damping
. AV system with four rubber buffers
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Technical Information 13.2002 Page 3
2.2 Gearbox The planting hole drills are made for planting
Type: Spur gear, straight-toothed applications only. Drill heads and cutters can be
replaced when worn and the cutters reversed. The
Switch Transmission Spindle speed at drills are available in the following sizes:
position ratio n = 7000 rpm
(in rpm)
1 11.3 : 1 620 Planting hole drills Part No.
2 3.8 : 1 1840 Dia. 75 mm (3"), 595 mm
R 12.7 : 1 550 (reverse gear) (23“) long 4314 680 1903
N Neutral position (idle) Dia. 100 mm (4"), 595 mm
(23“) long 4314 680 1904
2.3 Weight Dia. 127 mm (5"), 595 mm
Without set of parts and drill: 10.6 lbs (4.8 kg) (23“) long 4314 680 1905
2.4 Dimensions
Importand note: planting hole drills are designed to
Without set of parts and drill
be used for drilling shallow planting holes in loose,
Length 17.5 in. (445 mm) cultivated soil. Do not use as an earth auger (e.g.
Width 9.1 in. (230 mm) drilling post holes). Any such use will lead to
accelerated wear and premature failure of the
Height 9.1 in (230 mm)
planting hole drill.
3. Drills 4. Set of parts and accessories
4.1 Set of parts for wood drills
3 2
1 3
421TI001 KN
The wood drills for the BT 45 are specially
1
developed, milled drills (with relief) and hardened to
increase the tool life and reduce bending. The flat
major cutting edge (1) and the carver (2) permit
accurate positioning and rapid, drilling. The drill tip
(3) simultaneously acts as a “screw“ providing a
421TI002 KN
“self feed“ movement. The drills can be
resharpened.
Wood drill Part No.
Dia. 1/2", 12.5" long 4314 682 5001 Set of parts for wood drill 4314 007 1000
Dia. 3/4", 18" long 4314 682 5002 comprising:
Dia. 7/8", 18" long 4314 682 5003 1 Keyless drill chuck 4314 680 4000
Dia. 1", 18" long 4314 682 5004 2 Handle 4314 790 0300
3 Screw M6x25 LH 9061 373 1350
The drill chuck must be fitted with the aid of a T45
extended length Torx driver (see 5.2).
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4.1.1 Fitting the drill chuck
2
Md = 35 Nm
6 5 3
421TI003 KN
. Screw chuck clockwise onto the thread of the 4
output shaft –
. Tighten chuck down with a torque of 24.5 ft. lbs. 1
421TI005 KN
(35 Nm) with the T45 extended length Torx
driver (see 5.2) –
. Hold the output shaft with a 13 mm wrench at
the same time fo
Set of parts for
planting hole drill 4314 007 1001
comprising:
1 Flange 4314 680 3700
2 Handle 4314 680 3800
Md = 10 Nm 3 Adapter 4314 682 3900
4 Bushing 4314 681 0100
5 Size 19 mm wrench 0812 032 1023
6 Size 13 x 17 mm wrench 0812 012 1119
sio 421TI004 KN
. Turn in locking screw M6x25 LH
– caution: left-hand thread – and tighten it down
to a torque of 7 ft. lbs (10 Nm) –
. Steady the output shaft with a 13 mm wrench at
the same time
4.2 Set of parts for planting hole drill 4.3 Accessories for the user
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Technical Information 13.2002 Page 5
2 421TI007 KN
1 Drill chuck with key 4314 680 4001
2 Carrying strap 4314 710 9000
3 Hook strap 4314 710 6500
5. Service accessories and
special tools
5.1 Service accessories
Part name Part No. Application
Set of gaskets 4314 007 1050 Repairing the engine
Set of carburetor parts 4314 007 1051 Repairing the carburetor
Dirko HT sealant, red 0783 830 2000 Sealing the gearbox
Gear grease (tube, 80 g) 0781 120 1117 Lubricating the gear mechanism
5.2 Special tools
Part name Part No. Application
T45 Torx driver 5910 890 0105 Mounting and removing the keyless drill chuck
Mounting tool 5910 890 2204 Threading in the starter rope (rewind starter)
Other existing special tools are listed in the Repair Manual, STIHL Basic Engine 4140.
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)m~ge 6 Technical Information 13.2002
6. Service note Repair times are in tenths of an hour
(0.1 = 6 minutes)
The specific national safety regulations and the
safety instructions in the User Manual must be Code Type of Repair BT 45
observed when the machine is started.
1 Crankcase, Crankshaft, Crankshaft 0.9
Bearings
6.1 Tightening torques
2
The tightening torques for the BT 45 are listed in the
3 Crankcase, Gasket/Sealing 0.8
Repair Manuals "Basic Engine 4140" and "Machine
Components 4140". 4 Crankshaft Seals (Includes
pressure & vacuum testing) 0.9
6.2 Service note 5 Cylinder and/or Piston 0.9
6 Ignition Module 0.5
The repair manuals "Basic Engine 4140" and
"Machine Components 4140" should be consulted 7 Fuel Hose 0.4
when servicing and repairing the STIHL BT 45 drill. 8 Replace Gear Box Assembly 0.8
Refer also to the STIHL Service Training System 9 Repair/Rebuild Carburetor 0.8
"Diagnosis". 10 Replace Carburetor, Carburetor Jet
(If tried to repair use code 9) 0.4
6.3 Repair times
11 Handle Housing, Throttle Control 0.5
The specified repair times apply for trained 12 Recoil Starter 0.4
personnel and a fully equipped repair shop.
The repair times are specified in tenths of an hour
13
14
Clutch, Clutch Drum
Gear shaft, Drive Gears
0.5
0,9
(0.1 = 6 minutes).
15 Muffler 0.5
The table of repair times for the BT 45 can be 16 Air filter, Filter Cover, Tank Cap,
transferred to the STIHL repair timetable manual. Tank Vent, Fuel Filter, Spark Plug,
Drill Chuck, Attachments
Miscellaneous Minor Repairs 0.4
7. Spare parts 17 Stop Switch 0.6
18 Fuel Tank 0.4
Separate spare parts documentation is available for
19 Replace Gear Box Bearing(s) 1.0
the new machine.
20 All Other Repairs 0.5
50 No Labor 0
© 2002 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-sc 7663
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Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.