Hammer unit
Hammer frequency 24 Hz (Cobra mk1)
27 Hz (Cobra TT)
Impacts/min 1440 (Cobra mk1)
1620 (Cobra TT)
Impact energy 60 J at 24 Hz (Cobra mk1)
40 J at 27 Hz (Cobra TT)
Lubrication Hammer mechanism lubricated in its own oil bath
Hammer mechanism oil Diesel engine oil
SAE 15W/40 API:CD
Oil capacity 0.1 litre
Oil consumption 0.015 l/h
Tightening torque loads
Note: The indicated tightening torque loads are for oiled threads.
Flywheel 35 Nm
Fan (A) 25 Nm
Fan (B) (plastic) 8 Nm
Nuts and screws for covers 10 Nm
M8 Engine / Hammer cylinder 23 Nm
M8 Tool holder 20 Nm
M5 Engine cylinder screws 10 Nm
M5 Diaphragm valve screws 8 Nm
M6 Studs on crankcase halves 4–5 Nm
Decompression valve 20 Nm
Spark plug 20Nm
Special assembly instructions
Reassembly of KM nut and gear wheel, see fig. 47.
Degrease the transmission shaft and gear wheel taper with denatured alcohol or pure petrol.
Locate the gear wheel on the transmission shaft taper. Screw the KM nut by hand until it makes contact with
the gear wheel. Then tighten the nut by half a turn (180°) using service tool S18.
Reassembly or dismantling of starter device spring.
Always wear safety gloves and safety glasses when reassembling or dismantling the starter spring.
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Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com