Dynapac Hatz F80W, Workshop Manual

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14 F80W
2 Safety measures and instructions
Safety measures for work on the electrical system
• Disconnect the battery when repairing the charging circuit to prevent accidental short circuits.
• Before removal, disconnect the cable from the negative terminal (-) and then from the positive terminal (+).
• Do not disconnect the batteries when the engine is running.
• Connect the negative battery terminal to the ground and the positive terminal to the “B+” alternator output. The opposite connec-
tion would destroy the whole semiconductor equipment.
• When starting using an auxiliary external power supply, do not disconnect this power supply until the machine battery is con-
nected. Pay attention to the starting voltage of the auxiliary external power supply (for 24 V).
• Do not put the alternator into idle operation, i.e. with a disconnected wire from the “B+” terminal and connected “D+” terminal.
• Do not check the presence of voltage in the wire by sparking against the machine frame.
• Do not perform any activities generating sparks.
• Use protective rubber gloves and eye protection when handling batteries.
• Protect your skin and clothes against being splashed by the electrolyte or lead particles.
• In case of eye contact with the electrolyte, immediately flush the affected eye thoroughly with running water for several minutes.
Then, seek medical treatment as soon as possible.
• If the electrolyte comes in contact with skin or clothing, remove the clothes, immediately wash the affected areas with soapy water
or a solution of baking soda and water and seek medical treatment.
• In case of ingestion of electrolyte, drink the maximum possible amount of milk, magnesium oxide dissolved in water or at least
water and immediately seek medical treatment.
• Never fill the cells with distilled water, unless it is followed by work with the machine or recharging outside the machine. It would
otherwise cause excessive battery self-discharge.
• Never fill up the acid (H
2
SO
4
)!
• Do not turn over the batteries to avoid electrolyte flowing out of the degassing vents.
• In case of acid (electrolyte) spillage, wash the affected area with water and neutralize with lime.
• The charging process releases hydrogen, which forms an explosive, easily combustible mixture with air. Do not smoke or use open
flame or lights in the vicinity.
Welding work on the machine
• Before performing welding work on the machine using an electric arc, disconnect all elements containing semiconductors from
the electrical system, including the machine electronics:
- ground the power supply as well as the repaired machine,
- protect the power supply against moisture,
- place the ground terminal in close proximity to the weld joint,
- When performing welding work on suspended parts or machine, it is necessary to prevent current from reaching the lifting
equipment by insulating the point of current transition or using non-conductive slings (hemp rope).
Sealing
• Use new seals for all installation.
• Seal kits are obtained as spare parts.
Tightening torques
• In order to apply the correct tightening torque, use a torque spanner.
• Fastening screws and nuts of used quality shall be tightened according to the respective tables.
• The screw quality is indicated on the screw head.
• Different tightening torques are specified in the respective chapters.
• Threaded joints of hydraulic circuits shall be tightened according to the tables.
• The presented tightening torques apply to non-lubricated threads.
• Only use new self-locking nuts.