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December 2019W11/W12/W13 | Operation manual
12.3 Welding
• Welding work may only be carried out by trained personnel
• Welding work may only be carried out on vessels that contain, or have contained, substances that are
flammable, capable of promoting fires, are explosive or which develop harmful vapors, gases, mists or dusts
during welding operations by persons assigned to this work under the supervision of a qualified expert! If there
are problems or questions, ask!
Before welding on the wheel loader
• Disconnect the battery as described in these operating instructions.
• Disconnect the positive terminal (clamp B+) on the generator!
• Switch the battery isolator switch (if fitted) to OFF!
• Protect disconnected terminals and connections against short-circuits!
• Attach the welding current clamp in the immediate vicinity of the welding point! The welding current may not
flow through gears, bolts, joints or hydraulic rams!
After welding
• Reconnect all electrical connections and check their function!
• Reconnect the battery as described in the operating instructions!
12.4 Hydraulic system
• Prior to carrying out repair work on the hydraulic system, depressurize the system as described in section 6.
"DISCHARGING RESIDUAL PRESSURE IN HYDRAULIC SYSTEM".
• Replace damaged and leaking hydraulic lines and hoses with new ones! Do not use used hoses!
• Hydraulic hoses must be renewed after a service life of six years!
• Dispose of spilled oil and oily waste in an environmentally compatible manner!
• Observe the general safety instructions for servicing and inspection
12.5 Brakes
• Repair work on brakes may only be carried out by personnel trained to work on brake systems!
• The use of brake fluid other than that specified by the manufacturer is prohibited!
• Observe the notes on health hazards and environmental protection when working with brake fluids!
• Only carry out repair work on brakes if the wheel loader is secured as described in section 12. "SAFETY
INSTRUCTIONS FOR REPAIRS"!
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