. MAINTENANCE GUIDES TO MAINTENANCE PRECAUTION WHEN REMOVING HYDRAULIC PIPING: WARNING etc. have been 4 - 7 The hydraulic circuit is always under in ternal pressure. When inspecting or replacing the hoses or pip ing, c heck that th e pressure in the circuit has been released. Failur e to do this may cause serious personal injury. A lways do as follows. Never carry out inspection or replac If there is any leakage of oil from the hoses or piping, or the hoses or piping or the sur rounding ar ea are wet, check the piping for cracks and the hoses for cracks and swelling. ves, or other protective equipment when carrying out inspection.
Always wear protective glasses, glo ves, or other protective equipment when carrying If high-pressure oil leaks from a sma skin or cause you to lose your eyes wash the oil off with clean water, th ll hole and hits your skin or and eyes directly, there is danger th at it m ay make ho les in your ight. If you are hit on the skin or in the eyes by hig h-pressure oil an d suffer seri ous injury, en get immediate medical attention. The hydraulic circuit is always und er pressure. Always release the pressure in th e circuit b efore removing t he hoses or piping.
With the brake circuit, d epress the brake pedal at least 20 times bef ore startin g the operation t o reduce the pressure in the accumulator to 0. BLEEDING AIR FROM HYDRAULIC CIR CUIT: been repaired or replaced and if the hydraulic hoses, pipes If the hydraulic components have disconnected, it is necessary to bl eed air in the circuit. See "WHEN REQUIRE D (PAGE 4-24) ". PRECAUTIONS WHEN INSTALLING HY DRAULIC HOSES: ns where there are O-rings or gasket seals, clean the mounting surface, and to forget to install the O-rings and gaskets. When removing parts at locatio replace with new parts. When doing this, be careful not When installing the hoses, do n ot twist them or bend them sharply.
If they a re installe d so, their servic e life will be shortened extremely and the y may be damaged. CHECKS AFTER INSPECTION AND MA INTENANCE: If you forget to perform the checks after inspection and maintenance, unexpecte d problem s may occur, and this may lead to serious injury or death. Alw ays observe the following: gine stopped) intenance points been forgotten? tenance items been performed correctly? Checks after operation (with en Have any inspection and ma Have all inspection and main Have any tools or parts bee inside the machine and get c Are there any leakage of coo n dropped inside the machine?
It is particul arly dangerous if parts are dropped aught in the lever linkage mechanism. lant or oil? Have all nuts and bolts been tightened? ng lant or oil? Have all nuts and bolts been tigh Check when the engine is runni See "TWO WORKERS FOR safety for checking when the Check if the inspected and s Increase the engine speed t MAINTENANCE WHEN ENGINE IS RUNN ING (PAG E 2-31)" in the s ection on engine is running. Pay enough attention for