. MAINTENANCE GUIDES TO MAINTENANCE 4 - 9 JACKING UP MACHI Stop the machi ne on flat ground , set the parking brake switch to the PARKING position, then put blocks under the t ires. Stop the engine With the machi ne unloaded, jac k the machine up. Use a 50-ton hy Front (The di agram sho ws the situation when the left side is jacked up.) Whe n jacking u p the front axle, s uch as when repla cing the f ront tire, put steel pl ate (3) between j ack (2) an d holder (1) under the kingpin, then pu t the jack in con tact. Whe n doing thi s, be careful not t o let bolt (4) cont act steel p late (3).
Whe n jacking u p the tires on one side only , put sup port stan d (5) in co ntact with t he bottom of the frame in order to maintain the machine stabilit y. pushes up A-frame (6), there is danger that the Whe n the jack nger that the A-frame may be deformed or da maged by the loa d on the j ack. For t his reason , do not put the j ack in contact wit h the A-frame whe n jacking u p the machine. Rear (The di agram sho ws the situation when the left side is jacked up.) Whe n jacking u p the rear axle, s uch as when repl acing the rear tire, put a steel plate (3) between jack (2) a nd the bottom of rear axle (7), then p ut the jack in con tact.
Whe n jacking u p the tires on one side only , put sup port stan d (5) in co ntact with t he bottom of the frame in order to maintain the machine stabilit y.