Check Tire For Damage; Check Wheel Bolt Torque; Replace Tire - Hitachi ZW 550-6 Operator's Manual

Check Tire for Damage

--- every 10 hours (daily)
d
CAUTION: If tire has external damaged such as
deep cuts, an accident due to puncture or burst of
the tire may occur, possibly resulting in injury or
death.
Check the external appearance of tires for damage.

Check Wheel Bolt Torque

--- every 500 hours
(50 hours at fist time only)
Be sure to check the wheel bolt torque by turning the
bolt clockwise.
Tightening Torque: 892 N·m (91 kgf·m, 658 lbf·ft)

Replace Tire

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CAUTION: Secure the front and rear chassis with
the articulation stopper (lock bar and pins).
IMPORTANT: Height of the machine may change
according to the types of tires to be installed. Do
not change the specifications of the machine by
using unauthorized tire sizes.
1. Park the machine following the same procedures as
described on page 7-6 for preparation of inspection/
maintenance work.
2. Install the articulation stopper to the front and rear of
the chassis by following the procedures described on
page 7-8.
3. Loosen all wheel bolts one turn. Note which way the
tread pattern is facing.
4. After jacking up the machine, securely support the
machine with blocks.
5. Remove the wheel bolts. Replace the tire.
6. With the tire raised off the ground, lightly tighten the
wheel bolts in order as illustrated to the right.
7. Lower the machine. Retighten the wheel bolts to
the above torque specification and in the order as
illustrated to the right.
MAINTENANCE
f
NOTE: This illustrates that a bolt at diagonal position,
not the next one, should be tighten as shown.
The number of wheel bolts may differ.
7-95
(Right) (Wrong)
Front
M4GB-07-104
M4GB-07-102