Hitachi ZW 310-6 Operator's Manual page 200

Towing Pin
d
WARNING: Since towing is a potentially dangerous
operation, perform only when there is an
emergency or crisis situation.
IMPORTANT: To prevent excessive wear of tires and
for safety, avoid towing requiring more than the
available towing force, and keep the specified
speed during towing.
Available towing force (Power Mode ON):
190 kN (19400 kgf)(43000 lbf)
Towing speed: 10 km/h (6.2 mph) or less
Towing pin (2) is located on the back end of the machine.
It is used for towing another machine, being towed from
the rear side, or fastening the machine on a trailer deck for
transportation.
Pull up the left end, or push down the right end, of stopper
(1) to pull out towing pin (2).
Tie or loop the towing rope, strap, or cable and let it pass
through the hole.
IMPORTANT: DO NOT use eye plate (3) on the rear
chassis when pull out or rescue this machine from
the rear side.
Use eye plates (3) on the front chassis when pull the
machine from the front side. Contact your nearest
authorized dealer for the necessary information or
assistance.
OPERATOR'S STATION
Front chassis
1-138
1
2
3
ZW310-1-135-1
Rear chassis
90Z7B-1-135-2