Snorkel MB20N-sn0001-0131 - Manual (Page 5)

Transportation
MB20N/MB26
2.6
3 Transport By Truck
The MB20/26 can be carried on a suitably rated
transportation vehicle or trailer. Because of its high
gradeability, the machine can be driven under its own
power on to a standard loading ramp (Up to 14
degrees). It is recommended to reverse the machine
up on to the truck thus forward travelling down the
ramp at the delivery point. Winch-assisted loading is
allowable for larger slopes, however, operate the
trucks assist winch at minimum speed to avoid over-
pressurising the hydraulic system in the machine.
When the MB20/26 is on the truck or trailer it should
then be made secure by:-
1. Chocking the wheels.
2. Securing with adequate chains or straps
to the lifting lugs on the chassis.
To tow the vehicle or to winch it on to a truck it is
necessary to hydraulically bypass the control valves
and release these brakes.
Proceed as follows:-
Refer to the valve block drawing below.
1. Fully lower the jib boom and the mast sections.
Rotate the mast into the stowed position.
2. Turn the Upper Control Box to the OFF position
and remove the key.
3. Remove the rear GRP cover from the
chassis and locate the hydraulic control valve
block.
4. The hand valve marked ‘A’ should be turned fully
clockwise to close. The hand valve marked ‘B’
should be turned fully anti-clockwise to open.
5. Operate the red handpump a number of times to
develop sufficient pressure to ‘separate’ the
internal brake disks. These brakes are integral
with the hydraulic drive motors.
The machine can now be safely towed or winched.
Towing/Winching Valves
The failsafe brakes are automatically applied when
the machine comes to a stop or in the event of total
power loss due to low battery or malfunction of the
hydraulic drive system.
HANDPUMP
Valve Block Towing Valves
A
B
CAUTION
DO NOT loop straps through the cage, ladder or jib
as this could cause permanent structural damage
during transportation.
WARNING
RISK OF SERIOUS INJURY. Releasing the brakes will
cause the machine to move uncontrollably on a
slope. Damaging momentum can be developed due
to the large mass of a slow moving machine.
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