Manitowoc Grove GMK 4100L-1, Руководство по обслуживанию

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Maintenance work on the superstructure
8.5 Slewing bearing
2
5
.1
1.
201
6
Maintenance manual 3 302 364 en 8 - 21
GMK 4100L-1
8.5 Slewing bearing
8.5.1 Checking the screws
•
Comply also with the
à
Run-in regulations
, p. 4 - 1.
Tools – Torque wrench.
– Auxiliary tools for the torque wrench;
à
p. 8 - 23.
Prerequisites – The truck crane must be rigged with an outrigger span of at least
8.66 x 5.31 m (28.4 x 17.4 ft) and be level;
à
Operating Instructions
.
– The auxiliary hoist, or alternatively the compensation weight 0.8 t
(1,750 lbs) must be rigged.
– No further counterweight must be been rigged; .
– In addition, the tyres on the 3rd axle line should be removed so that
freedom of movement under the slewing bearing is improved.
– The main boom must be fully retracted and raised to 75°;
à
Operating
Instructions .
– The current load must not exceed 1 t (2,200 lbs) – if necessary unreeve
the hook block.
– The slewing range 360° around the truck crane must be secured.
– The engine must be switched off and secured against unauthorised use;
à
p. 2 - 3.
Safety
instructions
s
M 3
S
Risk of damage to the screws on the slewing bearing.
All screws were tightened at the factory with a certain torque, and this
should be checked during maintenance. Only slight tightening of the
screws is permissible, if required.
You may not slacken the screws and re-tighten them, or completely
unscrew and then reuse them.
If the superstructure has to be removed from the carrier, only a completely
new set of screws may be used to reinstall the superstructure. Only original
screws should be used, which were manufactured according to the factory
specifications.