MAINTENANCE 4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH
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4.12.1 HIGH STRENGTH BOLT CONNECTIONS - CHECK TORQUE LOAD
Check high-strength bolt connections and securing elements for
damage and looseness. If any damages, failures or wrong condi-
tion are found, corrective action must be taken.
OTICE
● If the torque load is not stated otherwise refer to standard
torque chart for torque data.
● Bolts inserted with Multi-Purpose Grease MPG, KP2K on
thread and head.
EMARK
When selecting the tightening torque observe quality grade
and bolt size
Hydraulic Access Ladder, illust. Z 21136
Check condition and fastening of hinged ladder (01), bearing
assembly (17) and hydraulic cylinder (03).
Make sure the self locking nuts (06) are correctly tightened and
have not lost their clamping torque.
Tightening Torque of Self Locking Nuts (06):
● New nut: 1000 Nm
● Used nut: 800 Nm
Clamping Torque of Self Locking Nuts (06):
● New nut: 200 Nm
● Used nut: 20 Nm minimum
If the clamping torque is less than 20 Nm, use a new self
locking nut.
Lubricate both eyes of hydraulic cylinder (03). Make sure both
pivot pins (12 and 13) are properly secured with cotter pins (15).
Check hydraulic lines (23 and 24) for leakage and damage.
Replace as necessary.
(01) Hinged ladder
(03) Ladder lifting cylinder
(06) Self locking nut
(17) Ladder bearing assembly
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