Manitowoc GROVE GMK7450 - Main Boom Maintenance

Maintenance work on the superstructure
8.11 Main boom
16.08.2018
Maintenance manual 3 302 577 en 8 - 85
GMK7450
8.11 Main boom
8.11.1 Grease the piston rod of the derricking cylinder
Grease, spare
parts and tools
–Brush.
• Clean the uncovered end (1) of the piston
rod by removing old grease, dirt particles
and rust.
• Grease the uncovered end, making sure the
grease coating is evenly distributed.
• Repeat this procedure on the second der-
ricking cylinder.
After every high-pressure cleaning operation
on the truck crane
• Grease the piston rod.
H
You can hinder the formation of rust if you turn the main boom to the side
between maintenance intervals and completely lower it.
M 1
Designation GROVE part no.
Lubricant RHUS 2 AF; 1 kg
(Apply the grease with a brush)
03325215
or
Spray on Berulub; 0.5 litres
(spray-on spray)
01929824
S
Risk of damage to the derricking cylinder's gasket due to rust!
Ensure that the uncovered end of the piston rod is always kept covered with
a laye
r of grease. In this way you can avoid rust which damages the gasket
in the derricking cylinder head when fully lowered.