Dieci Pegasus - External Boom Chains

Mod. E.T. PEGASUS
D/40
Maintenance and adjustment
- CAUTION: - Read the SAFETY REGULATIONS (in this manual) carefully for the safety of all personnel and the machine.
(g.81/D)
EXTERNAL BOOM CHAINS
(g.81/D)
Lubrication
Lubrication means:
- Introducing a liquid between contact surfaces to decrea-
se wear and avoid seizure.
- Protecting the chains against corrosion.
- Reducing the noise produced by contact surfaces.
Lubrication must be carried out:
- Lengthways in an area where the joints are not subjected
to very much stress to ease the penetration of lubricant.
- Transversally between the plates to ease penetration of
the lubricant in the joint.
The viscosity of the lubricant must suit the ambient tempera-
ture. Insufcient viscosity increases lubricant loss, too much
viscosity prevents the lubricant from penetrating the joints.
Consult the table on the right for the correct viscosity (g.82/D).
- CAUTION:
In the case of special applications or use in adverse condi-
tions, consult a DIECI service centre.
- PROHIBITION -
IT IS STRICTLY FORBIDDEN to lubricate
the chains with grease.
Wear inspection
At the prescribed times it is necessary to inspect:
- The installation geometry.
- The condition of the chain, to analyse any traces of fric-
tion that may indicate an incorrect installation geometry.
Wear on the prole of the external plates due to contact
with the pulleys and the drive systems. Wear on the sides
of the external plates and on the heads of the pins due
to contact with the pulley anges or any drive devices.
- Wear on the chain joints either by directly measuring
their length using a measuring tool or control ruler, or by
carrying out a visual inspection.
- Wear of the Flyer hoisting chain plates.
- CAUTION -
The chains must be replaced when wear
due to elongation exceeds 2%.
When chains are replaced, the respective
rollers MUST also be replaced.
Recommended viscosity
ISO VG (Cst)
Temperature (C°)
- 15 < T< 0
0 < T< 50
50 < T< 80
Between 15 and 32
Between 46 and 150
Between 220 and 320
Internal
width
Roller
diameter
External link
Bushing
Roller
Internal plate
Connecting link
External plate
Pin
Pitch
Internal link
(Fig. 82/D) - Chain oil viscosity table
(Fig. 83/D) - Standard chain components