PALAZZANI RAGNO XTJ 32 / C, Operation And Maintenance Manual

Page: 134 / 210

Palazzani
Palazzani Industrie spa
OM 601 pag 17 Cap 6
6.12. CHAIN CHECK
The chain for the boom extension are Fleyer type and for safety factor are fitted in
couple with separate link and a device that assure the approximately equal tension on
the chains.
The chains need of periodical maintenance.
Maintenance
For proper operation of the chains and moving parts must always be maintain
appropriate lubrication conditions.
To lubricate chains, develop your arm horizontally, making sure to support end with a
crane with adequate capacity (see Fig. 6.12). In this way the chains Extension are
available for maintenance and inspections.
Fig. 6.12
The lubricant has two main tasks: Action anti-friction, protective action.
The lubricant is usually applied brushstrokes on the surface of the plates, it must
penetrate inside the plates to reach the area of wear between the pin and hole plates.
If on the chain there are abrasive particles (e.g. sand), before oiling must be carefully
cleaned by washing with appropriate solvent. Oiling the chains with dirty indeed push
the abrasive material in the joints, triggering phenomena of abrasive wear.
The type of lubricant to use is a normal mineral oil with viscosity about ISO VG 46 –
460. Keep in mind that more viscous oils are suitable for ambient temperatures lower.
An oil very fluid, penetrates in the joints better, but resists less, compared with more
viscous lubricants. A compound very viscous contrast, has difficulties to penetrate the
joints and thus may not allow the lubricant effect desired.
Perform lubrication every 200 hours or every 12 weeks
Check
For each intervention lubrication must be recorded, if necessary, the chain tensioning
system and check for abnormalities of alignment between the chain and pulley system
attack. The misalignments are very dangerous because they can induce high
Overstressing the chains.