16
YEARLY MAINTENANCE
z
Lubricate cable
z
Grease rub blocks and column surface contacting rub blocks
z
Change the hydraulic fluid-
good maintenance procedure makes it mandatory to keep hydraulic fluid clean. No hard fast
rules can be established;-operating temperature, type of service, contamination levels,
filtration, and chemical composition of fluid should be considered. If operating in dusty
environment shorter interval may be required.
The following items should only be performed by a trained maintenance expert.
z
Replace hydraulic hoses
z
Replace cables and rollers.
z
Replace cables and sheaves.
z
Replace or rebuild air and hydraulic cylinders as required.
z
Replace or rebuild pumps / motors as required.
z
Check hydraulic and air cylinder rod and rod end (threads) for deformation or damage.
z
Check cylinder mount for looseness and damage.
Relocating or changing components may cause problems. Each component in the system must be
compatible; an undersized or restricted line will cause a drop in pressure. All valve, pump, and hose
connections should be sealed and/ or capped until just prior to use air hoses can be used to clean
fittings and other components. However, the air supply must be filtered and dry to prevent
contamination. most important- cleanliness- contamination is the most frequent cause of malfunction
or hydraulic equipment.
