page 33
V100-VL400 User Manual – Maintenance
Item Action
Every 7,500 hours (Service C)
*Compressor cylinders Remove cylinder heads and cylinders.
*Pistons Check piston ring gaps. Renew rings if necessary.
Inspect small end bushes /gudgeon pins. Renew if
necessary.
Check guide ring 'stand out'. §
*Connecting rods Inspect big end bearings. Renew if necessary.
Note: if new big end bearing shells are fitted, the big
end bolts must also be renewed.
Check gland packings. Renew if excessive oil is being
passed. §
Electrical components Inspect starter contacts.
Inspect motor for cleanliness.
Check condition of cables and wiring.
Every 15,000 hours (Service D)
*Compressor Dismantle completely.
Inspect crankshaft journal bearings.
Check security of balance weights.
Renew main bearing shells.
Renew oil seals.
Renew big end bearing shells.
Renew big end bolts.
Inspect crossheads and guides. §
Renew small end bushes.
Inspect piston rods.
Renew piston rod gland packings. §
Inspect cylinder bores.
Renew piston rings.
Strip and inspect oil pump. Renew worn parts. Renew
drive belt.
Inspect relief valves and check operation.
Inspect all protection devices and check operation.
Remove motor. Check coupling bolts for security.
Inspect main starter contacts.
Items marked § refer to oil-free compressors only.
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