General Maintenance

COMPANY POLICY: The following are the minimum suggested maintenance practices we recommend based upon normal use. Product application, environment and use may dictate a more stringent inspection and maintenance program than suggested. Also, governmental and/or industry regulations must be viewed and complied with when determining the maintenance program for your specific Miller product. Always remember to contact the factory should you need any assistance in establishing or maintaining your maintenance program.

Should any Miller product become worn or deficient, any attempt at repairs will be taken entirely at the risk and cost of the party making such repairs. We will accept any Miller product at the factory for evaluation, repair and/or replacement after the appropriate arrangements have been made with the factory.


All nuts, set screws, pins, bolts and retainers should be checked for tightness every 14 to 30 days depending on the operating conditions and the product involved. High vibration applications such as pile driving, drilling and/or quarry work, will require more frequent inspections.

All set screws are staked at the factory. Should they attempt to back out, re-tighten as necessary and re-stake thoroughly.

Where furnished, all other pins must remain in place. Replace any missing or damaged pins immediately.


Lubrication Frequency
  Under intermittent operating conditions Under continuous operating conditions Offshore or submerged conditions
Swivels and Swivel Overhaul Balls 14 days 24 hours Click Here
Blocks with Bronze Bushed Sheaves 14 days 8 hours N/A
Blocks with Roller Bearing Sheaves 14 days 24 hours N/A

Lubricant: Either sodium or lithium base greases may be used. Soda soap base greases are more fibrous and cohesive. Lithium soap base greases are particularly applicable where excessive moisture is present.

For swivel applications in offshore or submerged conditions a special high pressure, water-resistant grease with oxidation inhibitors is recommended. Click here for special Miller lubrication recommendations for this application.


When used Hook Latch Missing or off center, bent, broken spring, missing or defective Replace immediately
Daily or when used Hooks, Insulator Links and other fittings Permanent deformation or stretching

Cracks or other defects
A clear indication of overload. Take out of service immediately and replace.

Any suspicion of fractures calls for an immediate investigation and, if necessary, the replacement of the defective part.

ASME B30.10 suggests that hooks may require a nondestructive test as a result of detailed inspection findings.

Insulator links should be returned to the factory yearly for dielectric retesting.
14 days under continuous conditions Swivels Increased or larger than usual gap

Rough turning

Elongated eye holes, bent clevis pins
Possible overload. Remove from service and check for rough turning, elongated holes, bent clevis pins, or other signs of permanent deformation.

Defective bearings. Remove from service immediately.

Indicates overload. Remove for repairs.
30 days under intermittent operating conditions Sheaves Misalignment, as evidenced by wobble or uneven groove flange wear

Striations or corrugations in sheave groove.
Indicates severe bearing wear. Remove from service and forward to factory for repairs estimate.

Check for wear in bronze spacers where used.

Result of rope wear. If serious, have factory replace.

REMEMBER: These are the minimum suggested inspection requirements established based upon the general use of Miller products. Only you can and must establish the inspection and maintenance program consistent with your specific application. Always contact the factory should you have any question regarding a Miller Lifting Product.