Harrington Hoists and Cranes ED-DA Hoist - (ED3) - Manual (Page 32)

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6.0 Maintenance and Handling
6.1 Lubrication
6.1.1 Load Chain
 For longer life, lightly coat the Load Chain with machine or gear oil. Ensure that the oil is applied to
the bearing surfaces of the Load Chain links.
 The chain should be lubricated every 3 months (more frequently for heavier usage or severe
conditions).
 Lubricate Load Chain with grade ISO VG 46 or 48 oil or equivalent machine/gear oil. For dusty
environments, it is acceptable to substitute a dry lubricant.
 The Load Chain lubrication should be accomplished after cleaning the Load Chain with acid free
cleaning solution.
6.1.2 Hooks and Suspension Components:
 Hooks - Bearings should be cleaned and lubricated at least once per year for normal usage. Clean
and lubricate more frequently for heavier usage or severe conditions.
 Suspension Pins - Lubricate at least twice per year for normal usage; more frequently for heavier
usage or severe conditions.
6.1.3 Gear Box:


Not using Harrington ED oil or the wrong quantity of oil may prevent the friction
clutch from working properly and may affect the ability of the hoist to hold the load. Refer to
Section 3.1 for the correct quantity.
 Change gear oil at least once every 5 years. The oil should be changed more frequently
depending on the hoist's usage and operating environment.
 To change the gear oil, remove both fill and drain plugs and allow the old oil drain completely.
Replace the drain plug and refill the gear case with the correct quantity of new oil or until the oil
level is even with the bottom of the oil check hole. Refer to Figure 3-1.


Dispose of the used oil in accordance with local regulations.
6.2 Load Chain
6.2.1 Lubrication and Cleaning – refer to Section 6.1.
6.2.2 Load Chain Replacement:
1)

The hoist must be properly powered and operational in order to perform the
following procedures.
2)

Be certain that the replacement Load Chain is obtained from Harrington and is the
exact size, grade and construction as the original chain. The new Load Chain must have an odd
number of links so that both its end links have the same orientation. If the Load Chain is being
replaced due to damage or wear out, destroy the old chain to prevent its reuse.
3)

When replacing load chain, check for wear on mating parts, i.e. Load Sheave,
Chain Guides and Idle Sheaves, and replace parts if necessary.