Harrington Hoists and Cranes TNER Theater Hoist - Manual (Page 26)

6.0 Maintenance and Handling
6.1 Lubrication
6.1.1 Load Chain
 For longer life, the load chain should be lubricated.
 The load chain lubrication should be accomplished after cleaning the load chain with an acid free
cleaning solution.
 Apply Harrington lubricating grease (Part No. ER1BS1951) or an equivalent to industrial general lithium
grease, NLGI No. 0, to the bearing surfaces of the load chain links as indicated by the shaded areas in
Figure 6-1. Also apply the grease to the areas of the load chain (shaded areas in Figure 6-1) that
contact the load sheave. Insure that the grease is applied to the contact areas in the load sheave
pockets.
 Machine or gear oil (grade ISO VG 46 or 68 oil or equivalent) may be used as an alternative lubricant
but must be applied more frequently.
Figure 6-1 Chain Grease Application
 The chain should be lubricated every 3 months (more frequently for heavier usage or severe
conditions).
 For dusty environments, it is acceptable to substitute a dry lubricant.
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.
 Idle Sheave Bearing - Bearings should be cleaned and lubricated at least twice per year for normal
usage. Clean and lubricate more frequently for heavier usage or severe conditions.
26