Harrington Hoists and Cranes CB Hand Chain Hoist - Manual (Page 26)

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.
 Hook Yokes and Latches – Lubricate the hook yokes and hook latches at least twice per year for
normal usage; more frequently for heavier usage or severe conditions.
 Suspension Pins - Lubricate the chain pin and the top pin at least twice per year for normal usage;
more frequently for heavier usage or severe conditions.
6.1.3 Applying Grease to Gears:
 Remove gear case as instructed in Section 6.3.
 Remove old grease and replace the new grease (NLGI No. 3), at annual inspection.
 Temperature range of standard grease is -20 ˚C (-4˚F) to + 60˚C (140˚F). If the hoist is used at
temperatures below - 20˚C (-4˚F) or above 60˚C (140˚F), consult the manufacturer or dealer since
some parts should be changed.
Table 6-1 General Lubrication
Parts to be Lubricated Name of Oil
Amount of Lubrication
and Lubricating Method
Frequency of
Lubrication
Mechanical Brake Parts:
Ratchet Disc, Pawl Pin,
Screw parts of Pinion
Machine or
Gear Oil
Wipe off oil with waste
cloth after applying
proper amount of oil. When the hand pull
becomes extremely heavy
in lowering operations.