Dayton Electric Chain Hoist 3YB99

Proper lubrication is necessary for a long and relatively trouble-tree hoist operation.; Refer to the following and the RECOMMENDED LUBRICATION SCHEDULE for lubrication points, type of lubricant, and frequency of lubrication.

LOAD CHAIN.; Clean the load chain with acid-free solvent and coat with SAE 90 gear oil. Wipe excess oil to prevent dripping. Never apply grease to the chain.

GEARING.; The gear case of this hoist is filled at assembly with approximately 1½ pints of SAE 90 EP gear oil.; Check oil level by removing the oil level check plug from the side of the hoist. With the hoist hanging level, gear oil should be even with the hole.

BEARINGS. All bearings except hook and idler sheave bearings are lubricated at the factory and should not require additional lubrication. Noisy or worn bearings should be replaced.

LIMIT SWITCH SHAFT.; Remove any dirt accumulation and spray with a general purpose lubricant.

HOOK BEARING.; Apply a few drops of SAE 30 gear or motor oil around the edge of the bearing.

IDLER SHEAVE BEARING (BUSHING).; Disassemble load block and apply a light coat of NLGI #2 grease, or equivalent, inside of bearing.;

Warning: Ensure the machine is turned off before starting the lubrication process

Was the load chain lubricated with SAE 90 gear oil?

Sign off on the load chain lubrication

Chain is to be kept clean and lubricated.

Visually check chain every time hoist is used.

Hoist must not be operated when chain is twisted or kinked. An important phase of hoist maintenance is chain inspection. Check individual links and check for chain elongation.

1. Check the chain for overall wear or stretch by selecting an unworn, unstretched length of chain (at the slack end for example).; Let the chain hang vertically with a light load (about 20 pounds) on the chain to pull it taut.; Use a large caliper to measure the outside length of a convenient number of links about 12 inches).; Measure the same number of links in a used section of chain and calculate the percentage increase in length of the worn chain.

2. If the length of the worn chain is more than 1½% longer than the unused chain (0.015" per inch of chain measured), then the chain should be replaced.; If the chain is worn less than 1½%, check it at several more places along its length.

If any section is worn more than 1½%, the chain should be replaced.

The chain used on this hoist has very carefully controlled dimensions and has been heat treated. Do not attempt to substitute other manufacturer's chain.;

Periodic — Indicates items requiring inspection monthly to yearly. Inspections to be performed by or under the direction of a properly designated period.; The exact period of inspection will depend on frequency and type of usage. Determination of this period will be based on the user’s experience.; It is recommended that the user begin with a monthly inspection and extend the periods to quarterly, semi-annually or annually based on user’s monthly experience.

1. Inspect Hook and Suspension

Possible Deficiencies:; - Cracks, bending, stripped threads Lug Connections

2. Inspect Pins, Bearings, Bushings; Possible Deficiencies:; - Excessive wear, corrosion, cracks, distortion Shafts, Couplings

3. Inspect Nuts, Bolts, Rivets

Possible Deficiencies:; - Looseness, stripped and damaged threads, corrosion

Possible Deficiencies:; - Distortion, cracks, and excessive wear.

- Build-up of foreign substances

Warning: Ensure the machine is turned off before starting the lubrication process

Dayton Dem-Kote No. 5X628 multi-purpose oil available?

General purpose spray available?

Lubrication process completed successfully

Sign off on the lubrication process