Dayton Electric Chain Hoist 3YB78

Inspect hooks for cracking, extreme wear or spreading

Check if throat openings are spread wider than the maximum permissible 15% increase

Check if any hook is bent or twisted more than 10 degrees from the plane of an unbent hook

Inspect the hook latches to ensure that they close the hook throat opening in a secure manner when a load is applied

Inspect the hook shank and nut for any stripping of the threads or other damage

Check if the hook nut is fully restrained by the retaining pin

Inspect load hooks for cracks by the magnetic particle, dye penetrant or other suitable crack testing inspection method

Sign off on the daily hooks inspection

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.;

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

Was the Load Hook Bearing lubricated with SAE 30 gear or motor oil?

Upload a photo of the lubricated Load Hook Bearing

Sign off on the Load Hook Bearing lubrication

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: Only trained personnel should perform this procedure

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

General purpose spray available?

Sign off on the lubrication process