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COMMISSIONING / OPERATING INSTRUCTION MANUAL
HIGHER CAPACITY CHAIN ELECTRIC HOIST
1. Unpacking for Erection :
Open the packing box from Top’ up to half the box height. For hoist with trolley, check the distance
between wheel flanges. It should be approx. 5 mm more than the width of runway beam flange but
not more than 10 mm. If necessary adjust the trolley, taking care to fit equal number of washers on
both side between trolley side plate and square suspension plate.
In case the trolley can’t be pushed in from one end of the runway beam, it must be opened and
fitted back after the hoist has been fitted under the beam.
For lifting up the hoist, bring the whole box under the beam, hang the hoist on the lifting device
and only now open the box completely and unscrew the hoist from the two angles which are
bolted to the box frame.
2. Power supply :
Connect the hoist to 415V, 3 phase power supply. (DO NOT FORGET TO CONNECT EARTHING) press
a bush button.
All push buttons along with limit switches will now be functioning properly.
3 Limit Switches :
Limit switches are provided for both hoisting and lowering. These trip the supply in event of
accidental Over hoisting OR Over lowering. These are safety devices and hence, it is recommended
to use the hoist in always in its extreme positions.
4. Cautions :
Don’t make any czhange in circuit. And connection must be done as per the circuit diagram only.
5. Maintenance :
The hoist requires hardly any maintenance. Check from time to time the oil levels, indicator on
the gear box. The oil level may be visible, but may be less than the half in height of the sight
glass. Don’t fill up more oil as to 1/2 or 3/4 of the sight glass. It may spoil the oil seals due to high
oil pressure generated by the gears in motion. Drain oil once in a year and replace by new. (We
recommend petrosil (Gulf-oil)) Harmony - 53.
For repair of the gear box, mark the identification lines on gearbox plate to gear box housing,
the hoist should be brought down to rest vertical on the motor cover. After changing the parts,
assembly is to be done in the same sequence as dismantling.
6. Take care for following points :
Each bearing in he inner plate of the gear box must sit on a distance washer and the taper roller
bearings in the outer plate are to be exactly adjusted by sheet metal washers. Measure the depth
frame plate to outer ring of the taper roller bearing with a depth gauge.
This measure gives thickness of the washer to be fitted. Uniform thickness is important
Fit bearing covers with a good sealing compound to gear box plate, allow it to dry for sometime
before putting the parts together,
Load chain should be well lubricated at all times. Lubricate the chain with any medium Viscosity
oil on no load condition. Then run the hoist on load condition only for sometime to ensure that
the oil has penetrated the link chain joints.
Put few drops of oil regularly on all moving parts of limit switch to have them always efficient to
keep away breakdowns.
Guideline for checking chain wear
i) While measuring, there should not be any twist in chain and it shouldbe held loose.
ii) It should be measured -1 mm accuracy and it should be measured at an interval of 2
metres.
Recommended max, “X’ for 17 links in mm-(D-12 mm)-609 mm
At any place if X is more, it is NOT advisable to use.
7. Hoist motor fitting :
If the motor had been emoved, fit the main shaft first and then the motor, to fit the motor, release
the motor and turn the motor shaft on the fan to and from until the coupling parts match.
For fitting the main shaft, slightly hammering may be necessary, but see always, the main shaft
pinion is counter held on the gear box side in its centre and not on the ball bearing. The cap, which
is closing the ball bearing, should be removed at this time.
8. Brake adjustment :
No any adjustment need to be done until the load needs more time to stop after releaing the push
button by lowering. There will be slow increase of stopping time due to linear wear, but never
sudden full slip of load. For adjustment of the brake, remove the motor cover. Open the nut under
the plate on which the magnets are fitted one by one and tighten at the same time the nuts which
are installed on the outside of the plate,
Control the nut opening correctly by moving them a quarter or half turn. So the brake magnets
remains adjusted parallel but the gap gets reduced. It is better to check by a feeler gauge. The gap
should be 0.6 to 0.7 m uniform then, turn all counter nuts, which are fitted on the springs by the
same amount
At least open the lock nuts of two 8 mm brake releasing screws and tighten the screws. Now the
fan must run free and easily when moved by hand without friction otherwise, the gap of the brake
magnets have to be increased slightly. At last bring the brake releasing screws back and lock with
the nut, fit motor cover.
NOTE :- Never run the hoist with power with released brake
Hercules Hoists Limited ©2020
Note :- Due to continuous development and improvement specification listed above may be changed without notice
Indef CHAIN ELECTRIC HOIST
Hercules Hoists Limited ©2020
Note :- Due to continuous development and improvement specification listed above may be changed without notice
Indef CHAIN ELECTRIC HOIST
