3
Heavy Duty Springs
The products covered by this handbook include one or more heavy duty springs which from
time to time during the operation of the lift store considerable levels of energy.
Such springs include:
• Torsion bars
• Torsion springs
• Helical springs
• Gas springs
Heavy duty springs are typically used in counter-balanced platforms and platform
extensions, and in conjunction with single-acting hydraulic cylinders.
Special care must be taken when:
• Fitting
• Servicing
• Repairing
• Dismantling
Lifts incorporating these springs or the springs themselves.
Before carrying out work on the lift, precautions should be taken to:
1. Read the Fitting and Service manuals as appropriate.
2. Ensure that the work is supervised by a competent engineer.
3. Ensure bystanders are not exposed to risk.
4. Use adequate protective clothing.
5. Secure movable parts, e.g. platform and runners.
6. Carefully relax spring elements before attempting their removal or adjustment.
7. Use special tools if necessary - for example, to pre-compress gas springs before
installation.
If any doubt exists regarding the safe working practices involved with heavy duty springs,
consult the Customer Service Department of Plafinger Tail Lifts Ltd before proceeding with
the work.
Warning: Spring elements store energy and are potentially dangerous. Incorrect
installation, use, adjustment or removal may result in serious injury.
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