Heavy Duty Assisted Lift Trunnion Operation and Maintenance Manual
Form Reference
C64.65546
Issue
5.00
7 of 39
Issue Date
May 2021
To enable simple transport and installation the HD ALT is delivered from the factory locked in the
horizontal position using the lockdown safety pin secured with a standard RBK-221 Padlock.
DO NOT ATTEMPT TO REMOVE THE PADLOCK AND SAFETY PIN UNLESS A
SUITABLE HEAD/POST IS FITTED CORRECTLY INTO THE HD ALT
REMOVING THESE HOLD DOWN DEVICES WITHOUT THIS LOAD MAY CAUSE SERIOUS
INJURY AND ENDANGER LIFE DUE TO THE STORED ENERGY IN THE SPRING SYSTEM
BEING RAPIDLY RELEASED
The HD ALT shall not be used for any purpose other than that described in the introduction above.
If it is used for any other purpose, Unipart Dorman will not accept any responsibility for damage,
injury or death caused by the activity.
THERE ARE NO USER SERVICEABLE PARTS IN THE HD ALT AND ANY ATTEMPT
TO DISASSEMBLE THE SPRING UNITS MAY ENDANGER LIFE AND WILL VOID ANY
WARRANTY
All activity on the HD ALT and any associated head/post, both mechanical and electrical, must
only be carried out by staff deemed competent in these fields by their employer. It is the user’s
sole responsibility to ensure that the apparatus is installed and/or maintained by competent staff
in accordance with the latest policies published by Network Rail such as Noticeboards etc. Where
a specific competency is subject to periodic retest and certification, it should be valid throughout
the time of the works.
A copy of these instructions shall be readily available. Anyone required to operate the HD ALT is
to be fully conversant with them and deemed sufficiently competent (and where necessary,
properly certified) to undertake the task by their supervisory chain.
The latest version of this document is available from Unipart Dorman using the contact details
on the back page or by visiting the Unipart Dorman website.
Operating Safely
IF ANY DOUBT EXISTS ON THE SERVICEABILITY OF THE HD ALT, YOU ARE NOT SURE
ABOUT ANY OF THE INSTRUCTIONS IN THIS DOCUMENT OR YOU ARE UNSURE OF
THE CORRECT WAY TO USE THE HD ALT, YOU SHOULD STOP WORK AND CONTACT
YOUR SUPERVISOR IMMEDIATELY AND IF NECESSARY, UNIPART DORMAN FOR
SPECIALIST ADVICE USING THE DETAILS ON THE BACK PAGE
