Heavy Duty Assisted Lift Trunnion Operation and Maintenance Manual
Form Reference
C64.65546
Issue
5.00
15 of 39
Issue Date
May 2021
Pre Installation Checks
Prior to mounting the HD ALT a check shall be made with a spirit level to ensure that the
foundation and therefore the top of all four mounting studs are level and at least 200mm of
threaded stud is available above the foundation top. The mounting studs should be clean, free
of damage and lubricated.
Ensure that the Cup and Cone Washer Pack and the 8 x M24 Bolts with their flat and spring
washers are inside the electrical connection box. If the HD ALT is not to be installed
immediately it is recommended the connection box is re-secured with a cable tie or padlock.
Mounting nuts and the cup and cone washers shall then be fitted strictly in the sequence shown
below other spring and flat washers are fitted in accordance with the civils design or good
engineering practice. The distance from the bottom of the HD ALT base to the foundation top
surface shall be at least 80mm.
(The nut shown at the bottom of the ‘stack’ above is a representation to illustrate the method
of securing the studs in grillage etc. and does not form part of the mounting arrangement).
The only mounting hardware supplied with the HD ALT is the ‘cup and cone’ washer set (items
1&2 on the illustration above). All other hardware is to be provided by the customer.
Spare washer sets are available using the order detail below.
