Abacus Lighting, Sutton-in-Ashfield, Nottinghamshire, NG17 5FT, England. Tel: (+44) 01623 511111, www.abacuslighting.com
8
RLH11 counterbalance (for HL330 masts)
3.2.
Moving the Counterbalance (RLH5 only)
The upper ram anchor pin is lengthened to serve as a handle. To move the unit, pull the ram
backwards so that the weight bears on the axle of the chassis and, with the weight being balanced
by the pump unit, wheel the unit in the normal manner. The unit must never be moved with the
ram in the extended position.
3.3.
Checks Before Use
1. Examine the trolley framework for damage. Check that the wheels are operating and retained in
position.
2. Examine the ram in particular the area around the seals for signs of damage and leakage of oil.
3. Check the oil level is to the centre of the level gauge with the tank top horizontal and the ram
closed.
4. Check the hydraulic hoses for damage and loose connections.
5. Check the electrical flex for damage or loose connections. Connect to a 240v supply and switch
on.
6. Check the function of the pump and control valve by extending the ram for a short distance i.e.
100mm. Retract the ram at the same time observe the pressure gauge. During extension it should
be 0 to 300psi and 1000psi minimum during retraction. As the ram reaches fully closed the
reading should build up to the relief valve pressure of 2500psi.
7. Check that the upper and lower ram anchor pins are the correct diameter and colour code.
IF ANY OF THESE CHECKS ARE FAILED THE COUNTERBALANCE MUST NOT BE USED.
