When the WD is supplied with a trolley for handling the load outside the chamber, carry out the following inspections and tests.
a) Stability: fully load the trolley in accordance with the manufacturer's instructions. Apply a force of 250 N horizontally to the highest point of the load or accessory using the balance according to 6.7.2.1. Apply the force successively in at least eight directions at 45° intervals (see 5.28.6).
b) Alignment: visually inspect the trolley for vertical and horizontal alignment with the WD during loading and unloading (see 5.28.2).
c) Collection of liquid residue: by inspection and operation verify that the trolley is provided with means, which are detachable for cleaning, to collect liquid residues from the load and that liquid from the load cannot drip onto the floor (see 5.28.3).
d) Manoeuvrability: check by inspection.
e) Retention of load carriers: fully load the trolley with load carriers each filled to maximum capacity in accordance with the manufacturer’s instructions. By visual inspection determine whether the load carriers were securely retained:
⎯ during loading and unloading;
⎯ while traversing a gradient at a slope of 1 in 20 (see 5.28.5).
f) Parking brake: fully load the trolley in accordance with the manufacturer’s instructions. Position the trolley on a gradient at a slope of 1 in 20 so that it is free to roll down the slope. Apply the parking brake. Observe whether the trolley remains stationary (see 5.28.7).