MLS MMLS3, Руководство оператора

Страница: 38 / 48

MLS Test Systems Pty Ltd
Revised: April 2013
36
able to lift the wheels 40 to 50mm off the rails. If necessary, adjust one
or both of the two adjustable links between the bogies and link sections.
If the chain of bogies is too short, it pulls the drum towards the centre of
the machine, against the drum tension springs so that the drum may slip
because the guide wheels are not properly gripped between the drum and
the outer guide rails.
Maintenance checks:
1. Before commencing with a test, or every 400 000 axles or
once a week:
1.1 Check the tire pressure.
Compensate for temperature difference, if necessary. E.g. to
inflate a tire at 20ºC to obtain 700 kPa at 50ºC, the inflation
pressure, P, should be:
P = 700 x (273 ºC + 20 ºC) / (273 ºC + 50 ºC) = 635 kPa
Because the tires are small, losing only a small amount of air
can cause a significant drop in pressure. When using a hand
gauge to check the pressure, first slightly over inflate. Then let
small amounts of air escape between the valve and the gauge
until the correct pressure is reached. Then quickly remove the
gauge. Otherwise use a compressor with an inline gauge,
inflate slowly to the correct pressure and remove the connection
to the valve as fast as you can.
1.2 Inspect the rubber tires for cracks or other damage.
Some cracking is allowable. Observe the progress of cracks
from one check to the next.
1.3 Rotate the rubber wheels by hand and check for free rotation
and bearing noise.
1.4 Inspect all polyurethane wheels visually for damage to tread and
free rotation of bearings.