A 3rd party service organisation
attends the quarry to sample the crusher’s oil and change
filter elements. A regular service interval was
set at 500h after which the oil was
sampled and virtually always declared dirty
enough to be ‘scrapped‘ and changed.

The ALH‐29 was fitted within 1h to the machine.
A simple T‐piece was inserted to the pressure line off
the main supply to the Jaw Crusher just before the
pressure line filter. NTZ bleeds a small amount of oil
from the system and filters it before returning it to
tank. A spare port on the reservoir was uncapped
for the oil return to reservoir.

An oil sample was taken which showed
an ISO cleanliness roughly that of new oil. At 500h the oil was sampled and found to be still fairly
clean. At 2000h the oil
was in fact found to be of an immaculate cleanliness
– servo valve levels of cleanliness.

The success of the NTZ is reducing hydraulic costs by about £800 for every 500h of use.