SANDVIK CH420:01, Руководство по установке

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4. Installation preparations
55 CH420:01 © Sandvik SRP AB – Doc. no. S 223.510 en Ver. 1
4.4.2 Low temperature problems –
symptoms and remedies
Start
Oil returns to the tank, but
not in sufficient quantity.
Wait 3.5 min. to drain the
crusher and then make a
new attempt to start up.
Start the oil pump. Does
the “Crusher ready for
start” signal appear within
40 s?
There is a blockage in the
return oil line. Clean out the
blockage. If necessary,
install heating cables on the
return oil line. Does the oil
flow back to the tank?
Has the crusher started
and continued to run nor-
mally?
Start crushing when the
crusher has warmed up.
Stop the oil pump. Has oil
run back through the oil line
to the return oil flow switch?
Does the crusher stop
due to interruptions in
return oil flow?
The ambient air tempera-
ture is too low, which
makes the oil cooler too
effective. The oil is
slowed down and blocks
the passages in the radi-
ator core!
Blank off the radiator
completely or partially.
Start with 50% blanked
off.
Alternatively, fit a 2-speed
motor to the cooling fan.
Has oil overflowed over the
dust collar?
During long periods with
very low temperatures,
the crusher should be
heated during the night
to avoid excessive cool-
ing. Position a fan heater
beneath the crusher and
cover the feed opening.
In addition, the lubrica-
tion oil pump can be run
continuously.
Install a thermostatic valve
to by-pass around the oil
cooler. Does oil flow back
to the tank?
Under very low tempera-
tures the radiator core
can be “thawed out” with
a fan heater.
Install low temperature
equipment in the tank.
(Heating in component sec-
tion, insulated tank bot-
tom, time delay for oil
monitor interlocks.) Does
oil flow back to the tank?
Alternatively, use an ISO
VG 100 oil.
Change to synthetic oil.
Does oil flow back to the
tank?
Install heating cables on the
oil lines. Does oil flow back
to the tank?
Insulate the oil tank. Does
oil flow back to the tank?
Sometimes it can be advisa-
ble to run the lubrication oil
pump continuously to mini-
mize starting problem
No
Yes