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ORV 10 - ORV 12 - ORX 10 - ORX 12
Problem Possible faults Corrective actions
4. (continuation) e. Loading solenoid valve (LV) leakage.
f. Oil separator element clogged.
g. Air intake throttle valve (TV) remains partially
closed.
h. Safety valve (SV) leaking.
i. Bleed-off valve (BOV) leaking.
e. With unit running at max. load speed,
disconnect hose leading to venting device
from valve. If air leaks, remove and inspect
valve. Replace damaged or worn O-rings.
f. Replace oil separator element.
g. Remove air filters, air intake manifold and
throttle valve spring seat. Withdraw throttle
valve and inspect. Replace parts where
necessary.
Caution: the spring seat is fixed with 4 short
and 2 long setscrews: first remove short
screws, then release spring tension by
alternately unscrewing the long ones.
h. Remove and inspect safety valve. Replace
valve if not airtight after reinstallation.
i. Remove and inspect bleed-off valve.
Replace valve if necessary.
5. Pressure in air receiver
(AR) rises above maximum
and causes safety valve
(SV) to blow.
a. Regulating valve (RV) opens too late or its ball
valve spring is broken.
b. Air leaks in regulating system.
c. Air intake throttle valve (TV) does not close for
some reason.
d. Minimum pressure valve (MPV)
malfunctioning.
e. Bleed-off valve (BOV) malfunctioning.
a. Adjust regulating valve. Dismantle and
inspect parts if valve does not respond.
Replace where necessary.
b. Check hoses and their fittings. Stop leaks;
replace leaking hoses.
c. See corrective action 4g.
d. Remove and inspect minimum pressure
valve. Replace if necessary.
e. Remove and inspect bleed-off valve.
Replace if necessary.
6. Air and oil mist expelled
from air filters (AF) and
also from overpressure
valve (OV) on gear casing
(GC) after stopping.
a. If mainly air: check valve (CV) or by-pass
valve (BV) excessively leaking or defective.
b. If mainly oil: plunger of oil stop valve (OSV)
jammed or oil stop valve defective.
a. Remove valve and inspect. Replace valve if
necessary. Replace air filter elements and
safety cartridges. Check the oil level and
add oil if necessary. Run the unit for a few
minutes, stop and recheck the oil level.
b. See corrective action 6a.
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