3.1 Introduction
WARNING !
READ HEALTH AND SAFETY PRECAUTIONS
BEFORE YOU START ANY SERVICE WORK.
SERVICING OF THE COMPRESSOR MUST ONLY
BE CARRIED-OUT BY AUTHORISED PERSONS
FULLY TRAINED AND COMPETENT IN THE
MAINTENANCE, MAINS ELECTRICAL SUPPLY
AND STARTER CONTROL EQUIPMENT OF
HYDROVANE COMPRESSORS. THEY MUST
FULLY UNDERSTAND AND ADOPT CORRECT
AND SAFE WORKING PRACTICES.
Routine servicing should be carried out as instructed in the User
Handbook, ensure genuine parts are available for the following
tasks.
3.2 Minimum Pressure Valve (Fig 3.1)
Remove screws that retain the air filter cover to gain access to the
minimum pressure valve.
Renew bonded seal (A) and 'O' ring (B), apply silicon grease before
refitting.
Check piston ©) and valve (D) for wear or damage, renew if
necessary.
Clean filter (E) in white spirit or parafin, apply compressed air to
threaded end of filter, renew if it cannot be cleaned satisfactorily.
Testing of the minimum pressure valve is shown in Section 2.5.
3.3 Pressure Control Valve (Fig 3.2) PUTS/PUAS
Remove the screws that retain the valve cover plate.
Remove pressure control valves (F) and note settings, 7 or 10 bar
(100 psi or 145 psi), renew bonded seals (G)
Renew valves complete if found faulty, ensure new valves have the
same pressure rating as those removed. DO NOT attempt to adjust
or dismantle the valves
Testing of the pressure control valve is shown in Section 2.7
3.4 Safety Valve (Fig 3.2) PURS
Remove safety valve (H) renew bonded seal (G), replace valve if
found faulty, it cannot be dismantled or adjusted.
Testing of the safety valve is shown in Section 2.6
3.5 Oil Separator, Oil Return Valve (Fig 3.3)
Drain compressor oil, remove screws that retain the air filter cover.
Remove end cover (A) note its position relative to the separator
housing (F) for correct location on assembly, renew 'O' ring (B).
Unscrew oil separator ©) and examine, if contaminated or faulty, it
must be renewed, it cannot be cleaned
Renew the oil separator 'O' ring (D) and gasket (E)
Remove the separator housing (F) noting its position relative to the
oil chamber for correct location on assembly.
Renew 'O' ring (G) on separator housing (F), check restrictor plug
(H) in housing to ensure its orifice is clear.
Renew washer (J) on oil return valve (K), renew if contaminated,
replace washers (L) on housing bolts on re-assembly.
Refill compressor with FLUID FORCE RED 2000 or an APPROVED
OIL when assembly is complete.
ST16191-00A Page 5
3.0 Servicing hydrovane
Fig 3.1 - Minimum Pressure Valve
Fig 3.2 - Pressure Control and Safety Valves
Fig 3.3 - Oil Separator, Oil Return Valve
