Pump; Hydraulic System, Z-Version; Emergency Operation - Liquid System - Hardi NAVIGATOR 3000 Operator's Manual

Pump

FAULT
Liquid leaks from the bottom of the pump.
Grease leaks from the bottom of the pump.
Grease leaks from the shaft grease seals.
Lack of pressure.
Vibrations in system and unpleasant noise from the
pump.
Lack of flow/capacity.
Extreme internal erosion on diaphragm covers and
housing.
Short lifetime for diaphragm.

Hydraulic System, Z-version

FAULT
ParaLift™ lock does not lock.
Boom lift raises to max. position, when tractor
hydraulics are engaged.
Oil heats up in Closed Center systems.
Individual hydraulic piston does not move.
÷
NOTE! See the "Fault Finding" chapter of the "Boom Operator's Manual" for more information.

Emergency operation - Liquid system

In case of power failure it is possible to operate all functions of the operating unit manually. First disconnect the multi plug
from the control box. Now manually turn the emergency control knobs.
The problem may be due to a blown fuse. A fuse is placed inside the box. Fuse type: Thermo
PROBABLE CAUSE
Damaged diaphragm.
Grease used has too low viscosity.
Grease used has too low viscosity.
Bearings worn/too high friction.
Pump valves are clogged or defective.
Clogged filters in fluid system.
Pump valves are clogged or defective.
Air is being sucked into system.
Internal wear on connecting rod and ring.
Pump valves are clogged or defective
Too high vacuum caused by clogged suction filter or
excessive pump speed (r.p.m.).
Lack of internal cleaning.
Lack of conservation of the fluid system during
storage.
Over speeding of the pump
PROBABLE CAUSE
Back pressure in return line exceeds 220 psi (15 bar). Connect the return line with a free flow to hydraulic oil
Bypass valve does not close properly.
Internal leaks in flow regulator.
Clogged restrictor.
7 - Fault finding
CONTROL/REMEDY
Replace diaphragm. See maintenance section.
Change to recommended grease type.
Change to recommended grease type.
Replace pump bearings and grease seals.
Check for obstructions or, if needed, replace valves.
Clean all filters.
Check for obstructions or, if needed, replace valves.
Check for leaks, pinholes in suction hoses, tightness/
gaskets/O-rings of all fittings on the suction side.
Poor greasing. Replace parts as needed and observe
proper grease quality and intervals.
Check for obstructions or, if needed, replace valves.
Replace affected pump parts.
Clean suction filter and observe maximum pump
speed (r.p.m.).
Use recommended cleaning procedures and add
extra cleaning agents (e.g. AllClearExtra or similar).
Always use a proper mixture of anti-freeze during
storage.
Observe maximum pump speed (r.p.m.).
CONTROL/REMEDY
reservoir.
Divide return line in two and lead return oil back to
reservoir via two spool valves.
Check / close (screw in) by-pass valve.
Replace flow regulator O-rings and backup rings.
Replace flow regulator.
Dismantle and clean restrictor.
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