AUSA plus T 144 H, Manual

Page: 48 / 49

5.5 IDENTIFICATION OF DEF ECTS IN HYDRAULIC
TRANSMISSIONS
INSTRUCTIONS FOR THE IDENTIFICATION OF FAILURES IN HYDROSTATIC TRANSMISSIONS
FAILURES POSSIBLE CAUSE CHECK LOCATION CORRECT VALUES
The machine
does not
move neither
forward nor
reserve
Oil Level is low Oil level Oil tank
Suction hose is bent or squashed Suction hose
Hydraulic oil cartridge is clogged Depressor marked in vacuum gauge Suction filter < 0,3 bar
Faulty coupling Motor or pump coupling
Pre-load pump turns counterwise to engine
Load pressure
Pressure intake with a gauge on
pump sport M3 (SAUER GROUP)
or S (BOSCH REXROTH GROUP)
20 ÷ 24 bar Faulty pre-load pump
Faulty oil motor
Directional solenoid does not work
Resistance and voltage Control box
(SAUER)
Directional solenoids in pump
Inching is seized, disconnected or badly set
(SAUER)
Throw and connections Pedal and electric connections
Faulty oil strainer
Faulty oil suction Seadling of tubes
connectors and suction
Oil connections
Non instant
motion
response,
abnormal
Oil is air emulsified or Oil level is low
Oil level seating of pipes / hoses,
fittings
Oil tank, fittings
Vacuum filter is clogged Depressor marked in vaccum gauge Vacuum filter < 0,3 bar
Inching is seized, disco meeted or badly
connected (SAUER) Potentionmeter, linkage and
connections
Pedal and electric connections
Engine is
overloaded
Low engine power or faulty engine
Engine does not accelerate at max.
Load
Engine
85 ÷ 95 % max rpm. of
engine
High pressure limit is set too low Working pressure Working pressure ports in pump
Recommended max.
Pressure 345 or 410 bar.
Inching is seized (SAUER) Potentiometer / linkage Pedal < 0,3 bar
Low traction
power
Engine does not work at nominal level or it’s over Haul of accelerator lever Engine
85 ÷ 95 % max rpm. of
engine
Low load pressure Load pressure
Pressure intake with a gauge on
pump sport M3 (SAUER GROUP)
or S (BOSCH REXROTH GROUP)
20 ÷ 24 bar.
Inching is seized (SAUER) Potentiometer / linkage Pedal
M4, M5 (SAUER) or Xa, Xb (BOSCH REXROTH)
Piloting hoses of hydrostatic motor are reversed.
Hydraulic chart Connections
Hydraulic Oil overheating Dirt in radiator Radiator oil
Hydraulic oil
overheating
Low oil level Oil level
Oil tank
Faulty oil Oil degradation an pollution
Suction line is not sealed
Sealing for hoses, fitchings and
cartridge
Oil connections
Faulty high pressure relief valves Working pressure Working pressure ports in pump
Recommended max.
Pressures 345 or 410 bar.
Radiator is dogged Dirt in radiator
Transmission
overspeed
Max. Engine RPM is higher than recommended Max. RPM on the engine Engine
Faulty hydrostatic motor. Does not move to max.
flow.
Irregular
running M4, M5 (SAUER) or Xa, Xb (BOSCH REXROTH)
Piloting hoses of hydrostatic motor are reversed.
Hydraulic Chart Oil connections
Insuficient
acceleration
Low engine power Haul of accelerator lever Engine
M4, M5 (SAUER) or Xa, Xb (BOSCH REXROTH)
Piloting hoses of hydrostatic motor are reversed.
Hydraulic Chart Oil connections
TAURULIFT T144H x4 Plus