C300H / C300HI / C300H x4 / C300HI x4
C350H / C350HI / C350H x4 / C350HI x4
134
Transmission Troubleshooting
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 counter
wise 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 vacuum
gauge
Vacuum filter < 0,3 bar
Inching is seized, disco
meeted or badly connected
(SAUER)
Potentiometer, 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, fittings 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
over speed
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
Insufficient
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
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