System Operating Hot; System Will Not Operate In Either Direction - Sauer Danfoss 20 Series Service Manual

SYSTEM OPERATING HOT

Check fluid
level in OK
reservoir
to Low
Fill to
proper level

SYSTEM WILL NOT OPERATE IN EITHER DIRECTION

Check fluid
Check control
level in OK
reservoir
to Low
Fill to
propper level
OK
(see Series20 Axial Piston
Pumps, Service Manual
and Repair Instruction)
(see Series20 Axial Piston
Pumps, Service Manual
and Repair Instruction)
(pump + motor)
12
Series 20 – Axial Piston Motors
Service Manual and Repair Instructions
Trouble Shooting
Inspect heat
OK
exchanger
Defective
Repair
or replace
Inspect motor
OK by-pass valve
linkage
Defective
Repair
or replace
Inspect
charge pump
OK
Defective
Repair or replace
Replace
transmission OK
(see Series20 Axial Piston
Pumps, Service Manual
and Repair Instruction)
(see Series20 Axial Piston
Pumps, Service Manual
and Repair Instruction)
DKMH.PS.330.C1.02 520L0534
Inspect motor
Inspect
OK by-pass valve
inlet filter
(if used)
Clogged Defective
Replace
or replace
Check charge
OK
(see Series20 Axial Piston
Pumps, Service Manual
(if used)
and Repair Instruction)
Defective
to low in
neutral and
forward or
Repair
reverse
or replace
Inspect charge
pressure relief valve
Inspect
OK
(see Series20 Axial Piston
inlet filter
Pumps, Service Manual
and Repair Instruction)
Defective Clogged
Repair or replace
(see Series20 Axial Piston
Replace
Pumps, Service Manual
and Repair Instruction)
Inspect
Inspect motor
control valve
OK by-pass valve
(if used)
Defective Defective
Replace
control valve
or replace
Check system
OK pressure
(see page 13)
Defective
Repair Reduce
machine load
Replace
transmission
(pump + motor)
OK
pressure
to low in
forward or
reverse
to low in
neutral
Inspect purge
relief valve
at motor
(see page 21)
Defective
Repair or
replace the
valve block
(see page 19)
Check system
OK pressure
(see page 13)
Repair
OK