Trouble Shooting; Transmission Operates In One Direction Only; System Response Is Sluggish - Sauer Danfoss 20 Series Service Manual

TRANSMISSION
OPERATES IN ONE
DIRECTION ONLY

SYSTEM RESPONSE IS SLUGGISH

Check charge
pressure OK
(see page 14)
to low
in
neutral
to low inforward
or reverse
Inspect charge
relief valve at motor
pressure
(see Series 20 Axial Piston
relief valve
Motors, Service Manual
(see page 14)
and Repair Instruction)
Defective
Repair or replace
Repair
or replace
(see Series 20 Axial Piston
Motors, Service Manual
(see page 21,22)
and Repair Instruction)
12
Series 20 – Axial Piston Pumps
Service Manual and Repair Instructions

Trouble Shooting

Check control
linkage
Defective
Repair
or replace
Inspect Inspect motor
control valve OK by-pass valve
(see page 15)
Defective
Replace
control valve
(see page 23)
to low in neutral and
forward or reverse
Inspect purge Inspect charge
(see page 14)
Defective
the valve block
(see page 21,22)
DKMH.PS.315.B1.02 520L0535
Inspect high pressure
relief valve
OK
(see Series 20 Axial Piston
Motors, Service Manual
and Repair Instruction)
Defective
Repair or replace
(see Series 20 Axial Piston
Motors, Service Manual
and Repair Instruction)
Inspect shuttle valve
in valve block
(see Series 20 Axial Piston
Motors, Service Manual
and Repair Instruction)
Defective
Repair or replace
the valve block
(see Series 20 Axial Piston
Motors, Service Manual
and Repair Instruction)
OK transmission
(if used) (pump + motor)
Defective
Repair
or replace
pressure
OK
relief valve
inlet filter
Defective
Repair
or replace
Insert charge
OK check valves
(see page 14)
Defective
Repair
or replace
(see page 21,22)
Inspect control valve
OK
(see page 15)
Defective
Replace control valve
(see page 23)
Replace
Inspect
Inspect
OK charge pump
(see page 14)
Clogged Defective
Replace or replace
(see page 21,22)
OK
OK
Repair