Thomas 135 - System will Not Operate in Either Direction

2-8
2
TROUBLE SHOOTING 2.4
Symptom: System Will Not Operate In Either Direction
Repair or
replace
Fill to proper
level
Replace
Repair or
replace
Reduce sys-
tem load
Repair or
replace
Repair or
replace
Defective
Defective Clogged
Defective
High
Low
Defective
OK OK
OKOK
OKOK
Inspect inlet
screen or filter
Inspect motor
Check sys-
tem pressure
Replace pump
and motor
Inspect charge
relief valve
Inspect charge
pump
Check charge
pressure
Check external
control linkage
Check oil level
in reservoir
Below level
OK
OK