Oil temperature?
Viscosity?
Suction vacuum
A4VG
Vacuum
min ≥ 0.8 bar absolute
temporarily during cold start
≥ 0.5 bar absolute
Starting speed
Check pump A4VG
Rated value * rpm
P
HP
= 50 bar
P
St
= * bar
P
SP
= * bar
Wrong oil type/viscosity
- Run the machine warm
- Suction lter dirty, etc.
See “No forward/reverse machine
travel”
New position
- Check the boost pressure
- Check the inching valve
- Control initiation adjustment
See “No forward/reverse
machine travel”
ok
yes
no
Measuring point F
S
no
no
Machine parked on level ground?
yes
Troubleshooting as in “No forward/re-
verse machine travel”
yes
See “Machine travel starts too
early”
Measuring point:
M
A
/M
B
P
St
Measurement connection
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