S150/S151/S152/Z152
9-2
9
Troubleshooting
Malfunction
Probable Cause
Remedy
Engine
Refer to engine manual
Engine will not start
Drive selector (4-7/3) not in
Put drive selector in neutral
neutral
Loader arm cannot be lifted or
Pressure valve in in control valve
Remove pressure valve, clean and
dropped
may be open
re-calibrate
*
Control valve for main hydraulics
Unlock control valve (1-2/1)
(4-7/2) locked
No pilot pressure or pressure
Open pressure valve in control
too low
circuit, clean and re-calibrate
*
Diesel engine failure
Use residual pressure to lower the
loader arm to the ground imme-
diately after engine failure
More force required for steering
Pressure valve in steering unit
Remove pressure valve, clean and
may be open
re-calibrate
*
Slide valve in priority valve
Replace priority valve
blocked
Swivel assembly (1-4/arrow) fails
Swivel mechanism may be
Remove swivel assembly block and
to rotate
blocked
store in holder
Pressure valve in control valve
Remove pressure valve, clean and
may be open
re-calibrate
*
Support failure
Cut-off valve switch in frame under
Rotate loader arm in direction of
swivel assembly jammed
travel; free arm
Support failure when loader arm is
Non-return valve in pressure hose
Rotate loader arm in direction of
lowered in swivelled state
open
travel, remove non-return valve
clean and refit or replace
*
9
Troubleshooting
NOTE
*
) These tasks to be performed by authorized staff only
i
Summary of Contents for AS 150
Page 7: ...Safety regulations ...
Page 19: ...Signs ...
Page 22: ...Anti TheftProtection ...
Page 25: ...Description ...
Page 34: ...Operations ...
Page 46: ...Attachments ...
Page 54: ...Rescue Towing Lashing Crane Lifting ...
Page 61: ...Maintenance ...
Page 80: ...Troubleshooting ...
Page 83: ...Wiring and Hydraulics ...
Page 98: ...Technical Data Equipment ...
Page 103: ...Technical Data Attachments ...
Page 112: ...Optional Extras Changes ...