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III-3
Diag VI
Mast raising problems
- Impossible
- reduced speed
Low pressure (<9MPa)
Adjust the mast elevation
pressure relief valve.
Remove and inspect the relief valve.
Remove and inspect the shuttle valve
located under the emergency control
valve.
Check / replace the flow regulator.
Check / replace the load holding
valve.
contact JLG Product Support.
Models
Toucan 861
Updated 04-06
BREAKDOWN
Measure the pressure during the movement
Impossible
Correct
Correct
Preliminary checks :
This movement is the only one affected.
No external leak.
Battery charged correctly.
Battery connections in good condition.
The machine is on flat and horizontal ground.
Normal pressure (9-16MPa)
Excessive friction.
Inspect / clean / grease.
Adjust the mast.
Incorrect Clean and/or replace the seals
and/or replace the relief valve.
Incorrect Clean and / or
replace the shuttle valve.
III-3
39
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