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160XT
180XT
210XT
22 GENERAL INFORMATION OF HYDRAULICS
Activation of any of the movements requires that three electric valves be in operation
simultaneously. The retraction of the telescope is an exception, as it requires
simultaneous operation of two valves only. The valves are: the flow regulation valve (PR),
the selection valve boom/chassis (1B) and the control valve for the movement in
question. Using the selection valve boom/chassis is not required for retraction of the
telescope.
Valves: 3. Main pressure limit 4. Pressure limit for extension of the
telescope
6. Pressure limit for turning 7. Adjustment of the platform's
levelling speed
8A/B. Load regulation for levelling of
the platform
1A/1B-selection "boom/chassis" PR-Flow regulation valve (Propo)
SV/SP-Articulated arms NV/NP-Lifting of the boom
MV/MP-Levelling of the platform O/V-Turning of the boom
ZV-Retraction of the telescope ZP-Extension of the telescope
To control the valves manually in the case of malfunction, press the pins at the end of the
electric valves. Take into account, when you operate valves manually, that you can only
activate those movements that bring the work platform lower.
If the movements operate when controlled manually, the fault is in the electric system of
the operating controls or the valve spools are dirty, which causes jamming (refer to the
fault finding scheme, point 6).
If none of the movements operate, the fault is in the hydraulic system.
Courtesy of Crane.Market
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