Mec Speed Level 2684 ES, Руководство по обслуживанию и запасным частям

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“3084 Speed Level™ Sigma Lift” Service and Parts Manual November 2009
Page 4b-31
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R O U B L E S H O O T I N G
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M O D E L
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R O U B L E S H O O T I N G
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H A R T
No drive elevated Unit out of level Lower and re-position the machine.
Batteries discharged Will receive 4-4 or 7-7 flash on GP400. Clean, service and
charge batteries.
Battery charger may not operate if battery voltage drops
below 20 volts
System interlock Check HELP messages using EZ-Cal
Slow drive with
platform in stowed
position
High torque enabled Check Speed/Torque Switch at platform controls
Elevation sensor out of calibration Use EZ-Cal to monitor platform state of elevation. See
Diagnostic chart I.D. 2a13 for elevated status and 2e1 for
platform % of elevation input. Failure of the angle transducer
will trigger a fault code.
Malfunctioning rear wheel bypass valve Located on rear wheel motors only. Check by replacing
valves.
Wheel motor/s not functioning correctly Inspect wheel motors for excessive bypass
Poor gradability
performance
High or Mid Speed enabled Check Speed/Torque Switch
Batteries discharged Will receive 4-4 or 7-7 flash on GP400, Clean, service and
charge batteries.
Battery charger may not operate if battery voltage drops
below 20 volts
Wheel motor/s not functioning correctly Inspect wheel motors for excessive bypass
Malfunctioning Rear wheel bypass valve Located on rear wheel motors only. Check electrical by
disconnecting valves or function by replacing valves
Malfunctioning Series/Parallel Valves Located on top of main hydraulic Manifold
Worn hydraulic pump Check with flow meter or replace pump
Drive in one direction
only
Drive Valve SVD1 not energizing in one
direction Check 12 volts to appropriate coil, check coil, check valve
function
Counterbalance Valve CBV1 or CBV2
malfunction Swap counterbalance valves to see if functioning direction
changes.
No output from GP400 Scan using EZ-Cal and troubleshooting charts. EZ-cal chart
I.D 4f-7 - Fwd or 2f-9 - Reverse
No Low Speed (high
torque mode)
Speed/torque selector switch inoperative Check continuity of Speed/Torque switch in platform control
box
Valve SV3 not functioning Check for 12 volts and ground to valve check for faulty valve
spool
EP1 poppet valve not functioning Check or replace valve
No Mid Speed SV3 or SV4 powered and/or shifted These valves should not have 12 volts, in mid-speed, check
valve function
Speed/torque selector switch malfunction Check continuity through switch
No High Speed Speed/torque selector switch inoperative Check continuity of Speed/Torque switch in platform control
box
Valve SV4 not functioning Check voltage and ground to valve check for faulty valve
spool
EP2 poppet valve not functioning Check or replace valve
No brake effectiveness Brake Orifice OD-1 obstructed Remove, clean orifice. See hydraulic diagram for location in
manifold.
Brake discs worn past service limit Replace brake discs located inside rear wheel motors.