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-32
T
R O U B L E S H O O T I N G
- 3 0 8 4 E S
M O D E L
- - T
R O U B L E S H O O T I N G
C
H A R T
LIFT AND DRIVE
No drive or lift
operation motor
operates
Main Relief Valve RV-3 out of adjustment For test purposes, swap RV-3 with RV-2.
Pump or pump coupler failure Inspect, replace as necessary
Diverter Valve EC-1 malfunction Inspect, replace as necessary
Hydraulic tank empty Check, fill with approved oil
No drive or lift
operation motor does
not operate
Motor malfunction Inspect, replace as necessary
System interlock Check HELP messages using EZ-Cal
Battery 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.
STEER
No steer in either
direction
Joystick rocker switch inoperative Check rocker switch output on green and yellow wires, input
on blue wire.
Steering Valve SV-2 inoperative Check steering valve for power or damage.
System interlock Check HELP messages using EZ-Cal
Hoses connected incorrectly See hydraulic section for correct connection.
Pressure Relief Valve RV-2 set too low Set steer relief valve to 2000 PSI
Steers in one direction
only
Steering Valve inoperative or stuck Inspect; replace steering valve
No power to steering coil Check for power and ground in both directions, repair wiring
System interlock Check HELP messages using EZ-Cal
Steers but not fully or
steers slowly
One or both steering cylinder internal seal
failure Check steering cylinder seals, replace
Pressure relief valve set too low Set steer relief valve to 2000 PSI
King pin/s seizing in the bore Disassemble and inspect, repair, replace bushings
Wheels do not stay in
position while driving
One or both steering cylinder internal seal
failure Check steering cylinder seals, replace
Steers uncommanded Steering Valve SV-2 sticking or damaged Remove and inspect for visible debris and stem
straightness, clean with solvent and air
Check Valve CV-1 or CV-2 damaged or
contaminated with debris Remove and clean or replace check valves see hydraulic
diagram for manifold location
LEVEL, AUTO & MANUAL
No level operation Platform is in elevated position or is
perceived to be in the elevated position.
Elevation is monitored by a sensor located
on left-rear portion of the scissor stack. 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.
System interlock Check HELP messages using EZ-Cal
Level switch/s inoperative Check level switch located in the upper control box
Directional pressure valve not functioning Located behind lower control box. Inspect valve for loss of
power, ground or damage.