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 4a-31
T
R O U B L E S H O O T I N G
- 3 0 8 4 R T
M O D E L S
- - T
R O U B L E S H O O T I N G
C
H A R T
No low speed
(high torque mode)
Speed/Torque switch inoperative Check continuity through Speed Select switch with wires
disconnected terminals 2 & 1
Valve SV3 not functioning Check for 12 volts and ground to valve
Check for faulty valve spool
Check switch position output from GP400
(See EZ-cal ID# 2f-17)
EP1 poppet valve not functioning Check or replace valve (see hyd schematic for location)
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 Terminals 1 or 3 are common with terminal 2 when switch
is in mid position
No High Speed Speed/Torque selector switch inoperative Check continuity through Speed Select switch with wires
disconnected terminals 2 & 3
Valve SV4 not functioning Check voltage and ground to valve
Check for faulty valve spool
Check switch position output from GP400
(See EZ-cal ID# 2f-18)
EP2 poppet valve not functioning Check or replace valve
No Speed Selection Limit switch not functioning Check limit switch located on left rear of base
Check limit switch input with EZ-Cal (EZ-Cal ID# 2d5)
Steer
No steer in either
direction
Lift/Drive selector switch in the Lift
position Switch must be in Drive position for steer operation
Joystick rocker switch inoperative Check continuity through rocker switch on green and yellow
wires (right & left) with blue wire (input).
Steering valve inoperative Check steering valve for power or damage
Check switch position output from GP400
(see EZ-cal ID # 2f-12 & 2f-13)
System Interruption Check HELP messages using EZ-Cal
Hoses connected incorrectly See hydraulic section for proper connection
Pressure relief valve set too low Set steer relief valve to 2000 p.s.i.
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
Check switch position output from GP400
(see EZ-cal ID#s 2f-12 right & 2f-13 left)
System Interruption Check HELP and MODE message on EZ-Cal
Steers, but not fully, or
steers slowly
One or both steering cylinder seals failed Check steering cylinder seals – replace
Pressure relief valve set too low Set steer relief valve to 2000 p.s.i.
King pin/s seizing in the bore Disassemble and inspect
Repair
Replace bushings
Table 4a-4: Troubleshooting Chart
PROBLEM POSSIBLE CAUSE REMEDY/SOLUTION