Mec 65-J Diesel, Руководство по обслуживанию и запасным частям

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Page 115 65-J Desel - Servce & Parts Manual
February 2021 Secton 19 - Troubleshootng
No High Speed
Speed selector switch inoperative Check continuity through Speed Select switch with wires disconnected
2-speed valve SV9 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# 2E1, P5-
9).
Boom Retract proximity switch
failure Check for power ground & signal output to Proximity Switch located
inside the rear of boom. Also check EZ-Cal 2C1, P14-10 for input
Problem Possible Cause Remedy/Solution
Steer
No steer in either
direction
Joystick rocker switch inoperative
Check continuity through micro-switch inside joystick handle using
wires outside the handle. Check output (see EZ-Cal 2C2, P10-7 and
P7-8).
Steering valve 5 inoperative
Check steering valve for power. Check for damage and contamination.
Check output from GP400 (see EZ-Cal ID # 2E1 P5-2 and P5-3).
Inspect/replace steering valve.
Hoses connected incorrectly See Section 25 - Hydraulics for correct connection.
Steer cross-port relief valve(s) 3-1
and 3-2 set too low Set steer relief valves to 1500 PSI (103 bar). See hydraulic diagram
for relief valves location.
System interlock Check EZ-Cal HELP messages for interlock
Steer in one direction
only
Joystick rocker switch inoperative
Check continuity through micro-switch inside joystick handle using
wires outside the handle. Check output (see EZ-Cal 2C2, P10-7 and
P7-8).
Steering valve 5 inoperative
Check steering valve for power. Check for damage and contamination.
Check output from GP400 (see EZ-Cal ID # 2E1 P5-2 and P5-3).
Inspect/replace steering valve.
No power to steering coil
Check for power and ground in both directions. Repair wiring. Check
output from GP400 (see EZ-Cal I.D. #s 2F-11 right & 2F-12 left).
System interlock Check EZ-Cal HELP messages for interlock
Will steer but not fully or
slow steering
One or both steering cylinder
internal seal failure
Check/replace steering cylinder seals.
Steer cross-port relief valve(s) 3-1
and 3-2 set too low Set steer relief valves to 1500 PSI (103 bar). See hydraulic diagram
for relief valves location.
King pin/s seizing in the bore Disassemble and inspect. Replace bushings.