8 . TROUBLESHOOTING
8.6
Challenger MT500B EU
8.2 - HYDRAULIC CIRCUIT TROUBLE-
SHOOTING
8.2.1 - Remote controlled ram will not retract
Hoses not connected correctly or not paired up. Check hos-
es and tighten connections.
Coupling lever in CLOSED position. Move lever to OPEN
position.
8.2.2 - Remote controlled ram will not extend
Hoses not connected correctly or not paired up. Check con-
nections.
Coupling lever in CLOSED position. Move lever to OPEN
position.
Flow rate regulation control is closed on remote controlled
ram.
Ram overloaded.
Implement design does not allow piston to travel complete
stroke or implement linkage is obstructed. Check ram is
correctly fitted to implement and ensure ram can complete
full travel.
Implement hitch linkage mechanism seized up. Clean, lu-
bricate or straighten linkage.
Rams leaking internally. Consult your Dealer.
8.2.3 - Lift arms do not lift
Electronic linkage control not activated. Activate linkage as
indicated in Chapter 4.
Electronic linkage control not calibrated. Consult your Deal-
er.
Linkage hook overloaded. Load must not exceed limits in-
dicated in Chapter 4.
8.2.4 - Pump does not supply sufficient pressure to
lift normal load
Pump malfunctioning. Consult your Dealer.
8.2.5 - Control valves do not return to idle position
at end of ram travel
Control valve notch adjustment screw is not correctly set
or driver has not moved control lever enough to allow en-
gagement in notch. Move lever forwards or backwards
through its full travel. (Drawbar adjustment may be neces-
sary). With control valve in floating position, manually move
ram control lever to idle position. Refit control lever lock-
nuts to work without floating position.
Selector or spool valve seized up. Move hydraulic control
lever to LIFT or LOWER positions several times to try to
cancel seizing up.
Return mechanism leaking internally. Consult your Dealer.
8.2.6 - Control valves reach idle position before ram
reaches end of travel
Control valve notch adjustment screw set incorrectly.
Driver has not moved control lever enough to allow en-
gagement in notch. Move lever forwards or backwards
through full travel. (Drawbar adjustment may be neces-
sary).
Notch springs broken or holding grooves worn. Consult
your Dealer.
8.2.7 - Oil foam forming at breather outlet
Oil level too high. See final transmission / hydraulic system
oil instructions in Chapter 5.
Oil level too low. See final transmission / hydraulic system
oil instructions in Chapter 5.
Incorrect oil type in tank. See final transmission / hydraulic
system oil instructions in Chapter 5.
Pressure relief valve burnt. Consult your Dealer.
Air leak in circuit. Consult your Dealer.
8.2.8 - Oil leaks at accessories level
Connection loose. Check tightness.
Threads damaged. Fit new piping or accessories if re-
quired.
8.2.9 - Spool valve union disconnects when under
load
Male union type incorrect.
Hoses incorrectly fitted to trailed implements. Fit hoses via
stirrups to supports to prevent them from hanging behind
the hitch mechanism union.
Tractor driving on very rough ground. Fit hoses of trailed
implements to supports to prevent the slack from swinging
between the hitch mechanism and support.
8.2.10 - Remote controlled ram linkage mechanism
warped
Implement prevents piston from travelling full stroke.
Check and adjust the implement so ram rod can travel full
stroke.
Implement linkage mechanism seized up. Straighten and
lubricate mechanism.
8.2.11 - Tank losing oil
External leakages. Repair or replace hoses, attachments,
pipes, seals, etc. as required.
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