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Terex RT700 - Operator Controls Troubleshooting

Terex RT700
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TROUBLESHOOTING
OPERATOR - CONTROLS
NO MOVEMENT OF THE FUNCTION
Check to see that valve spool actuates when control is oper-
ated.
If spool shifts, refer to sections on 1) Relief Valve Trouble-
shooting; 2) Motor, Cylinder or Winch Troubleshooting ac-
cording to circuit being checked; 3) Pump Troubleshooting;
4) Control Valve Troubleshooting.
WITH THE ELECTRICALLY CONTROLLED VALVES
on the outriggers, three (3) spools must be checked.
The diverter valve should be checked by using a test gauge on
the test port and activating the outrigger controls. If pressure
(2500 psi) is indicated, the spool is shifting.
Check the outrigger extend-retract and function valves by
pushing the. pins in prior to activating the functions. Check to
see if the appropriate pin has been pushed back out as the
functions are activated. If they have, the spools are shifting.
If the spools do not all shift, check the electrical connections.
Frequently ground connection are a problem.
If no electrical power is present at the valve, check the elec-
trical wiring and correct the fault. Most controls require a
minimum of 10 volts.
If power is present, repair or replace the solenoid or valve sec-
tion which is not shifting.
If the spools shift, see page 5-19, “Outrigger Cir- cuit”.
RT700 Series Page 5 - 3 Issued: August 2003

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