Operator Controls
WITH THE ELECTRICALLY CONTROLLED VALVES on the outriggers, three (3) spools must
be checked.
On the T300-1 and T500-1 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. The T775 has two reliefs, one for the Swing, A/C and Counterweight
removal set at 3500 psi, the other relief is for the outrigger controls set at 2500 psi.
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 electrical wiring and correct the
fault. Most controls require a minimum of 10 volts.
If power is present, repair or replace the solenoid or valve section which is not shifting.
If the spools shift, see page 5-26, “Outrigger Circuit”.
387P/N 12261-683 REVISED: January 2015
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