HYDRAULIC SYSTEM CD5515-2/YB5515-2 SERVICE MANUAL
4-6 Published 1-20-2017, Control# 483-02
Table 4-4
Outrigger Circuit Troubleshooting
Boom retracts but will not extend Malfunction in anti-double blocking
electrical system.
See Electric System.
Bad cartridge in anti-double blocking
solenoid valve.
Replace the cartridge
Restriction in pilot control line to control
valve.
Check and correct.
Faulty controller. Repair or replace control valve.
Boom slow at extending. Restriction in boom sections. Clean and lubricate boom slides. See
Chapter 5, 1.
Problem Possible Cause Remedy
Problem Possible Cause Remedy
No movement all cylinders Electrical problem. See Chapter 3, 1.
Dirt or restriction in the dump valve. Clean or replace the dump valve.
Dirt in relief valve keeping the valve off
the valve seat.
Clean the relief valve.
Relief valve setting too low. Check and adjust the relief valve
setting.
Faulty pump section. Overhaul or replace the pump.
Slow movement all outriggers. Low engine rpm. Increase engine speed.
Solenoid valve on outrigger valve
section not fully actuating the valve
spool.
Check for restriction or binding in the
solenoid valve.
Leakage in relief valve. Clean or replace the relief valve.
Slow movement, one cylinder. Internal leakage in the cylinder Replace piston seals.
Outrigger lowers but will not raise. Problem in electrical circuit. See Chapter 3, 1.
Faulty lock valve in base of the
cylinder.
Replace counterbalance valve.
Outrigger cylinder does not hold under
load.
Leakage in counterbalance valve in
base of cylinder.
Clean or replace counterbalance
valve.
Internal leakage in cylinder. Replace piston seals.
Outriggers only on one side. Faulty control valve section. Repair or replace valve section.
Faulty solenoid valve or open circuit to
solenoid valve.
See Chapter 3, 1.
Faulty selector valve. Replace selector valve.
Restriction or dirt between the
outrigger valve spool and housing.
Remove and clean the outrigger valve
spool.
Reference Only
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