UNDERCARRIAGE RT530E-2 SERVICE MANUAL
8-26 Published 4-22-15, Control # 556-00
Slow or erratic operation of
outrigger extension cylinders.
(continued)
q. Partially shifted hydraulic
spool in selector valve or
manifolds.
q. Disassemble, clean, and
polish spool and valve
housing with very fine emery
cloth (water paper).
r. Insufficient voltage for
operation of solenoid valve.
r. Solenoids require a minimum
of 9.5 volts to energize. Check
outrigger wiring and electrical
coupling collector rings.
s. Damaged piston seals. s. Replace all cylinder seals.
t. Worn or damaged hydraulic
pump section.
t. Repair or replace pump
section.
u. Scored cylinder barrel. u. Repair or replace extension
cylinder.
v. Cracked or damaged piston. v. Replace rod weld and all
cylinder seals.
w. Piston loose on piston rod. w. Replace all cylinder seals and
torque piston locknut.
2. Sticking spool. a. Dirt in the system. a. Change oil and flush system.
b. Distortion caused by tie bolts
being overtorqued.
b. Retorque tie bolts.
c. Flow in excess of valve rating. c. Limit flow through valve to that
recommended. Check pump
output and cylinder ratio.
d. Pressure in excess of valve
rating.
d. Check relief valve setting or
pump compensation with that
recommended.
e. Electrical failure. e. Check wiring and solenoids.
3. External leakage. a. Damaged O-ring or quad
rings.
a. Check for chipped packings
and replace.
b. Loose tie bolts. b. Retorque tie bolts.
c. Damaged solenoid. c. Replace damaged parts.
4. Solenoid failure. a. No current. a. Check power source of at
least 85% of coil rating.
b. Damaged solenoid assembly. b. Replace solenoid.
c. Short in solenoid. c. Replace coil.
d. Loss of
solenoid force. d. Decrease time
of solenoid
energization, decrease cycle
rate.
Symptom Probable Cause Solution
Reference Only
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