42
HARDI
®
FORCE™ BOOM OPERATOR’S MANUAL
‘DH’ Hydraulics
Problem
1. Hydraulic cyl in der only moves
one way.
2. One hydraulic function will not
operate.
10.2 Mechanical Problems
Problem
1. Boom will not completely fold in
or out.
2. Boom not in alignment.
3. Boom won’t stay in spray
po si tion.
4. Breakaway won’t hold outer wing
stable.
Solution
A. Check for elec tri cal
operation of Directional
Solenoid Valve.
B. Check hook-up of hydraulic
hoses on Directional
Solenoid Valve block.
P
= Pressure from trac tor
T
= Return to trac tor
A
,
B
= Supply/return to
solenoid block on spray
boom.
A. Check for electronic
operation of di rec tion al
solenoid valve.
B. Check for electronic
continuity through multi-pin
plugs.
Solution
A. Adjust the fold cylinder.
(Section 7.2B,D & 7.5)
B. Adjust stop bolt (Sec 7.2B,D)
A. Check for hydraulic leak
through solenoid block.
B. Check for a solenoid that is
stuck open.
C. Re-adjust boom section
(Sec
7.2)
A. Recharge cylinders by
completely folding in the
boom and unfolding the
boom.
B. Check for hydraulic leak
through solenoid block.
C. Check for a solenoid that is
stuck open.
A. Adjust breakaway (Section
7.2F), replace clutches if
worn.
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