CHECKS
When applicable switch is enabled . . .
Mast Raise Solenoid. . . . . . . . . . . . . . . . . Packet #35, Bank 2 changed by 1
Mast Lower Solenoid . . . . . . . . . . . . . . . . Packet #35, Bank 2 changed by 2
Problem 27
Mast rasing (live mast) cylinders will not raise or lower.
POSSIBLE CAUSES
Not in setup remote mode; Faulty control valve section; Low pump
pressure; Bad pump; Switch failure; Faulty counterbalance valve.
Repair
problem.
Are mechanical problems present
at mast raising cylinders?
Yes No
Does ACC screen VALVES, bank 3 change by 4 (mast
raise) or bank 3 change by 8 (mast lower) when moving
mast switch from neutral to raise or lower?
Yes
No
Adjust cylinder counterbalance valve
(See Section 2 - Counterbalance
Valve Adjustments). Does cylinder
operate correctly?
Replace cylinder or consult
dealer/factory.
No
Is crane setup mode selected and confirmed?
Yes
No
Consult dealer/factory.
Select and confirm setup
remote mode.
Check for 24 volts at mast power switch, pin
number W46-F for raise or W46-H for lower.
Voltage No Voltage
Are solenoids magnetized when
switch position are enabled?
Yes
No
Replace switch.
Replace solenoid valve.
Check for 350 psi (24 bar) system
pressure with handle in neutral.
Pressure Ok
Pressure not Ok
Repair or replace
control valve.
Adjust accessory accumulator
system pressure to 500 psi (35 bar).
Does system pressurize to 3,000 psi (207 bar) when moving mast switch to raise position?
Yes
No
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