Landoll 345E, Operator'S Manual

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TROUBLESHOOTING
5-7
Dock Level Hydraulics
Hydraulic Power Supply Engine
Package
To troubleshoot the engine in the hydraulic engine
package, please refer to the owners manual that was
provided with the engine package.
OVER HEATING OF OIL IN SYSTEM Oil passing through relief valve for
excessive time Return control valve to neutral when not in
use
Incorrect, low, dirty oil Use recommended oil (See Table 4-1). Fill
reservoir with clean oil. Replace filter.
Engine running too fast Reduce engine speed
Excessive component internal leakage Repair or replace component as
necessary.
Restriction in filters or lines Clean and/or replace filter or lines.
Insufficient heat radiation Clean dirt and mud from
reservoir and components.
Malfunctioning component Repair or replace
Excess oil going to dock level circuit Adjust flow divider for 2.5 to 3.1 GPM flow.
FOAMING OF OIL Incorrect, low, dirty oil Replace, clean, or add oil as needed
Air leaks Check suction line and component seals
for suction leaks. Replace defective
parts.
NOISY PUMP Low, incorrect, foamy oil Replace, clean, or add oil as needed
Suction line plugged Clean out obstruction or replace line.
Flush system, replace filter
LEAKY PUMP Damaged or worn shaft seal Replace seal and check for misalignment
Loose or broken parts Tighten or replace
CYLINDERS MOVE WITH CONTROL
VALVE IN NEUTRAL POSITION Leaking cylinder seals or fittings Replace worn seals or fittings
Control valve not centering when released Check linkage for binding and repair
Valve damaged Repair or replace
CONTROL VALVE LEAKS Seals damaged worn Replace
CYLINDER LEAKS Seals worn or damaged Replace
Rod damaged Replace
Barrel damaged Replace
CYLINDERS DO NOT FUNCTION OR
CREEP WITH PTO DISENGAGED Leaking fittings or cylinder seals Tighten loose fittings. Replace worn seals
or fittings
Piloted check valve or o-ring leak Replace defective component
PROBLEM PROBABLE CAUSE SOLUTION
PROBLEM PROBABLE CAUSE SOLUTION
FAILS TO LIFT TRAILER Insufficient hydraulic supply pressure Adjust relief valve for 2400 - 2500 psi
Worn hydraulic pump Service or replace
Insufficient volume to dock level circuit Adjust flow divider to provide 2.5 to 3.1
GPM
Too heavy a load Reduce load on cylinders
LOWERS UNEVENLY OR ERRATICALLY Insufficient volume to dock level circuit Clean system and new oil and filter
Dirty oil in check valves Use same procedure as above