164
50940193/DP0415
Sluggish hydraulic
system performance
Low hydraulic fluid level.
Top off hydraulic fluid.
Hydraulic oil viscosity too
heavy.
Replace existing oil with proper viscosity oil.
See “Fluid Capacities/Lubricants” on page 183.
Allow longer warm-up.
Engine to pump coupling or
hydraulic pump damaged.
Contact dealer.
Pressure limiting valves set too
low or damaged.
Hydraulic cylinder damaged.
Control valves damaged.
Oil leaking past cylinder/motor
seals (internal or external).
Oil leaking past spools in
control valve.
Low engine speed.
Increase engine speed.
Engine running rough.
Poor fuel quality or incorrect grade. See “Fluid
Capacities/Lubricants” on page 183 for proper
fuel grade.
Restricted fuel filter/fuel system. Replace fuel
filter; remove restriction. See “Changing Fuel
Filter” on page 138.
Dirty/restricted air filter(s).
Replace filter(s).
Air in hydraulic system.
Cycle lift and tilt cylinders to maximum stroke
and maintain pressure for short time to clear air
from the hydraulic system. Also check for low
oil level in reservoir; top off as necessary.
Worn hydraulic pump.
Contact dealer.
Control linkage malfunction.
Adjust/repair linkage for full spool travel.
Solenoid valve malfunction.
Check solenoid electrical connections; repair
as necessary.
Hydraulic system
overheating
Hydraulic oil cooler restricted.
Clean hydraulic oil cooler. See “Cleaning
Radiator Fins” on page 141.
Low hydraulic oil level.
Top off hydraulic oil. See “Checking Hydraulic
Oil Level” on page 143. See “Fluid Capacities/
Lubricants” on page 183 for proper oil grade.
Hydraulic system overloaded.
Reduce load.
Table 26: Hydraulic System Troubleshooting
Problem
Possible Cause
Corrective Action
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