Gehl 503Z, Operator'S Manual, Page: 36 / 132

Printed in U.S.A. 2-8 918070/FP0811
Use warning tag/control lockout procedures during
service.
Alert others that service or maintenance is being per-
formed and tag operator’s cab controls — and other
machine areas if required — with a warning notice.
Don’t run the engine if repairs or work is being per-
formed alone.
Do not run the engine if repairs or work is performed
alone. There should always be at least two people
working together if the engine must be run during ser-
vice.
Always use adequate equipment supports and
blocking.
Lower bucket to the ground before leaving the opera-
tor’s seat. Don’t work under any equipment supported
solely by a lift jack.
Track tension adjustments require caution.
NEVER
fully remove the track tension grease fitting.
To release pressure from the crawler frame track ten-
sion assembly, loosen the grease fitting only slightly–
no more than two turns.
Keep your face and body away from the fitting. Refer
to “Checking and Adjusting Track Tension” on
page 4-24.
Don’t work on hot engines, cooling or hydraulic sys-
tems.
Wait for the engine to cool after normal operation. Park
the excavator on a firm, level surface and lower all
equipment before shutting down and switching off con-
trols. When engine lube oil, gearbox lubricant or other
fluids require changing, wait for fluid temperatures to
decrease to a moderate level before removing drain
plugs.
Temperatures below 120°F (49°C) will reduce the
chances of scalding exposed skin while allowing the
fluid to drain quickly and completely. However, do not
let the fluid to fully cool, because drain time will be
substantially increased.
Cool-down is required prior to radiator or hydrau-
lic reservoir checks.
Stop the engine and allow it to cool before performing
service on the engine radiator or hydraulic reservoir.
Both assemblies have pressure vents at the filler cap for
venting pressure. LOOSEN CAPS SLOWLY. Vent the
pressure before removing the filler caps.
Release hydraulic system pressure by cycling con-
trols and releasing hydraulic reservoir pressure
before removing hydraulic reservoir access cover.
The hydraulic reservoir is pressurized. Vent the system
pressure by rotating the filler cap. LOOSEN CAP
SLOWLY prior to removal.
Make sure to release any hydraulic pressure stored in
the lines by cycling the operator’s controls in each
direction after the engine has been shut down.
Pressurized hydraulic oil leaks can be hazardous.
Fluid leaks from hydraulic hoses and pressurized com-
ponents can be difficult to see, but pressurized oil can
have enough force to pierce the skin and cause serious
injury.
Always use a piece of wood or cardboard to check for
suspected hydraulic leaks. Never use your hands.
Obtain immediate medical attention if pressurized oil
pierces the skin. Failure to obtain prompt medical
assistance could result in gangrene or other serious
damage to tissue.
Use correct replacement fasteners tightened to
proper torque.
Refer to the Parts Manual for information on torques
and assembly of components.
IMPORTANT
Always use the correct parts—incorrect
fastener connections can dangerously