Personal injury can result from hydraulic oil pressure and
Hydraulic oil pressure can remain in the hydraulic system
after the engine has been stopped. Serious injury can be
caused if this pressure is not released before any service
is done on the hydraulic system.
Make sure all of the attachments have been lowered, oil is
cool before removing any components or lines. Remove
the oil filler cap only when the engine is stopped, and the
filler cap is cool enough to touch with your bare hand.
Car must be taken to ensure that fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component containing
Refer to Special Publication, NENG2500, "Caterpillar Tools
and Shop Products Guide", for tools and supplies suitable
to collect and contain fluids on Caterpillar products.
Dispose of all fluids according to local regulations and
(1) Hose. (2) Cylinder rod end port. (3) Cylinder.
Start the engine. Push the blade control lever forward in
order to lower the blade completely. Shut off the
Disconnect hose (1) from cylinder rod end port (2) of
Install a plug into the end of hose (1).
Position a 5 L (1 US gal) graduated container under port
(2). Start the machine and run the engine at 2350 RPM.
Push the blade control lever forward to the LOWER
position. There is excessive internal leakage if the oil
leakage from port (2) is in excess of .5 L/min (0.13 US
gpm). In this case, the blade cylinder should be
repaired or replaced.
Shut off the engine. Remove the plug from the end of
hose (1), and connect the hose to port (2).