Snorkel XT24AL-sn10000+ - Manual (Page 48)

1/31/2008 - 49 -
Hydraulic Tank Cap Venting System
A free-breathing hydraulic tank cap is essential for good machine performance and service
life. A dirty or clogged cap may cause the machine to perform poorly. Extremely dirty conditions
may require that the cap be inspected more often.
1. Remove the breather cap from the hydraulic tank
2. Check for proper venting.
RESULT: If the air does not pass through the cap, clean or replace the cap.
NOTICE: When checking for positive tank cap venting, air should pass
freely through the cap.
Using a mild solvent, carefully wash the cap venting system. Dry the system using low-
pressure compressed air. Repeat vent check.
Install the breather cap onto the hydraulic tank. The hydraulic tank is a vent-type tank.
The breather cap has an internal air filter that can become clogged or over time, can deteriorate.
If the breather cap is faulty or improperly installed, impurities can enter the hydraulic system,
which may cause component damage. Extremely dirty conditions may require that the cap be
inspected more often.
1. Remove and discard the hydraulic tank breather cap
2. Install a new cap onto the tank.
Bleeding air from the hydraulic system- System “lock”
It may be necessary to “bleed” (or relieve) air from the hydraulic system after service has
been performed. If the system is not free of air, the safety system will activate and the “velocity
fuse” in the manifold will “lock” the machine. This lock can be over-ridden by pulling the manual
release at the same time as you raise the machine.
Please follow the following procedure:
1. Locate the hydraulic return line (located at the top of pump).
2. Remove the line and place this line in a container.
3. Pull the manual release (the emergency lowering valve located at the back of machine)
and have an assistant raise machine at the same time until oil comes out of the hose.
This usually takes about two seconds, be careful as air and oil will exit the system with
some velocity.
4. Release manual release and raise lift. It will be necessary to add oil to the system when
the lift platform reaches ten feet of elevation.
5. Extend the platform until it hits the cylinder stop (twenty-four feet) and reconnect the
hydraulic return line. 6. Lower unit and cycle system.