TM 10-3930-675-20-2
0164 00-1
RELIEVING HYDRAULIC SYSTEM PRESSURE
0164 00
THIS WORK PACKAGE COVERS
General, Relieving Hydraulic System Pressure
INITIAL SETUP
References
TM 10-3930-675-10
WARNING
DO NOT disconnect or remove any hydraulic system line or fitting unless hydraulic system pressure
has been relieved. Tighten all connections before applying pressure. Escaping hydraulic fluid under
pressure can penetrate the skin, causing serious injury.
Search for leaks with a piece of cardboard. Protect hands and body from high-pressure fluids. If an acci-
dent occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed
within a few hours or gangrene may result.
GENERAL
1.
During operation of the RTCH, hydraulic pressure is generated by hydraulic pumps to operate the following:
a.
Lifting boom
b.
Tophandler
c.
Service brakes
d.
Parking brakes
e.
Steering system
f.
Bogie wheel assembly hydraulic cylinders
g.
Cab movement hydraulic cylinders
2.
Both brake and steering systems have pressurized accumulators that provide adequate stored energy to operate in the
event of engine shutdown.
3.
In order to safely perform maintenance on all hydraulic systems, hydraulic pressure must first be relieved.
RELIEVING HYDRAULIC SYSTEM PRESSURE
1.
To relieve hydraulic pressure in ALL systems, perform the following:
a.
Lower and fully retract boom (TM 10-3930-675-10).
b.
Shut down engine (TM 10-3930-675-10).