because the hydraulic system is under
pressure at all times.
a. General. For identification of the hydraulic lines
that connect to the various components of the hydraulic
system, refer to figure 1-5.
Loosen or remove the hydraulic hose boot
If more than one hose is to be removed,
tag the hoses so they can be reinstalled in the correct
Refer to figure 4-6 for identification and
removal of the hydraulic hoses and fittings.
Cleaning, Inspection and Repair.
dampened with cleaning solvent (Fed Spec P-D-680)
and dry thoroughly.
Inspect all fittings and hoses for damaged
Inspect the hoses for cracks, breaks or
Repair by replacement of defective parts.
Refer to figure 4-6 and install the hydraulic
Install the boot (30) and hose supports
and remove identification tags.
Refer to LO 5-3820-241-12 and service
the hydraulic system.
Operate the rock drill (para 2-5) and check
Hydraulic Pump Shut Off Valve
Refer to figure 3-4 and release the air
pressure from the hydraulic system.
Remove the hydraulic pump shut-off valve
as illustrated in figure 4-7.