TM 10-3950-206-12
precision formed steel tubing and synthetic rubber,
metal-reinforced hose. Fittings are high quality types,
designed to withstand the high pressure of the system.
Inspect all connections periodically for leakage. Tighten
connections, or replace components as required.
4-77. Hydraulic Reservoir Breather
a. Removal. Refer to figure 4-59, and remove
the breather/fill cap as instructed.
b. Cleaning and Inspection.
(1) Clean all parts with an approved cleaning
solvent and dry thoroughly.
(2) Inspect cap, filler neck, and strainer for
damage. Replace as required.
c. Installation. Using new gaskets install the
breather assembly in reverse of removal instructions.
Figure 4-58. Valve linkage adjustment points.
4-75. Oil Filter
The hydraulic system oil filter (fig. 4-5) is identical to the
transmission oil filter. Refer to paragraph 4-59 for
replacement instructions.
Note. The hydraulic reservoir must be drained
before disconnecting hoses or removing filter
Figure 4-59. Hydraulic reservoir breather, removal
assembly.
4-76. Hydraulic Lines and Fittings
All of the crane hydraulic circuitry is contained within
Section XIX. CABLE, HOOK BLOCK, AND BOOM MAINTENANCE
(2) Inspect the sheaves for cracked or dam-
4-78. Hook Block and Hoist Cable
aged edges, and excessive wear in grooves.
a. Removal.
(3) Inspect the hook block for cracks and
(1) Lower the hook block to the ground and
excessive play in sheave bearing. Inspect safety latch
run off adequate slack of the hoist cable.
for operation. Replace hook block as required.
(2) Remove cable clamp, pin, and cable-
(4) Inspect the hoist cable carefully for broken
wedge assembly from the boom head (fig. 4-60).
wires and/or excessive wear. If more than four broken
(3) Remove the wedge and unreeve the hoist
wires are found in one rope lay, or the wear on the
cable from the hook block and boom head.
individual wires exceeds one- third of their original
(4) Run off the remainder of the hoist cable
diameter, replace the hoist cable (refer to tab data, para
from the hoist cable drum, removing the drum anchor
wedge to release the hoist cable from drum.
c. Installation.
b. Cleaning and Inspection.
(1) Install the hoist cable and hook block in
(1) Clean all parts with an approved cleaning
reverse order of removal.
solvent. Dry thoroughly with compressed air.
4-60
