Section IV. HYDRAULIC SYSTEM MAINTENANCE
DRAINING AND FLUSHING HYDRAULIC SYSTEM
SUPPLIES: Diesel fuel (82 gal (310 L) Required)
Oil, lubricating, MIL-L-2104 Grade 10 (240 gal (934 L) required)
DRAINING AND FLUSHING:
If a component has been changed
because of a failure that might allow
metal or abrasive particles to enter
the system, all systems must be
thoroughly checked, drained and
1. DRAIN HYDRAULIC RESERVOIR.
a. Remove reservoir drain plug (1). Allow
approximately three minutes after oil stops
flowing from drain port, for side walls to drain.
The hydraulic reservoir capacity is
165 gallons (624.5 L)
b. Clean and install reservoir drain plug and fill
reservoir with a 50-50 mixture of diesel fuel and
clean hydraulic oil MIL-L-2104, grade 10.
Cycle crane through all functions several times;
then return crane to its stowed position and turn
d. Remove reservoir drain plug (1) and drain
front and rear wheels to extreme left. Shut down
reservoir. Clean and install drain plug (1) and fill
engine. (Refer to TM 53810-306-10.)
reservoir with clean oil, MIL-L2104, grade 10.
2. FLUSH HYDRAULIC SYSTEM.
Oil supply lines must be connected to
the cylinders when flushing the