BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT - continued

TM 10-3930-673-20-1

WARNING

Hydraulic oil in the system can be under pressures over 3000 psi With engine OFF. Always relieve pressure in hydraulic lines

before attempting to remove any component in the hydraulic system. With engine OFF, starter switch in RUN position, and MLRS

attachment on the ground, move control levers through all operating positions several times to relieve live pressure. Relieve

pressure in hydraulic oil tank by loosening filler cap very slowly. Failure to follow these precautions could result in serious

personal injury.

At operating temperatures, hydraulic oil is hot and under pressure. Hot oil is hot and under pressure. Hot oil can cause injuries.

Allow hydraulic oil to cool before disconnecting any hydraulic lines.

CAUTION

Wipe the area clean around all hydraulic connections to be opened during removal and disassembly. Cap oil lines and plug holes

after removing lines. Contamination of the hydraulic system could result in premature failure.

HYDRAULIC OIL LEVEL

VISUAL INSPECTION

(1) Visually inspect hydraulic oil level gage

to determine if tank is filled to proper

level (Para 18-2).

(2) Hydraulic oil should be visible between

ADD and FULL marks.

(a) If hydraulic oil is visible between

ADD and FULL marks, go to

Step 2 of this fault.

(b) If hydraulic oil is not visible, inspect

tank for leaks. Then fill tank to

FULL mark with hydraulic oil

(Para 18-2).

HYDRAULIC

IL LEVEL GAGE

HYDRAULIC OIL TANK

TR01261

2-815