TM 9-2330-390-14&P4-270 Change 44-107. HYDRAULIC PUMP MAINTENANCE (Con't).WARNING•DO NOT disconnect hydraulic lines and fittings while engine is running orbefore hydraulic system pressure has been released. When engine Is running,hydraulic system is under pressure. Dolly set must be fully lowered to theground and engine must be shut down before lines and fittings are discon-nected. A line or fitting disconnected under pressure will explode with greatforce and cause serious injury or death to personnel.•Escaping hydraulic fluid under pressure can penetrate the skin, causing seri-ous injury to personnel. Relieve pressure before disconnecting hydraulic linesand fittings. Tighten all connections before applying pressure. Keep hands andbody away from pinholes and nozzles which eject hydraulic fluid under highpressure. Use a piece of cardboard or paper to search for leaks. If any hydraulicfluid is injected into the skin, it MUST be surgically removed within a few hoursby a doctor familiar with this type of injury or gangrene may result.NOTE•Hydraulic lines should be tagged before removal. Refer to paragraph 4-18 fortagging instructions.•Hydraulic pump ports should be plugged with masking tape or other suitablemeans as lines are disconnected or fittings are removed. Refer to paragraph4-22 for instructions.•A suitable container should be used to catch any draining hydraulic fluid.Ensure that all spills are properly cleaned.1.Disconnect hose assembly (1) from elbow (2) at inlet (top) of hydraulic pump (13). Drain hydraulic fluid intoa suitable container.2.Disconnect hose assembly (15) from elbow (14) at outlet (bottom) of hydraulic pump (13). Drain hydraulicfluid into a suitable container.3.Remove clamp (3) and access cover (4) from adapter (5).4.Remove four capscrews (12), lockwashers (11), and adapter (5) with hydraulic pump (13) from engine (9).Discard lockwashers.5.Remove spider (6) from engine coupling half (7).6.If engine coupling half (7) is damaged, loosen setscrew (8) and remove engine coupling half from crank-shaft (10).7.Loosen setscrew (19) from hydraulic pump coupling half (18).a.REMOVAL
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