TM 9-2330-390-14&P
4-270 Change 4
4-107. HYDRAULIC PUMP MAINTENANCE (Con't).
WARNING
•
DO NOT disconnect hydraulic lines and fittings while engine is running or
before hydraulic system pressure has been released. When engine Is running,
hydraulic system is under pressure. Dolly set must be fully lowered to the
ground and engine must be shut down before lines and fittings are discon-
nected. A line or fitting disconnected under pressure will explode with great
force 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 lines
and fittings. Tighten all connections before applying pressure. Keep hands and
body away from pinholes and nozzles which eject hydraulic fluid under high
pressure. Use a piece of cardboard or paper to search for leaks. If any hydraulic
fluid is injected into the skin, it MUST be surgically removed within a few hours
by 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 for
tagging instructions.
•
Hydraulic pump ports should be plugged with masking tape or other suitable
means as lines are disconnected or fittings are removed. Refer to paragraph
4-22 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 into
a suitable container.
2.
Disconnect hose assembly (15) from elbow (14) at outlet (bottom) of hydraulic pump (13). Drain hydraulic
fluid 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
