TM 5-3805-261-23-1
GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0020 00
WORK SAFETY - CONTINUED
00020 00
5.
Before beginning a procedure, ensure that the following conditions have been observed, unless otherwise specified:
a.
Machine must be parked on level ground with parking/emergency brake applied.
b.
All machine implements must be lowered to the ground.
c.
Transmission must be in N (Neutral) and locked.
d.
Engine must be off.
e.
Components which are hot at operating temperatures (i.e., cooling, exhaust, and hydraulic systems) must cool
down before they are removed.
f.
Components must, however, be at operating temperature to be tested.
g.
Battery disconnect switch must be in OFF position and/or batteries disconnected when performing electrical sys-
tem maintenance.
h.
Hydraulic system pressure must be relieved before disconnecting any hydraulic system line or fitting. Refer to
Relieving Hydraulic System Pressure in this work package.
RELIEVING HYDRAULIC SYSTEM PRESSURE
00020 00
WARNING
Do NOT disconnect or remove any hydraulic system line or fitting unless engine is shut down and
hydraulic system pressure has been relieved. Tighten all connections before applying pressure. Escap-
ing hydraulic fluid under pressure can penetrate the skin, causing injury to personnel.
At operating temperature hydraulic oil is hot. Allow hydraulic oil to cool before disconnecting any
hydraulics. Failure to do so could result in injury.
1.
Lower all machine implements to the ground.
2.
Shut down engine.
3.
Move all control levers through all operating positions. Return levers to HOLD position.
4.
Slowly loosen hydraulic tank filler cap and allow any pressure to escape.
GENERAL INFORMATION
00020 00
1.
Before beginning a task, find out how much repair, modification, or replacement is needed to fix the equipment as
described in this manual. Sometimes the reason for equipment failure can be seen right away and complete teardown is
not necessary. Disassemble the equipment only as far as necessary to repair or replace damaged or broken parts.
2.
All tags and forms attached to the equipment must be checked to learn the reason for removal from service. Check all
Modification Work Orders (MWOs) and Technical Bulletins (TBs) for equipment changes and updates.
3.
In some cases a part may be damaged by removal. If the part appears to be good, and other parts behind it are not defec-
tive, leave it on and continue the procedure. Here are a few simple rules:
a.
Do not remove dowel pins or studs unless loose, bent, broken, or otherwise damaged.
b.
Do not pull bearings or bushings unless damaged. If you must get at parts behind them, pull out bearings or bush-
ings carefully.
c.
Replace all gaskets, seals, preformed packings, O-rings, cotter pins, spring pins, self-locking nuts, and lockwash-
ers.
0020 00-2
