GENERAL MAINTENANCE INSTRUCTIONS
These general maintenance instructions contain general shop practices and specific methods you must be familiar with
to properly maintain the RT 240 RTCH. You should read and understand these practices and methods before performing
any Organizational Maintenance procedures.
Before beginning a task, find out how much repair, modification or replacement is needed to fix the equipment. Some-
times the reason for equipment failure can be seen right away and complete teardown is not necessary. Disassemble
equipment only as far as necessary to repair or replace damaged parts.
In some cases, a part may be damaged during removal. If the part appears to be good, and other parts behind it are not
defective, leave it in place and continue with the procedure. Here are a few simple rules:
Do not remove dowel pins or studs unless loose, bent, broken or otherwise damaged.
Do not remove bearings or bushings unless damaged. If you need to remove them to access parts behind, carefully
pull out bearings and bushings.
Replace all gaskets, lockwashers, locknuts, seals, cotter pins, and o-rings.
All tags and forms attached to the equipment must be checked to learn the reason for removal of equipment from ser-
vice. Modification Work Orders (MWOs) and Technical Bulletins (TBs) must also be checked for equipment changes
Before beginning a procedure, think about the safety risks and hazards to yourself and to others. Wear protective gear
such as safety goggles or lenses, safety shoes, rubber apron or gloves.
Before beginning a procedure, ensure that the following conditions have been observed, unless otherwise specified:
Vehicle must be parked on level ground with parking brake applied or wheels chocked.
Transmission must be in N (Neutral).
Engine must be off.
Master battery switch must be in OFF position.
Components must be at operating temperature to be tested.
Components which are hot at operating temperatures (i.e., cooling, exhaust, and hydraulic systems) must cool
down before they are removed.
DO NOT disconnect or remove any hydraulic system line or fitting unless hydraulic system pressure
has been relieved. Tighten all connections before applying pressure. Escaping hydraulic fluid under
pressure can penetrate the skin, causing serious injury.
Search for leaks with a piece of cardboard. Protect hands and body from high-pressure fluids. If an acci-
dent occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed
within a few hours or gangrene may result.
DO NOT disconnect any hydraulic line or fitting without first relieving pressure in hydraulic lines. Follow instructions
in WP 0164 00 to safely relieve pressure.
Immediately clean up spilled fluids to avoid slipping.
When lifting heavy parts, have someone help you. Ensure that lifting equipment or jack is working properly, that it
meets weight requirement of part being lifted, and that it is securely fastened to part.