Table 1. Unit Maintenance Preventive Maintenance Checks and Services (PMCS) for the D7G Tractor. - Continued

TM 5-2410-237-23

UNIT MAINTENANCE PREVENTIVE MAINTENANCE CHECKS AND

SERVICES (PMCS) - CONTINUED

0010 00

Table 1. Unit Maintenance Preventive Maintenance Checks and

Services (PMCS) for the D7G Tractor - Continued.

LOCATION

ITEM TO

ITEM

MAN-

CHECK/

NO.

INTERVAL

HOURS

SERVICE

PROCEDURE

24.1

Semiannual

Air Condi-

tioner (If

Equipped)

WARNING

Liquid refrigerant, when exposed to air,

quickly evaporates and will freeze skin or eye

tissue. Use care to prevent refrigerant from

touching your skin or eyes. Use protective

gloves and goggles. Serious injury or blind-

ness may result if you come in contact with

liquid refrigerant.

Refrigerant R-134a air conditioning systems

should not be pressure tested or leak tested

with compressed air. Combustible mixtures of

air and R-134a may form, resulting in fire or

explosion, which could cause injury or death

to personnel.

DO NOT work in an area where refrigerant

may contact an open flame or burning mate-

rial such as a cigarette. When refrigerant con-

tacts extreme heat, refrigerant breaks down

into poisonous phosgene gas which, if

breathed, causes severe respiratory irritation.

DO NOT breathe fumes from an open flame

leak detector.

NOTE

Refrigerant is odorless. As a result, all of it

may leak away and not be noticed until system

stops cooling. All vehicle refrigerant systems

lose some refrigerant depending on the condi-

tion of system. Higher loss rates signal a need

to locate and repair leaks.

Leaks are most often found at the compressor

hose connections and at various fittings and

joints in system. If unapproved replacement

hoses are installed, refrigerant can be lost

through hose permeation.

0010 00-10

Change 1