Table 4-2. Unit Preventive Maintenance Checks and Services
Hr - Hours
MO - Months
Item to Be
Change the lube oil and filter (paras 4-24 and 4-35). Refer to
Intake - 0.010 in. (0.254 mm)
Check the anti-freeze concentration. Add enough anti-freeze to
Drain the cooling system (para 4-66). Check for damaged hoses, and
loose or damaged hose clamps. Replace as required (para 4-62).
Check radiator for leaks, damage, and build-up of dirt. Clean and
repair as required (para 4-60). Flush the system until the water is
clean. Use a mixture of 50% water and 50% anti-freeze. System
capacity is 6 gal. (23 I).
Check the belt deflection at the longest span of belt. Maximum
deflection is 5/8 to 1/2 in. (9.5 - 12.7 mm). Replace belt if required
bearing, and fan
(4-68). Check the tensioner and fan hub bearings. Should spin freely
with no rough spots, wobble, or end play. Replace tensioner or fan
Check the index lines on the damper hub and the inertia member. If
the lines are more than 1/16 in. (1.59 mm) out of alignment, notify
direct support maintenance.
If NBC exposure is suspected, all air filter media should
be handled by personnel wearing protective equipment.
Consult your unit NBC Officer or NBC NCO for
appropriate handling or disposal procedures.
Check/inspect air cleaner element (para 3-8). Tighten or replace
parts as necessary to make sure air intake system does not leak (i.e.
cracked hoses, loose clamps, punctures, etc.).