TM 5-3895-369-14
Table 4-2. Unit Preventive Maintenance Checks and Services
MO - Months
Item
Interval
No.
MO
Hr
Item to Be
Inspected
Hr - Hours
Procedure
ENGINE
1
3
250
Engine
Change the lube oil and filter (paras 4-24 and 4-35). Refer to
crankcase
Chapter 3, Section I.
2
6
500
Fuel filters
Change fuel filters (para 4-52). Bleed fuel system if
required (para 4-54).
3
12
1000
Valves
Adjust valve lash clearance (para 4-30):
Intake - 0.010 in. (0.254 mm)
Exhaust - 0.020 in. (0.508 mm)
4
6
500
Radiator
Check the anti-freeze concentration. Add enough anti-freeze to
protect the engine to -24°F (-31°C) (para 3-7).
5
12
1000
Cooling system
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).
6
12
1000
Drive belt,
Check the belt deflection at the longest span of belt. Maximum
tensioner
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
hub
with no rough spots, wobble, or end play. Replace tensioner or fan
hub if required (paras 4-69 and 4-67).
7
24
2000
Vibration
Check the index lines on the damper hub and the inertia member. If
damper
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.
8
3
250
Air cleaner/
Check/inspect air cleaner element (para 3-8). Tighten or replace
intake system
parts as necessary to make sure air intake system does not leak (i.e.
cracked hoses, loose clamps, punctures, etc.).
4-10
