TM 5-3895-369-14
Table 4-2. Unit Preventive Maintenance Checks and Services
Hr - Hours
MO - Months
Item to Be
Interval
Item
Procedure
Inspected
Hr
No.
MO
ENGINE
Change the lube oil and filter (paras 4-24 and 4-35). Refer to
Engine
3
250
1
Chapter 3, Section I.
Change fuel filters (para 4-52). Bleed fuel system if
Fuel filters
500
6
2
required (para 4-54).
Adjust valve lash clearance (para 4-30):
Valves
12
1000
3
Intake - 0.010 in. (0.254 mm)
Exhaust - 0.020 in. (0.508 mm)
Check the anti-freeze concentration. Add enough anti-freeze to
Radiator
6
500
4
protect the engine to -24F (-31C) (para 3-7).
Drain the cooling system (para 4-66). Check for damaged hoses, and
Cooling system
5
12
1000
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
Drive belt,
1000
6
12
deflection is 5/8 to 1/2 in. (9.5 - 12.7 mm). Replace belt if required
tensioner
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
hub
hub if required (paras 4-69 and 4-67).
Check the index lines on the damper hub and the inertia member. If
Vibration
2000
7
24
the lines are more than 1/16 in. (1.59 mm) out of alignment, notify
damper
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
Air cleaner/
250
8
3
parts as necessary to make sure air intake system does not leak (i.e.
intake system
cracked hoses, loose clamps, punctures, etc.).
4-10
