TM 9-4110-255-14
b. Testing.
(1) Remove cylinder head (16) per a. above.
(2) Invert cylinder head (16) and pour enough diesel fuel into cylinder head to pool around valve seats (22).
(3) Examine each port (23) for three minutes. If fuel accumulates in a port, replace the cylinder head (16).
Contact your local environmental officer for guidance on how to properly dispose of diesel fuel in
accordance with local regulation.
(4) If cylinder head (16) must be replaced, remove nozzle (24) (para 5-42).
(5) If no failure was indicated, install cylinder head (16) per c. below.
c. Installation.
(1) Clean carbon deposits from all mating surfaces. Check cylinder head (16) for any cracks or other damage
that would affect operation of the engine. If damaged, cylinder head must be replaced.
(2) Install nozzle (24) if removed (para 5-42).
(3) If nozzle (24) was removed, check the distance between nozzle tip and cylinder head face (25). The
distance must be between 0.069 in. and 0.089 in. (1.75 mm and 2.25 mm). If the distance is not within
this range, remove and install the nozzle (para 5-42) adding or removing washers as necessary between
nozzle and cylinder head (16).
(4) Install two new o-rings (20), protection pipes (19), new o-rings (18), and rods (21).
(5) Install new gasket (17).
(6) Install cylinder head (16) being careful to align it onto protection pipes (19).
(7) Install four flat washers (15), three nuts (13), and nut (14) as noted during removal. Torque nuts in
increments of 13 ft lb (18 Nm) each in the order shown until 53 ft lb (83 Nm) is reached.
(8) Install hook (9) and nut (8).
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