TM 9-6115-604-34
NAVFAC P-8-633-34
(27)
Coat a new gasket (6) with sealing compound MIL-S451 80, and position the gasket over the guide studs
and dowels.
NOTE
Because of its size and weight, assistance will be needed to install the cover.
(28)
Align the cover (5) over the guide studs and dowels, and tap it into place using a soft hammer.
CAUTION
The hexagon head screw (1) and capscrews (2 and 3) securing the cover are of different
lengths. To avoid thread damage, be sure they are installed In the correct holes.
(29)
Using the lockwashers (4) and hexagonal nuts (60), install the screws (1, 2, and 3). Cross-tighten the
screws in three stages to 45 to 50 pound-feet (61 to 68 newton-meters).
(30)
Check the front cover-to-seal bore alignment as follows: (a) Mount a dial indicator on the face of the
crankshaft, and position the indicator button in the seal bore.
(b)
Rotate the engine one complete revolution, and check the runout of the seal bore. The TIR shall not
exceed 0.010 inch (0.25 mm).
(c)
If the TIR is excessive, remove the cover and dean the gasket surfaces thoroughly. Check the
gasket surfaces, and remove any nicks or burrs using a flat mill file.
(d)
Install the cover, and re-check the runout (31) Install new crankshaft and accessory drive seals in
accordance with paragraph 9-33.
(32)
Install the front engine support in accordance with paragraph 9-36.
(33)
Refer to paragraph 9-38, and install capscrews (18, Figure 9-68), lockwashers (7), and washers (8) which
secure the oil pan (20) to the timing gear cover.
(34)
Install the accessory drive pulleys in accordance with paragraph 9-33.
(35)
Install the idler pulley assembly in accordance with paragraph 7-6.
(36)
Install the accessory drive and fuel pump in accordance with paragraphs 6-18 and 6-27.
(37)
Install the water pump in accordance with the Operator and Organizational Maintenance Manual.
(38)
Install the radiator in accordance with the Operator and Organizational Maintenance Manual.
SECTION IV. MAINTENANCE OF PISTON AND CONNECTING ROD ASSEMBLIES, MAIN AND CONNECTING ROD
BEARINGS, AND CYLINDER LINERS
9-19. GENERAL. Before removing or disassembling functional engine components, be sure identifying match-marks
are placed on the parts for correct location at reassembly. During disassembly, a brief visual inspection of each part will
aid in locating the source of unusual wear. The reassembly area, tools, and parts must be kept dean; dirt grit, or other
foreign material will greatly shorten the life of bearings, pistons, rings, and cylinder sleeves. At reassembly, install all re-
usable parts in the same location from which they were removed. Pistons, piston pins, and connecting rods are held to
dose, individual weight tolerances. They may, however, be replaced individually without upsetting engine balance,
provided replacement parts have the same part number and letter Code.
9-20. PISTON AND CONNECTING ROD ASSEMBLIES MAINTENANCE.
a.
Inspect. (See Figure 924)
(1)
Remove the inspection covers in accordance with paragraph 9-37.
(2)
Rotate the engine as necessary, and visually inspect each connecting rod and piston for cracks or
evidence of overheating. A connecting rod or piston that has been running too hot will be dry, and will
have a varnish-like, baked-on coating of lubricating oil.
9-44
