Inspection - TM-9-2815-213-340044

TM 9-2815-213-34

e. Using dial indicator gage (calibrated in tenths of

3-60. Inspection

a thousandth inch) check concentricity of rotating roller.

a. Perform inspection in accordance with the

instructions contained in paragraph 26.

CAUTION

b. Check for scored, flaked, or chipped rollers on

Injector and valve tappet dimensions are

bearing sleeves. Discard damaged parts.

not alike. Use correct dimensions when

checking wear.

NOTE

If any of the above conditions exist,

Roller eccentricity of the injector tappet

camshaft should be inspected very

cannot exceed 0.005 inch, the valve

closely for damage.

tapped cannot exceed 0.001 inch. Move

indicator to a new location and recheck.

c. Measure tappet body outside diameter for wear.

Measure roller and bearing sleeves od and id for wear.

f. Using same indicator check squareness of roller

Discard if worn beyond limits contained in repair and

by sweeping indicator across diameter or end of roller,

rebuild standards paragraph 3-183.

then sweeping the other end. Rotate tappet roller 180

d. Check tappet sockets by "bluing" corresponding new

degrees and check again at roller ends by sweeping

push rod on ball end and rotating in tappet. A full seat

across the diameter. Roller squareness must not exceed

should be indicated.

0.001 inch in either injector or valve tappet assemblies. It

e. Check body pin holes and inspect hole for burrs

is recommended to extend some downward pressure

before reassembly.

against the roller when gaging to assure firm contact.

NOTE

3-61. Repair

Assemblies that do not pass the

inspections

above

must

No repair procedures beyond those

specified

disassembled,

(perform

inspection

paragraph 2-7 are authorized for tappets.

during disassembly to determine the

cause for rejection) reassembled, and

3-62. Assembly

reinspected.

a. Press new injector roller on bearing sleeve in tappet

until securely seated.

CAUTION

Lubricating oil passage in pin must be

alined for proper lubrication.

b. Insert 0.006 inch shim between side of roller or

sleeve and tappet fork. Press pin through body and roller

with lockwire in pin.

362. Testing

NOTE

Tests of either the injector or valve

tappet assemblies require a surface

plate, small V block with clamp (to hold

tappet in position), and dial indicator

calibrated in tenths of a thousandth inch

attached to a surface plate (fig. 3-24).

a. With a small wire, check indexing of pins and

Figure 3-24. Tappet assembly test.

body lubricating oil passages.

b. Check freeness of roller by rotating two or three

3-63. Installation

turns. If "drag" is felt, the plating on the pin has probably

a. Install new retainer spring on each tappet (31

picked up burrs during assembly or pin is not being held

and 35, fig. B-6).

securely during assembly.

b. Install tappets in tappet bores of block, refer to

c. Stand small V block on surface plate.

paragraph 2-ll.g. Injector tappets are larger

d. Stand tappet assembly on surfacing plate with

roller up. Secure tappet in V block with clamp.

3-15