TM 5-4310-276-14
tension or broken helical coils.
C o m p r e s s o r Valves
(4) Inspect the cylinder head for defective
a. Removal.
valve seats.
(1) Remove air cleaner by turning counter-
(5) Inspect the valve shims for distortion or
clockwise.
imprints that will render the gaskets unserviceable.
(2) Remove cylinder head (6, fig. 7-1) by
loos -
(6) Repair after inspection.
ening tube nuts on intercooler (3) and tube elbow
(7) Valves and valve seats must be flat and
(1) on breather tube (2).
can sometimes be resurfaced by rubbing on fine
(3) Remove cylinder head screws (4 and 5) and
(No. 400) emery cloth held on a smooth flat surface.
lift off cylinder head (6) and gasket (7).
(8) Replace all defective parts that cannot be
repaired.
intake openings and valves are removed as follows:
c. Installation.
(a) Using valve
retainer wrench (10, fig. 7-
2) and by turning
counterclockwise, remove re-
careful not to catch valves between edges of seats
tainers (9), springs (8) and valves (7).
and retainers (valves must move freely in retainers
(b) Using wrench (4), and turning counter-
when assembled).
clockwise, remove seats (6). Remove shims (5).
(2) Valve openings A are L. P. intake
(5) Valve opening (B) is the L. P. discharge
openings and valves are installed as follows:
opening and valve is removed as follows:
(a) Place valve shims (5) in holes (A).
(a) Using wrench (4), and turning counter-
(b) Assemble valveseat (6) by turning clock-
clockwise, remove seat (6), valve (7) and spring (8).
wise with wrench (4) provided. Torque to 50 foot-
(b) Using wrench (19), and turning coun-
pounds.
terclockwise, remove retainer (9). Remove shim (5).
(c) Place valve (7) on seat (6).
(6) Valve opening (C) is the H. P. intake open-
(d) Assemble large end of spring (8) to in-
ing and valve is removed as follows:
side of retainer (9) and assemble by turning clock-
(a) Using wrench (17), and turning coun-
wise with valve retainer wrench (10).
terclockwise, remove retainer (16), spring (15) and
(3) Valve opening (B) is the L. P. discharge
valve (14).
opening and valve is installed in the following se-
(b) Using wrench (11), and turning coun-
quence:
terclockwise, remove seat (13). Remove shim (12).
(a) Place valve shim (5) in hole (B).
(7) Valve opening (D) is the H. P. discharge
(b) Assemble valve retainer (9) by turning
opening and valve is removed as follows:
clockwise with valve retainer wrench (10). Torque
(a) Using wrench (11), and turning coun-
to 50 foot-pounds.
terclockwise, remove seat (13), valve (14) and
(c) Assemble large end of spring (8) to in-
spring (15).
side of retainer (9).
(b) Using wrench (17), and turning coun-
(d) Place valve (7) on top of spring (8) and
terclockwise, remove retainer (16). Remove shim
assemble valve seat (6) by turning clockwise with
(12).
valve seat wrench (4).
b. Cleaning and Inspection.
(4) Valve opening (C) is the H. P. intake open-
ing and valve is installed as follows:
(a) Place shim (12) in hole (C).
(b) Assemble valve seat (13) by turning
Drycleaning solvent, P-D-680, used to
clockwise with wrench (11). Torque to 50 foot-
clean parts is potentially dangerous to
pounds.
personnel and property. Avoid re-
(c) Place valve (14) on seat (13).
peated and prolonged skin contact.
(d) Assemble large end of spring (15) to in-
Do not use near open flame or exces-
side of retainer (16) and assemble by turning clock-
sive heat. Flash point of solvent is
wise with wrench (17).
100F (38C).
(5) Valve opening (D) is the H. P. discharge
opening and valve is installed as follows:
(1) Clean all parts with cleaning solvent, item
(a) Place shim (12) in hole (D).
(b) Assemble valve retainer (16) by turn-
(2) Inspect all valve seats and valve discs for
ing clockwise with wrench (17). Torque to 50 foot-
cracks, breaks, rough or scored surfaces.
(3) Inspect the springs for distortion, weak
pounds.