TM 9-6115-604-34
NAVFAC P-8-633-34
(2)
Inspect and Repair. See Figure 6-11.
WARNING
Compressed air used for cleaning or drying can create air borne particles that may enter the
eyes. Pressure shall not exceed 30 ps (207 kla). Wearing of goggles Is required to avoid Injury
to personnel.
(a)
Clean all parts in dean diesel fuel, regular grade DF2 W-F-800, and blow dry with compressed air.
(b)
Inspect all threaded parts for damage and stripped threads. Repair minor thread damage by chasing.
Repair stripped holes in accordance with paragraph 2-12. Replace stripped capscrews and fittings.
(c)
Inspect the covers (5, 23, and 43, Figure 6-11) for warping, cracks, or damaged gasket surfaces. Remove
slight nicks or burrs on the gasket surface using a flat mill file. Replace any cover that is cracked or
warped.
(d)
Inspect the fuel pump housing (66) for cracks, warping, or damaged gasket surfaces. Remove slight nicks
or burrs on the gasket surfaces with a flat mill file. Replace the housing if it is cracked or warped.
(e)
Check all retainers, shims, special washers, and spacers for cracks, warping, or other damage that would
impair proper functioning.
(f)
Check the high speed governor spring (12) for cracks and distortion, and measure the free length. Replace
the high speed governor spring if it is distorted, or if the free length does not measure 1.227 to 1.247
inches (31.17 to 31.67 mm).
(g)
Using a spring tester, check the load required to compress the high speed governor spring (12) to 1.00 inch
(25.4 mm). The load required shall be 12.75 to 13.81 pounds (5.78 to 6.26 kg). Replace the high speed
governor spring if the load requirements are incorrect.
(h)
Check the idling speed spring (17) for distortion, and measure the free length. Replace the idling speed
spring if it is distorted, or if the free length does not measure 1.015 to 1.035 inches (25.78 to 26.29 mm).
(i)
Using a spring tester, check the load required to compress the idling speed spring (17) to 0.955 inch (24.26
mm). The load required shall be 0.69 to 0.85 pound (0.31 to 0.39 kg). Replace the idling speed spring if
the load requirements are incorrect.
(0)
Check the metering area of the idle adjust screw (13) and the idle and dip guide (15) for erosion and
pitting. Replace a defective idle adjust screw or idle and dip guide.
(k)
Replace the idle spring plunger (18) if it is scored or grooved.
(I)
Check the governor spring (37) for cracks and distortion, and measure the free length. Replace the
governor spring if It is distorted, or if the free length does not measure 1.308 to 1.328 inches (33.22 to
33.73 mm).
(m)
Using a spring tester, check the load required to compress the governor spring (37) to 1.12 inches (28.45
mm). The load required shall be 6.47 to 8.03 pounds (2.98 to 3.64 kg). Replace the governor spring if the
load requirements are incorrect.
(n)
Check the idling spring (40) for distortion, and measure the free length. Replace the idling spring if it is
distorted, or if the free length does not measure 0.335 inch (8.50 mm).
(o)
Using a spring tester, check the load required to compress the idling spring (40) to 0.265 inches (6.70 mm).
The load required shall be 0.28 to 0.36 pounds (0.13 to 0.16 kg). Replace the idling spring if the load
requirements are incorrect.
(p)
Replace the throttle plunger (35) and idle spring plunger (41) if they are scored or grooved.
(q)
Check the bushings (31) in the cover (23). The bushing inside diameter must be 0.560 to 0.563 inch
(14.22 to 14.30 mm). Press the bushings out of the cover, and press in new bushings if necessary.
(r)
Check the throttle shaft (45) and its mating sleeve in the fuel pump housing (66) for scoring or grooving. If
the sleeve in the housing is damaged or scored, replace the housing. If the throttle shaft is damaged or
scored, replace it with a throttle shaft of the same color code and size class, Table 6-1.
6-23