TM 9-6115-604-34NAVFAC P-8-633-34(2)Inspect and Repair. See Figure 6-11.WARNINGCompressed air used for cleaning or drying can create air borne particles that may enter theeyes. Pressure shall not exceed 30 ps (207 kla). Wearing of goggles Is required to avoid Injuryto 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. Removeslight nicks or burrs on the gasket surface using a flat mill file. Replace any cover that is cracked orwarped.(d)Inspect the fuel pump housing (66) for cracks, warping, or damaged gasket surfaces. Remove slight nicksor 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 wouldimpair proper functioning.(f)Check the high speed governor spring (12) for cracks and distortion, and measure the free length. Replacethe high speed governor spring if it is distorted, or if the free length does not measure 1.227 to 1.247inches (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 speedgovernor spring if the load requirements are incorrect.(h)Check the idling speed spring (17) for distortion, and measure the free length. Replace the idling speedspring 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 (24.26mm). The load required shall be 0.69 to 0.85 pound (0.31 to 0.39 kg). Replace the idling speed spring ifthe load requirements are incorrect.(0)Check the metering area of the idle adjust screw (13) and the idle and dip guide (15) for erosion andpitting. 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 thegovernor spring if It is distorted, or if the free length does not measure 1.308 to 1.328 inches (33.22 to33.73 mm).(m)Using a spring tester, check the load required to compress the governor spring (37) to 1.12 inches (28.45mm). The load required shall be 6.47 to 8.03 pounds (2.98 to 3.64 kg). Replace the governor spring if theload requirements are incorrect.(n)Check the idling spring (40) for distortion, and measure the free length. Replace the idling spring if it isdistorted, 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 loadrequirements 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. Ifthe sleeve in the housing is damaged or scored, replace the housing. If the throttle shaft is damaged orscored, replace it with a throttle shaft of the same color code and size class, Table 6-1.6-23
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