Fig. L.9. Checking Rotor End Clearance.

Fig. L.6. Removing the "O" Sealing Ring from the Oil Pump

Fig. L.10. Removing the Oil Relief Valve Housing from the Cylinder Block.

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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LUBRICATING SYSTEM - L.5 Fig. L.8. Checking the Clearance between the Outer Rotor and Oil Pump Body. therefore if any parts require renewing a replacement assembly should be fitted. It may be worth mentioning at this point that low oil pressure may not even be due to the oil pump, reference to the page covering Fault Diagnosis under the heading "Low Oil Pressure" may help to isolate the cause. To Assemble the Oil Pump 1. Fit the drive and driven rotors to the pump body entering the chamfered end of the outer rotor to the body first. Refit end plate using a new "O" ring (where fitted). Secure the plate with the three screws. 2. Refit the key in the keyway of the drive shaft and refit the drive gear to the shaft. With earlier pumps, the boss on the drive gear was positioned towards the rear of the gear, the flat face of the gear being towards the circlip groove. The correct clearance for the gear was 0.003/0.007 in (0,08/0,18 mm) between the rear face of the gear and the pump body. With current pumps, the boss on the gear is positioned on the front of the gear and the correct clearance for the gear is 1.244/1.264 in (31.60/32,11 mm) when measured from the front face of the gear boss to the rear face of the pump mounting flange. Fig. L.9. Checking Rotor End Clearance. 3. Fit the drive gear retaining circlip (where fitted). To Refit the Oil Pump 1. Prime the oil pump with clean lubricating oil. 2. Fit the oil pump to No. 1 main bearing cap and secure with the t three setscrews. 3. Refit the idler gear to the shaft with the recessed face towards the front and secure with the circlip. Check the idler gear end float which should be within the tolerance of 0.002/0.016 in (0,05/0,41 mm). Check the idler gear backlash which should be within the limit of 0.00610.009 in (0,15/0,23 mm). 4. Using new joints refit timing case, timing gears, timing case front cover and crankshaft pulley as described in the appropriate section. 5. Refit the oil delivery pipe between the oil pump and pressure relief valve housing. 6. Refit the suction pipe to the oil pump using a new flange seal. 7. Fit the sump strainer to the pump suction pipe, and using new joints, refit the sump to the engine and secure with the retaining setscrews. Refill the sump with clean oil of an approved grade.

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