SERVICE MANUAL LUBRICATING OIL PUMP, OIL FILTERS & COOLER Section 8 10. If leakage Is found in areas "a" thru "c" of Step 9, the  pick-up  pipe  should  be  replaced  with  a  pre- tested assembly. 11. If  leakage  is  found  in  areas  "d"  or  "e",  remove the  assembly  and  investigate  the  cause.    (i.e. bad or missing gasket, manifold machine marks, flaws in the seal surface or flat face nut). NOTE:      If   the   manifold   sealing   surface   Is   found defective,    replace    the    complete    oil    pick-up    tube assembly. Clean the Oil Filter Components as follows: 1. Discard filter elements. 2. Disassemble  by-pass  valve,  plug  and  spring  in filter base. 3. Wash all parts in diesel fuel. 4. Dry all parts with compressed air. Inspect the 011 Filter Components as follows: 1. Visually  inspect  the  inlet  and  outlet  passages  in the filter base for restrictions. 2. Visually  inspect  the  by-pass  valve  for  wear  or damage.  Replace if necessary. 3. Check by-pass valve spring using a valve spring load testor.  Free length of 52.71 mm (2.075 in.) and a test length of 23.55 mm (0.927 in.) under 27.2   N•m   (6.12   Ibf-ft)   should   be   maintained. Replace if necessary. Clean the Oil Cooler as follows: 1. Immerse the cooler into a cleaning solvent such as  Stoddard  or  equivalent  to  loosen  any  sludge on foreign matter. NOTE:  DO NOT use caustic solution of any kind. INSTALLATION Assemble  and  Install  the  Lubricating  Oil  Pump  as follows: 1. Press  a  new  oil  seal  into  the  pump  housing. Refer to Section 7 for procedure. 2. Install  a  new  seal  washer  (2,  Fig.  7)  with  the larger  diameter  facing  out  (toward  pulley),  onto the crankshaft. NOTE:  New seal washer should also be Installed to engines not equipped. 3. Install the pump as follows: a. Install  a  new  "O"  ring  (3,  Fig.  6)  into  the groove  in  the  crankcase  front  cover;  then install the plate. b. Install  the  inner  and  outer  rotors  onto  the crankshaft. c. Using  the  new  "O"  ring  (4,  Fig.  4)  in  the groove in the housing (5), position the outer rotor   (6)   in   the   housing   and   install   the housing onto the crankcase front cover. d. Secure the housing to the cover. 4. Install   the   vibration   damper   as   described   in Section 7. NOTE: Inspect the wear sleeves on the damper hub for wear or damage.  Replace if necessary.  Refer to Section 7 for detailed information. Assemble  and  Install  the  Lubricating  Oil  Filters  as follows: 1. Install  the  valve  and  spring  into  the  bore  of  the filter base.  Install the plug and tighten to 50 lbs. torque. 2. Using  a  new  gasket,  install  the  filter  base  onto the    crankcase.        Secure    in    place    with    the hardware previously removed. 3. Connect  the  Turbocharger  oil-supply  line  to  the base (if equipped). CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 12