DETROIT DIESEL 53
Water Pump 5.1
Fig. 6. Fresh Water Pump Details and Relative Location of Parts
4. Place the pulley on the bed of an arbor press. Place a suitable rod between the ram of the press and the impeller end of the shaft,
then press the shaft into the pulley until the pulley is in its original position on the shaft.
Install the cover and a new gasket on the pump body. Tighten the cover bolts to 6-7 lb-ft torque.
Run the pump dry at 1200 rpm for a minimum of 30 seconds, or as required, to assure satisfactory seating of the seal.
Install Water Pump
Affix a new gasket to the flange of the water pump body.
Secure the water pump to the oil cooler housing with the five bolts and lock washers.
Install the hose between the water pump and water by-pass tube and tighten the hose clamps.
Install and tighten the belts.
NOTE: An idler pulley is used on some engines to adjust the water pump drive belt tension.
Close all of the drain cocks and refill the cooling system.
Start the engine and check for leaks.
FRESH WATER PUMP WITH CERAMIC INSERT IN IMPELLER
Effective with engine serial number 3D-64888, current water pump assemblies used on Series 53 engines include an impeller and
ceramic insert combination (Figs. 7 and 8). Disassembly and assembly of the current water pump is the same as the former water
pump except as follows:
When removing the impeller protect the ceramic insert from damage at all times during pump overhaul. Always lay the impeller on the
bench with the ceramic insert up to prevent damage to the insert.
Inspect the ceramic insert for cracks, scratches and bond to the impeller. If the insert is damaged, it may be replaced in the following
1. Bake the used ceramic insert and impeller assembly at 500°F. for one hour to remove the ceramic insert. The ceramic insert can
be removed easily from the counterbore while the adhesive is hot. Wire brush the impeller bond area to remove the old adhesive,
oxide, scale, etc.
Wipe the impeller bond area and the grooved side of the new ceramic insert with a cloth soaked in a