PUMP GP-GEAR 5227803 - Caterpillar

(5) Thoroughly clean both sides of each 4N4178 Spacer Plate (1). Check the thickness of each spacer plate (1); the thickness must be .338" .001" (8.59 0.03). If the spacer plate thickness is correct, use a 31/32" diameter 8 or 10 fluted reamer at a speed of 110 rpm to increase four holes (A) to a diameter of .968" .010" (24.6 0.3). (6) Remove all burrs (rough, sharp edges) at locations (B) of each hole (A). Use a steel stamp to mark the part number 7N8358, a minimum of .19" (4.8) high, on the edge of each spacer plate at location (C), to let it be known that the reconditioning has been done and new seals and gaskets have been installed in the engine. (7) Check cylinder liner projection. See the Service Manual for procedure. Install the 7N9007 Gaskets (4) and 7N8358 Spacer plates (1) on the cylinder block. Install the gaskets and spacer plates dry.
The top of the cylinder block and both sides of each spacer plate (1) and gasket (4) must be clean and dry at installation.
(8) Install the 7N9006 Head Gaskets (5), clean and dry, on the spacer plates. Put a 7N623 Seal (6) in each of the holes (A) that were made larger in step 5. Install all other water seals and seals that are needed. Install cylinder heads (7) and all head bolts (8). Tighten the head bolts according to the torque and procedure given in the Service Manual. Install the 7N623 Seals clean and dry. Never use a 7N623 Seal a second time. If a cylinder head is removed for any reason, always install new 7N623 Seals at time of cylinder head installation.(9) Install the new radiator hoses, engine oil filter and all other parts that were removed. Put clean oil in the engine and fill the cooling system with the correct coolant.