PIPE 8V4078 - Caterpillar

Bend the edges of lockwasher (20) against the flats of locknut (21).
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Lubricate port plate (15) with a solution of water and five percent soap. Install port plate (15) and ring (14) into body (13). Make sure that the lug on the port plate fits into the slot in the body.
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Make sure that O-ring seal (16) is in good condition. Coat the O-ring seal with a solution of water and five percent soap in order to make installation easier. Install the O-ring seal onto body (13).
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Install body (13). Install washers and bolts (12) in body (13). Tighten the bolts to a torque of 22 4 N m (16 3 lb ft).
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Determine the thickness of the shims for the impeller. The shims will be used in order to obtain a clearance of 0.10 to 0.15 mm (0.004 to 0.006 inch) on each side of the impeller.Place a straight edge on the face of the port plate (15) across the opening for shaft (19). Use a feeler gauge to measure Dimension (X) between the shoulder of the shaft and the face of the port plate.The correct thickness of the shims is Dimension (X) plus the specification of the clearance. Table 2 is an example of the calculation.
Table 2
Example of the Calculation for Determining the Thickness of the Shims
Dimension (X) Clearance Specification Thickness of the Shims
0.56 mm
(0.022 inch) + 0.125 mm
(0.005 inch) = 0.685 mm
(0.0270 inch) In the example, the proper thickness for the shims is 0.685 mm (0.0269 inch).
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Install shim (18) and key (17) onto shaft (19).
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Fit the keyway of impeller (11) onto the key of shaft (19). Install the impeller onto the shaft. If you use a suitable press in order to install the impeller, be sure to support the shaft with a jack and/or blocks.
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Thoroughly clean the threads of the shaft and nut (10) with solvent. Coat the threads of the shaft with Tooling (Q). Install the washer and nut (10) onto the shaft. Tighten the nut to a torque of 70 5 N m (52 4 lb ft).
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Lubricate port plate (9) with a solution of water and five percent soap. Install port plate (9). Note the position of the lug on the port plate.
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Ensure that O-ring seal (8) is in good condition. Install the O-ring seal onto cover (7). Install the cover. Fit the slot of the cover over the lug on the port plate.
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Thoroughly clean the threads of bolts (6) with solvent. Coat the threads of bolts (6) with Tooling (Q). Install the bolts in cover (7). Tighten the bolts to a torque of 5 1 N m (4 1 lb ft). End By:
Install the auxiliary water pump. Refer to Disassembly and Assembly, "Auxiliary Water Pump - Install".