Perkins Phaser Series - Page 290

COOLING SYSTEM 21
Data and dimensions
Note: This information is given as a guide for personnel engaged on engine overhauls. The dimensions
which are shown are those which are mainly used in the factory. The information applies to all engines,
unless an engine type code is shown.
Coolant pump
Four cylinder engines and early six cylinder engines
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal, gear driven
Outside diameter of shaft for drive gear . . . . . . . . . . . . . . . . . . . . 15,91/15,92 mm (0.6262/0.6257 in)
Diameter of bore of drive gear . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,86/15,88 mm (0.6244/0.6252 in)
Interference fit of drive gear on shaft . . . . . . . . . . . . . . . . . . . . . . . . 0,03/0,06 mm (0.0012/0.0024 in)
Diameter of bore of impeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,87/15,89 mm (0.6249/0.6257 in)
Outside diameter of shaft for impeller . . . . . . . . . . . . . . . . . . . . . . 15,91/15,92 mm (0.6264/0.6268 in)
Interference fit of impeller on shaft . . . . . . . . . . . . . . . . . . . . . . . . . . 0,02/0,05 mm (0.0007/0.0020 in)
Diameter of bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,99/30,00 mm (1.1807/1.1811 in)
Diameter of bore for bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,96/29,98 mm (1.1795/1.1803 in)
Interference fit of bearing in pump body . . . . . . . . . . . . . . . . . . . . . . 0,01/0,04 mm (0.0004/0.0016 in)
Dimension of impeller boss to front face
of pump body (fitted) early engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,1/8,5 mm (0.319./0.335 in)
Dimension of impeller boss to front face of pump body (fitted)
latest engines, impeller part number 3746X071 . . . . . . . . . . . . . . . . . . . . 7,1/7,5 mm (0.28./0.30 in)
Dimension of gear from rear face of pump body (fitted) . . . . . . . . . . . . . . . 0,6/2,6 mm (0.024/0.102 in)
Coolant pump
Six cylinder engines and later four cylinder engines
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal, gear driven
Outside diameter of shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,95/18,96 mm (0.7460/0.7465 in)
Diameter of bore of drive gear . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,90/18,92 mm (0.7441/0.7449 in)
Interference fit of drive gear on shaft . . . . . . . . . . . . . . . . . . . . . . . . 0,03/0,06 mm (0.0012/0.0024 in)
Diameter of bore of impeller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,87/15,89 mm (0.6249/0.6257 in)
Outside diameter of shaft for impeller . . . . . . . . . . . . . . . . . . . . . . 15,91/15,92 mm (0.6264/0.6268 in)
Interference fit of impeller on shaft . . . . . . . . . . . . . . . . . . . . . . . . . . 0,02/0,05 mm (0.0007/0.0020 in)
Diameter of bore for bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38,06/38,08 mm (1.4983/1.4993 in)
Diameter of bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38,09/38,10 mm (1.4995/1.5000 in)
Interference fit of bearing in pump body . . . . . . . . . . . . . . . . . . . . . . 0,01/0,04 mm (0.0004/0.0016 in)
Dimension of impeller boss to front face of pump body (fitted) . . . . . . . . . 7,7/8,0 mm (0.303./0.315 in)
Dimension of gear from rear flat face of pump body (fitted) . . . . . . . . . . 21,0/21,5 mm (0.827/0.846 in)
Dimension of gear from rear face of bearing (fitted) . . . . . . . . . . . . . . . . 0,47/1,53 mm (0.018/0.060 in)
Auxiliary coolant pump - fitted to certain intercooled engines
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal, belt driven
Outside diameter of shaft for pulley . . . . . . . . . . . . . . . . . . . . . 15,001/15,009 mm (0.5906/0.5909 in)
Inside diameter of bore of pulley . . . . . . . . . . . . . . . . . . . . . . . 14,935/14,956 mm (0.5879/0.5888 in)
Interference fit of pulley on shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,05/0,07 mm (0.0019/0.0028 in)
Diameter of bore of impeller . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,875/15,893 mm (0.625/0.6257 in)
Outside diameter of shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,9055/15,9182 mm (0.6263/0.6267 in)
Interference fit of impeller on shaft . . . . . . . . . . . . . . . . . . . . . . . . . . 0,01/0,04 mm (0.0004/0.0016 in)
Impeller to body clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,64/0,89 mm (0.025/0.035 in)
Perkins Phaser/1000 Series, April 1995 21A.29