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305-350 ENGINE
6A6-17
NOTE: Mark gear teeth so they may be reassembled
with the same teeth indexing.
2. Remove the idler gear and the drive gear and shaft
from the pump body.
3. Remove the pressure regulator valve retaining pin,
pressure regulator valve and related parts.
4. If the pickup screen and pipe assembly need replacing,
mount the pump in a soft-jawed vise and extract pipe from
C AUTI 0 N : Do not disturb the pickup screen on
the pipe. This is serviced as an assembly.
1. She8 Extension
7. Pressure Regulator
2.
PurnpBody
Spring
3. D r i w Gear and Shaft
0. Rstaining Pin
4.
Idtrr (;ear
8. Screws
8. Pump
C w r
10. Pickup Screen
and
%, Prsrsure Regulator
Pip@
Vskue
3556
Fig. 6 ~ 6 - 3 7 - o i l Pump
Cleaning and lnspection
1. Wash all parts in cleaning solvent and dry with
compressed air.
2. Inspect the pump body and cover for cracks or
excessive wear.
3. Inspect pump gears for damage or excessive wear.
4. Check the drive gear shaft for looseness in the pump
body.
5. Inspect inside of pump cover for wear that would
permit oil to leak past the ends of the gears.
6. Inspect the pickup screen and pipe assembly for
damage to screen, pipe or relief grommet.
7. Check the pressure regulator valve for fit.
NOTE: The pump gears and body are not serviced
separately. If the pump gears or body are damaged or
worn, replacement of the entire oil pump assembly is
necessary.
Assembly
REFER T O FIGURE 6A6-37
1. If the pickup screen and pipe assembly was removed,
it should be replaced with a new part. Loss of press fit
condition could result in an air leak and loss of oil pressure.
Mount the pump in a soft-jawed vise, apply sealer to end of
pipe, and using Tool J 8369 (Fig. 6A6-38), tap the pipe in
place with a plastic hammer.
C AUTI 0 N: Be careful of twisting, shearing or
collapsing pipe while installing in pump.
Fig. 6A6-38 Installing Screen
2. Install the pressure regulator valve and related parts.
3. Install the drive gear and shaft in the pump body.
4. Install the idler gear in the pump body with the
smooth side of gear toward pump cover opening.
5. Install the pump cover and torque attaching screws
to specification.
6. Turn drive shaft by hand to check for smooth
operation.
Installation
1. Assemble pump and extension shaft to rear main
bearing cap, aligning slot on top end of extension shaft with
drive tang on lower end of distributor drive shaft.
2. Install pump to rear bearing cap bolt and torque to
specifications.
NOTE: Installed position of oil pump screen is with
bottom edge parallel to oil pan rails.
3. Install oil pan as previously outlined.
CONNECTING ROD BEARINGS
Connecting rod bearings are of the precision insert type
and do not utilize shims for adjustment. D O NOT FILE
RODS OR ROD CAPS. If clearances are found to be
excessive a new bearing will be required. Bearings are
available in standard size and .00lV and .002" undersize for
use with new and used standard size crankshafts, and in .010"
and .02OV undersize for use with reconditioned crankshafts.
lnspection and Replacement
1. With oil pan and oil pump removed, remove the
connecting rod cap and bearing.
2. Inspect the bearing for evidence of wear or damage.
(Bearings showing the above should not be installed.)
3. Wipe the bearings and crankpin clean of oil.
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