Models - Honda CB350 Repair Manual

96 LUBRICATION SYSTEM
lubrication. However, if this is done,
be sure to install new crankcase cover
gaskets, as they were also modified.
The new pump can be identified by the
alloy pump body and steel piston. The
early pump body was a steel casting
with an alloy piston. Note that if this
modification is made the entire pump
assembly must be changed.
1. Inspect the bore in the oil pump. If
it is scored, the pump housing and piston
should be replaced.
2. Check the condition of the pump
piston. Ifit is scored, it should be re—
placed.
Check the pump piston for scoring (350)
3. CB/CL350,KI,K2/SL350: If a mi—
crometer is available, measure the diam—
eter of the pump piston. If found to be
less than 15.930 mm (0.627 in.), the pis—
ton should be replaced.
4. CB/CL350,KL,K2/SL350: With an
inside micrometer, measure the pump
bore if found to be larger than 16.1 mm
(0.634 in.), the pump housing and piston
should be replaced.
5. Remove the suction valve bolt from
the top of the pump (iffitted), and the
steel ball beneath it. If the ball shows
signs of wear, the pump should be re—
placed.
6. Remove the filter screen from the
bottom of the pump and wash in clean
solvent. Inspect the screen for any punc—
ture marks. If the sereen mesh is broken
to any extent, the screen must be re—
placed.
7. Check the oil pump gasket for con—
dition. If defective in any way, it must be
replaced. It is recommended that this
gasket be replaced regardless ofapparent
condition.
8. Inspect the condition of the mount—
ing bolt lockplate and replace it if the
tabs are fatigued.
360 MODELS
Removal and Installation
1. Remove the right crankcase cover.
Refer to Chapter 4 if necessary.
2. Remove the idler gear and shaft.
3. Remove the three mounting bolts
from the oil filter screen, and remove the
screen. Remove the two remaining
mounting bolts from the oil pump and
remove the pump.
4. Install the oil pump and filter in the
reverse order of removal, however, note
that the two O—rings behind the pump
must be in good condition. If in doubt as
to their condition, replace them with new
ones.
Disassembly
To disassemble the pump, remove the
three phillips head screws from the rear of
the pump and pull the pump halves
apart.
NOTE: It is not recommended that the
pump be disassembled. If the pump is
suspected of being defective, it should
be replaced as a unit rather than mak—
ing an effort to repair it.
—(2)
Disassemble the purtnp (1) by removing the three
screws (2) (360)
Inspection
1. Inspect the condition of the oil
pump drive gear and idler gear. If any
teeth are chipped, broken, or missing,
replace the gears and inspect the primary
gear for the same damage.
2. Measure the clearance between the