John Deere 318 User Manual

Page 281

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CRANKCASE
VACUUM TEST

Remove dipstick.

Put plug (A) in dipstick hole.

IMPORTANT: Do not hook up rest
of Test Kit until engine is running
or fluid in Manometer will be
sucked into crankcase during
cranking mode.

Start engine and run at fast idle.

Make test connections from JT05697 U-Tube
Manometer Kit.

Record crankcase vacuum reading.

SPECIFICATIONS

Minimum Crankcase Vacuum:
B43E (Early 316),
B43G (Early 318) and
B48G (Early 420) . . . . . . . . . . . 25 cm (10 in.) water
P218G (Later 316 and 318) and
P220G (Later 420) . . . . . . . . . . 33 cm (13 in.) water

Remove Manometer line from plug before
shutting off engine.

M49221 -UN-20DEC89

A—AHT8741-F66 Plug
B—JT05703 Double Barb
Fitting
C—JT05699 Clear Line
D—JT05698 U-Tube
Manometer

1!

TIMING
ADJUSTMENT
(B43E, B43G and
B48G)

M37092 -UN-29AUG88

M37095 -UN-28APR95

Remove air cleaner base (A) and ignition point
cover (B).

Rotate crankshaft clockwise (facing flywheel) until
points are completely open.

Turn adjusting screw (C) until ignition points are
at widest gap.

Inspect ignition points for oxidation; stuck, burnt,
or pitted condition.

Check point gap using a feeler gauge. Gap must
according to specifications. If necessary, turn
adjusting screw (C) until gap is correct.

SPECIFICATIONS

B43E and B43G . . . . . . . . . . . . 0.41 mm (0.016 in.)
B48G
Spec A and B . . . . . . . . . . . . 0.51 mm (0.020 in.)
Spec C . . . . . . . . . . . . . . . . 0.41 mm (0.016 in.)

MX,159022010,24-19-28APR95

MX,159022010,25-19-16MAY95

Diagnosis, Tests and Adjustments/Timing Adjustment (B43E, B43G and B48G)

TM1590 (17MAY95)

220-10-11

316, 318 & 420 Lawn and Garden Tractors

020895

220

10

11

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This manual is related to the following products:

316, 420