Owner`s manual

FIGURE 3
DIESEL VALVE ADJUSTMENT
"Valve clearance
M-12-M2-12, 15-18 ................ 006 - .0(]7
M-25XP-35, M3-20, M4-30 (0.145 - 0.185 mm)
""Valve Clearance
M-20-30-40-50 . . . . . . . . . . . . . . . . .. .0(]7 - .009
(.0.18 - 0.22 mm)
(with engine
cOld.)
Intake valve opens.............. 20
0
B TDC
Intake valve closes .............. 45
0
A BDC
ADJUSTMENT
OF VALVE CLEARANCE
Exhaust
valve opens. . . . . . . . . . . .. 50
0
B BDC
Exhaust
valve closes............ 15
0
A TDC
.. Models 12, M2-12, 15, 18,
25, 25Xp, 35, M3-20, M4-30
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MODEL 12
""Models 20, 30, 40 & 50
.
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MODELS 15-18-25 MODELS 20-30-40-50
25XP 35
TIMING MARK LOCATIONS
(INJECTOR
PUMP SIDE)
FIGURE
4
Turn crankshaft over by hand (Clockwise) being careful not to damage the spline on the end of the
shaft.
Turn until pointer aligns with timing mark 1TC on flywheel (Figure 4A). Check to make sure both
intake and exhaust valves on
No.1 cylinder are loose. If not, turn crankshaft one more complete revolu-
tion to bring
No. 1 cylinder onto compression. Valves can now be set on No. 1 cylinder.. This procedure
is true for
No. 1 cylinder on all models. To set the valves on the remaining cylinders, follow the mat-
ching diagrams above being sure that both intake and exhaust valves are loose at the corresponding
cylinder before adjusting.
CAUTION: DO NOT use the timing marks 1-FI, 2-FI, etc. These marks are used for timing fuel injector
pumps only.
ADJUSTING FUEL TIMING
Steps necessary for fuel timing:
1. Remove air intake manifold so that the fuel injector pump can be removed without interference.
2. Set throttle lever at full speed.
3. Remove injector pump side cover. This will enable you to visually check to insure that the fuel rack
pin jnside the pump properly
aligns with the opening in the top of pump housing when being
removed to prevent binding or shearing of the pin. This pin is critical to proper pump operation
and
if damaged will require replacement of the complete pump.
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