ENGINE
SM-E4B SERIES, WSM
1-S14
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Engine Body
Compression Pressure
1. Run the engine until it is warmed up.
2. Stop the engine.
3. [a] Nozzle Hole Adaptor Setting :
Remove the air cleaner, the muffler and all injection nozzles.
[b] Glow Plug Hole Adaptor Setting :
Remove the air cleaner, the muffler, the breather tube, the head
cover and all glow plugs.
4. [a] Nozzle Hole Adaptor Setting :
Set a compression tester (Code No. 07909-30208) with the
adaptor (Adaptor H, code No. 07909-31231) to the nozzle hole.
[b] Glow Plug Hole Adaptor Setting :
Set a compression tester (Code No. 07909-30208) with the
adaptor (Adaptor L, code No. 07909-31301) to the glow plug
hole.
5. After making sure that the stop lever is set at the stop position
(non-injection), run the engine with the starter and measure the
compression pressure.
6. Repeat steps 4 and 5 for each cylinder.
7. If the measurement is below the allowable limit, apply a small
amount of oil to the cylinder wall through the glow plug hole (or
nozzle hole) and measure the compression pressure again.
8. If the compression pressure is still less than the allowable limit,
check the top clearance, valve clearance and cylinder head.
9. If the compression pressure increases after applying oil, check
the cylinder wall and piston rings.
• Check the compression pressure with the specified valve
clearance.
• Always use a fully charged battery for performing this test.
• Variances in cylinder compression values should be under
10 %.
9Y1210785ENS0006US0
Compression
pressure
Z482-E4B
D722-E4B
D782-E4B
Factory
specifica-
tion
2.85 to 3.23 MPa
29.0 to 33.0 kgf/cm
2
413 to 469 psi
Allowable
limit
2.26 MPa
23.0 kgf/cm
2
327 psi
Z602-E4B
D902-E4B
Factory
specifica-
tion
3.53 to 4.02 MPa
36.0 to 41.0 kgf/cm
2
512 to 583 psi
Allowable
limit
2.55 MPa
26.0 kgf/cm
2
370 psi
[a] Nozzle Hole Adaptor Setting [b] Glow Plug Hole Adaptor Setting
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