Checking, Disassembling And Servicing; Checking And Adjusting; Compression Pressure - Kubota Z482-E2B Workshop Manual

SM-E2B SERIES, WSM

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.
NOTE
• 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 %.
Factory
spec.
Compression
pressure
Allowable
limit
[a] Nozzle Hole Adaptor Setting
S-13
DIESEL ENGINE
Z482-E2B
2.84 to 3.24 MPa
D662-E2B
29 to 33 kgf/cm
D722-E2B
412 to 469 psi
D782-E2B
3.53 to 4.02 MPa
Z602-E2B
36 to 41 kgf/cm
D902-E2B
512 to 583 psi
Z482-E2B
2.26 MPa
D662-E2B
2
23 kgf/cm
D722-E2B
327 psi
D782-E2B
2.55 MPa
Z602-E2B
2
26 kgf/cm
D902-E2B
370 psi
[b] Glow Plug Hole Adaptor Setting
KiSC issued 06, 2006 A
2
2
W10178940