Kubota M9540, Workshop Manual, Page: 137 / 619

1-S14
M8540, M9540, WSM ENGINE
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Engine Body
Compression Pressure
1. After warming up the engine, stop it and remove the air cleaner,
the muffler, high pressure pipes, cylinder head cover, overflow
pipe, all nozzle holders and all nozzle gaskets.
2. Install a compression tester (Code No: 07909-30207) and nozzle
adaptor for diesel engines to nozzle holder hole.
3. After making sure that the speed lever is set at the stop position
(Non-injection), run the engine at 200 to 300 min
−
1
(rpm) with the
starter.
4. Read the maximum pressure. Measure the pressure more than
twice.
NOTE
Q
• 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 %.
W1048776
Compression pressure
Factory spec.
3.47 MPa / 250 min
-1
(rpm)
35.4 kgf/cm
2
/ 250 min
-1
(rpm)
503 psi / 250 min
-1
(rpm)
Allowable limit
2.56 MPa / 250 min
-1
(rpm)
26.1 kgf/cm
2
/ 250 min
-1
(rpm)
371 psi / 250 min
-1
(rpm)
Tightening torque
Nozzle holder clamp nut
18 to 20 N·m
1.8 to 2.1 kgf·m
13 to 15 lbf·ft
Overflow pipe assembly
retaining screw
9.8 to 11.2 N·m
1.0 to 1.15 kgf·m
7.24 to 8.31 lbf·ft
Cylinder head cover screw
6.9 to 11.2 N·m
0.7 to 1.15 kgf·m
5.1 to 8.31 lbf·ft
Injection pipe retaining nut
23 to 36 N·m
2.3 to 3.7 kgf·m
17 to 26 lbf·ft
KiSC issued 09, 2008 A