Checking, Disassembling And Servicing; Checking And Adjusting; Engine Body - Kubota M8540 Workshop Manual

M8540, M9540, WSM

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
starter.
4. Read the maximum pressure. Measure the pressure more than
twice.
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
Nozzle holder clamp nut
Overflow pipe assembly
retaining screw
Tightening torque
Cylinder head cover screw
Injection pipe retaining nut
1-S14
ENGINE
−1
(rpm) with the
-1
3.47 MPa / 250 min (rpm)
2 -1
35.4 kgf/cm / 250 min (rpm)
-1
503 psi / 250 min (rpm)
-1
2.56 MPa / 250 min (rpm)
2 -1
26.1 kgf/cm / 250 min (rpm)
-1
371 psi / 250 min (rpm)
18 to 20 N·m
1.8 to 2.1 kgf·m
13 to 15 lbf·ft
9.8 to 11.2 N·m
1.0 to 1.15 kgf·m
7.24 to 8.31 lbf·ft
6.9 to 11.2 N·m
0.7 to 1.15 kgf·m
5.1 to 8.31 lbf·ft
23 to 36 N·m
2.3 to 3.7 kgf·m
17 to 26 lbf·ft
W1048776
KiSC issued 09, 2008 A