Kubota M108S, Workshop Manual

Page: 136 / 523

1-S13
M108S, WSM ENGINE
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING [V3800-CR-TI]
(1) Engine Body
Compression
1. After warming up the engine, stop it and remove the air cleaner,
the muffler, injection pipes, cylinder head covers, overflow pipe,
all injectors and all injectors gaskets.
2. Install a compression tester (2) (Code No: 07909-30208) and
injector adaptor (1) to injector hole.
3. Run the engine at 200 min
−
1
(rpm) with the starter.
4. Read the maximum compression. Measure the compression
more than twice.
NOTE
■
• Check the compression 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
Factory spec.
3.09 to 3.29 MPa / 200 min
-1
(rpm)
31.5 to 33.5 kgf/cm
2
/ 200 min
-1
(rpm)
449 to 477 psi / 200 min
-1
(rpm)
Allowable limit
2.41 MPa / 200 min
-1
(rpm)
24.6 kgf/cm
2
/ 200 min
-1
(rpm)
350 psi / 200 min
-1
(rpm)
Tightening torque
Injector clamp nut
24 to 27 N·m
2.4 to 2.8 kgf·m
18 to 20 lbf·ft
Overflow pipe joint screw
(M6 x 1.0)
9.81 to 11.2 N·m
1.00 to 1.15 kgf·m
7.24 to 8.31 lbf·ft
Cylinder head cover 1
screw
6.87 to 11.2 N·m
0.700 to 1.15 kgf·m
5.07 to 8.31 lbf·ft
Cylinder head cover 2
screw
9.81 to 11.2 N·m
1.00 to 1.15 kgf·m
7.24 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
(1) Injector Adaptor (2) Compression Tester
KiSC issued 06, 2007 A