1997 ISUZU TFS SERIES clutch

7C-2 CLUTCH
MAIN DATA AND SPECIFICATIONS
ENGINEHEC Engine
Series with
MSG4JA1HEC Engine
Series with
MUA4JB1T 4JG2T 6VD1
Type Dry single plate with diaphragm
Size mm(in) 215 (8.465) 225 (8.858) 240 (9.449) 250 (9.843) 260 (10.24)
Clamping force kg(lb) 500 (1103) 500 (1103) 560 (1235) 640 (1411) 735 (1621)
(N) (4903) (4903) (5492) (6276) (7208)
Pressure plate
Outside diameter mm(in) 215 (8.465) 225 (8.858) 240 (9.449) 250 (9.843) 260 (10.24)
Inside diameter mm(in) 150 (5.906) 154 (6.063) 160 (6.299) 160 (6.299) 170 (6.70)
Driven plate
Thickness mm(in)
at free 8.4 (0.331) 8.6 (0.339) 8.0 (0.315) 8.2 (0.323) 8.3 (0.327)
at compressed 8.0 (0.315) 7.8 (0.307) 8.0 (0.315) 7.8 (0.307) 8.0 (0.315) 8.0 (0.315)
CLUTCH CONTROL LHD RHD
Type Hydraulic
Pedal free play mm(in) 5.0-15.0 (0.2-0.6)
Pedal height mm(in)
4JG2T 185.5-195.5 (7.30-7.70)
Others 178-188 (7.01-7.40) 216-226 (8.50-8.90)
Master cylinder
BoreStroke mm(in) 15.8735 (0.6251.38)
Slave cylinder
BoreStroke mm(in)
HEC Engine Series for
LHD/4JA120.6416 (0.8130.63)
HEC Engine Series for
RHD/4JB1T/4JG2T22.2215 (0.8750.59)
6VD1 22.2217 (0.8750.67)

CLUTCH 7C-3
GENERAL DESCRIPTION
HYDRAULIC CONTROL TYPE
HEC Engine Series4J Engine Series
6VD1
The clutch assembly consists of the pressure plate, the clutch cover, the diaphragm spring pivot pin and the driven
plate assembly.
The clutch pedal is connected to the shift block through the clutch shaft and the shift fork.
The driven plate assembly is installed between the flywheel and the pressure plate.
Diaphragm spring pressure holds the driven plate against flywheel and the pressure plate to provide the friction
necessary to engage the clutch.
Depressing the clutch pedal moves the shift fork against the shift block.
The shift block forces the release bearing against the diaphragm to overcome the force of the diaphragm spring and
separate the driven plate from the flywheel and pressure plate to disengage the clutch.
Except 6VD1 (3.2L) engine model, the conventional push-type clutch is used.
For 6VD1 (3.2L) engine model, the pull-type clutch is employed. The pull-type clutch is disengaged by pulling the
release lever (release bearing) to disengage the pressure plate.

7C-4 CLUTCH
MASTER CYLINDER
6VD1 LHD Model Except 6VD1 LHD Model
The master cylinder converts mechanical energy into hydraulic energy.
Depressing the clutch pedal causes the push rod to move against the piston to close the return port.
Clutch fluid is forced out of the master cylinder.
Releasing the clutch pedal causes the return spring to force the piston back to its original position.
The return port is opened and the clutch fluid flows back into the fluid reservoir.
Quickly releasing the clutch pedal will cause the fluid pressure at the return spring side to be lower than the fluid
pressure at the push rod side.
This allows the fluid at the push rod side to quickly flow to the return spring side through a port in the piston head.
This equalizes the pressure at both sides of the piston.

CLUTCH 7C-5
SLAVE CYLINDER
MUA Series
MSG Series
4J Engine Series
6VD1 Engine Series
The slave cylinder converts hydraulic energy into mechanical energy.
Hydraulic fluid supplied by the master cylinder moves the slave cylinder piston to actuate the shift fork.
The mechanical energy produced by the slave cylinder is directly proportional to the diameters of the master
cylinder and the slave cylinder.
A bleeder screw is provided to bleed the slave cylinder.

7C-6 CLUTCH
HYDRAULIC DAMPER CYLINDER
Except 6VD1 LHD Model
The hydraulic damper cylinder is installed between the master cylinder and the slave cylinder to smooth out
variations in clutch pedal feel.

CLUTCH 7C-7
PRESSURE PLATE ASSEMBLY
HEC Engine Series4J Engine Series
6VD1 Engine Series
The pressure plate assembly consists of the clutch cover, the pressure plate with diaphragm spring.
Operating the clutch pedal causes the pressure plate to move in an axial direction to engage and disengage the
clutch.
DRIVEN PLATE ASSEMBLY
The driven plate assembly consists of the plate and the facing.
The plate consists of the clutch center, the cushioning plate and the torsion springs.
The facing is riveted to both sides of the cushioning plate.
The cushioning plate provides a longer service life by minimizing wear and vibration at the clutch contact surfaces.

7C-8 CLUTCH
TORQUE SPECIFICATION
STANDARD BOLTS
The torque values given in the following table should be applied where a particular torque is not specified.
N
m (kgfm/lbft)
Strength 4.8/4T 7T 8.8 9.8/9T
ClassRefined Non-Refined
Bolt Identifi-
cation
Bolt
Diameter
Pitch (mm)
-
M6 1.0 6 (0.6 / 52 lb.in) 7 (0.7 / 61 lb.in) 8 (0.8 / 69 lb.in) -
M8 1.25 13 (1.3 / 113 lb.in) 17 (1.7 / 12) 20 (2.0 / 14) 24 (2.4 / 17)
M10 1.25 27 (2.8 / 20) 37 (3.8 / 27) 42 (4.3 / 31) 50 (5.1 / 37)
M12 1.25 61 (6.3 / 45) 76 (7.8 / 56) 87 (8.9 / 64) 95 (9.7 / 70)
M14 1.5 96 (9.8 / 71) 116 (11.8 / 85) 133 (13.6 / 98) 142 (14.5 / 105)
M16 1.5 130 (13.3 / 96) 170 (17.3 / 125) 193 (19.7 / 143) 200 (20.4 / 148)
M18 1.5 188 (19.2 / 139) 244 (24.9 / 180) 278 (28.3 / 205) 287 (29.3 / 212)
M20 1.5 258 (26.3 / 190) 337 (34.4 / 249) 385 (39.3 / 284) 396 (40.4 / 292)
M22 1.5 332 (33.9 / 245) 453 (46.3 / 335) 517 (52.7 / 381) 530 (54.1 / 391)
M24 2.0 449 (45.8 / 331) 570 (58.2 / 421) 651 (66.3 / 480) 692 (70.6 / 511)
* M10 1.5 26 (2.7 / 20) 36 (3.7 / 27) 41 (4.2 / 30) 48 (4.9 / 35)
* M12 1.75 57 (5.8 / 42) 71 (7.2 / 52) 80 (8.2 / 59) 89 (9.1 / 66)
* M14 2.0 89 (9.1 / 66) 110 (11.2 / 81) 125 (12.7 / 92) 133 (13.6 / 98)
* M16 2.0 124 (12.7 / 92) 162 (16.5 / 119) 185 (18.9 / 137) 191 (19.5 / 141)
Flange BoltM6 1.0 7 (0.7 / 61 lb.in) 8 (0.8 / 69 lb.in) 9 (0.9 / 78 lb.in) -
M8 1.25 15 (1.5 / 11) 19 (1.9 / 14) 22 (2.2 / 16) 26 (2.7 / 20)
M10 1.25 31 (3.2 / 23) 41 (4.2 / 30) 47 (4.8 / 35) 56 (5.7 / 41)
M12 1.25 69 (7.0 / 51) 85 (8.7 / 63) 97 (9.9 / 72) 106 (10.8 / 78)
M14 1.5 104 (10.6 / 77) 126 (12.8 / 93) 144 (14.6 / 106) 154 (15.7 / 114)
M16 1.5 145 (14.8 / 127) 188 (19.2 / 139) 214 (21.8 / 158) 221 (22.5 / 163)
M18 1.5 - - - -
M20 1.5 - - - -
M22 1.5 - - - -
M24 2.0 - - - -
* M10 1.5 30 (3.1 / 22) 40 (4.1 / 30) 46 (4.7 / 34) 54 (5.5 / 40)
* M12 1.75 64 (6.5 / 47) 78 (8.0 / 58) 89 (9.1 / 66) 99 (10.1 / 73)
* M14 2.0 97 (9.9 / 72) 119 (12.1 / 88) 135 (13.8 / 99.7) 144 (14.7 / 107)
* M16 2.0 137 (14.0 / 101) 178 (18.2 / 132) 203 (20.7 / 132) 210 (21.5 / 155)
The asterisk * indicates that the bolts are used for female-threaded parts that are made of soft materials such as
casting, etc.
FLARE NUTS
Pipe diameter mm (in) Torque Nm (kgfm / lbft) Pipe diameter mm (in) Torque Nm (kgfm / lbft)
4.76 (0.187) 16 (1.6 / 12) 10.00 (0.394) 54 (5.5 / 40)
6.35 (0.250) 26 (2.7 / 20) 12.00 (0.472) 88 (9.0 / 65)
8.00 (0.315) 44 (4.5 / 33) 15.00 (0.591) 106 (10.8 / 78)
Standard Hex.
Head Bolt

CLUTCH 7C-9
SPECIAL PARTS FIXING NUTS AND BOLTS
Nm (kgfm/lbft)
HEC Engine Series LHD Model
19.63.9 (2.00.4/14.52.9)
11.8
2.9 (1.20.3/8.82.2) 15.7
4.9 (1.60.5/11.63.6)15.7
2.9 (1.60.3/11.62.2) 17.6
4.9 (1.80.5/13.03.6)