Isuzu N-Series. Manual - part 855

MANUAL TRANSMISSION 7B-81

8. Assemble the 4th-5th clutch hub assembly &

sleeve following the procedure below.
a. Assemble securely the insert (2) to the insert

groove of the block ring.

b. Install the insert spring (3) to the insert.

Caution:

• When assembling the insert spring, equalize the

length of the both edges of the spring not to ad-
versely interfere with the inside diameter of the
hub.

• Make sure that the open part of the insert spring

assembled on the reverse side, is not aligned with
the open part of the front side.

c. Check that the clutch hub (5) and sleeve (4) are

smoothly sliding.

• The arrow (1) indicates the front side of the

transmission.

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7B-82 MANUAL TRANSMISSION

9. Apply engine oil 5W-30 sufficiently to the needle

bearing, 4th gear thrust surface and synchro cone
taper, and install the 4th gear (5) and needle bear-
ing (4) with the dog gear turned upward.

10. Apply engine oil 5W-30 to the 4th block ring (3),

and install.

11. Turning the surface with oil groove downward,

align the 4th-5th clutch hub assembly and sleeve
(2) to the groove of the 4th-5th block ring, and then
insert with a press using the installer 5-8840-2345-
0.

12. Install the snap ring (1) using snap ring pliers.

Caution:
Replace deformed or damaged snap rings with new
ones. Check that the parts are securely installed.

13. Assemble the 1st-reverse clutch hub assembly

and sleeve following the procedure below.
a. Install the block and spring to the clutch hub.
b. Inside the sleeve, there are three ball grooves.

Align the phase to let the ball enter the ball
groove.

c. Insert the sleeve (1) until the block slightly over-

laps the clutch hub (5).

d. Securely insert the sleeve until the ball enters

the ball groove of the sleeve by pushing the ball
(2), block (3) and spring (4).

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MANUAL TRANSMISSION 7B-83

14. Apply engine oil 5W-30 to the needle bearing, 1st

gear thrust surface and synchro cone taper sur-
face, and then install the 1st gear (6) and needle
bearing (5), turning the dog gear upward.

15. Assemble the 1st inside ring (4), 1st outside ring

(3) and 1st block ring (2), inserting the nail of the
outer ring into the dog gear hole of the 1st gear. At
this time, make sure to apply engine oil 5W-30 suf-
ficiently to the both sides of the inside ring and out-
side ring, and inside diameter surface of the block
ring.

16. Insert the 1st-reverse clutch hub assembly &

sleeve (1) with a press using the installer 5-8840-
2345-0, setting the six nails of the inside ring to en-
ter the six holes of the hub. 

17. Apply engine oil 5W-30 sufficiently to the reverse

block ring (4), and then align the phase of the block
ring groove to the 1st-reverse clutch hub assembly
and sleeve, and install.

18. Apply engine oil 5W-30 to the needle bearing, the

reverse gear thrust surface and the synchro cone
taper. Turning the dog gear downward, align the
phase of the synchro cone phase of the reverse
gear to the nail of the outer ring, and then insert the
reverse gear (3), needle bearing (2), and collar (1)
with a press using the installer 5-8840-2345-0.

19. Install the spacer (2).
20. Insert the bearing (1) with a press using the install-

er 5-8840-2345-0, turning the stamped surface (4)
upward and the stamped surface (3) downward.

21. Install the 6th gear.

• Install with the convex part at the bottom.

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7B-84 MANUAL TRANSMISSION

Special Tools

Illustration

Tool Number / 

Description / Remarks

5-8840-2345-0 / Clutch 

Hub & Collar Installer

N7A1222E

5884023450