Yanmar 4LHA-HTP Operation Manual page 568

Chapter 7 Reduction and Reversing
6. Reassembly
6-2 Reassembly of input shaft
(1) Drive in the ball bearing and fit the snap ring into the
input shaft gear.
(2) lnsert the cup springs, spacer, plates (A) and plates
(B) and temporarily lock the lock nut.
Special tool for Ring nut wrench
NOTE: Apply lube oil to each insert part.
(3) Fit the O-ring onto the input shaft.
(4) Drive the ball bearing and the inner bearing race
using a inserting tool.
(5) lnsert the input shaft into the plate (A).
(6) Take out the input shaft again.
(7) Tighten the nut firmly by using a special tool, then
return the nut to 45 - 90 degrees.
Gear
F
Special tool for
ring nut wrench
7-1-32
(8)lnsert the input shaft, then measure the torque of
the input shaft using a torque wrench.
N u t ^ P l a t e (B) t= 0.4mm
Torque:
NOTE.Match up the teeth of plate (A).
(9)Take out the input shaft and calking the lock nut
end of the thread.
(10) lnsert the input shaft into the input gear assembly.
(11) Drive in the inner bearing race onto the input shaft
end.
4LHA Series
23 pieces
Plate (A) t = 1mm 22 pieces
Cup spring
Wrong
Torque wrench
785-883N-m
(80-90kgf-m)