Takeuchi TB 175 Handbuch Seite 761

4)Remove a fuel pump, and read the fuel injection angle recorded in that fuel pump.
5)Read the injection angle recorded on a newly assembled fuel pump and calculate the difference from the
injection angle of the disassembled fuel pump. (When re-installation does the same fuel pump, the angu-
lar difference is zero.)
Fuel injection angle difference ∆ θ
Calculation example
Fuel injection angle
Fuel injection angle
of a new fuel pump
difference
θ
(degree, cam angle)
(degree, cam angle)
+0.5
-0.3
[NOTICE]
Tell the fuel pump number to Yanmar, and inquire the injection angle of the pump when it is hard to find out.
6)Put the fuel pump on the gear case temporarily and install the drive gear on the cam shaft with checking
the ID marks, which were put on the fuel pump drive gear and the idle gear at the time of the disassem-
bling.
Tighten the installation nut of a pump drive gear.
Model Fuel pump model
3TNV82A to TNV88
4TNV94L/98/106 (T)
7)Adjust the installation angle of the fuel pump while
reading the injection angle difference, calculated in
the above 5), withe the mark (minimum 0.5°, cam
angle) of the adjustment mark sticker..
[NOTICE]
Push down the fuel pump in the outside direction of the
cylinder block at +0.5 degree(cam) when a injection
angle difference ∆ θ
i
And, push it down to the cylinder block side at 0.3
degree(cam) when a difference is -0.3 degree(cam).
8)Tighten the fuel pump installation nuts.
(cam angle) = (the fuel injection angle θ
i
- (the fuel injection angle θ
Fuel injection angle
of a disassembled
fuel pump θ
i2
(degree, cam angle)
8.5
7.7
Tightening torque
MP2 78 to 88 (8 to 9)
MP4 113 to 123 (11.5 to 12.5)
is +0.5 degree(cam).
of a disassembled previous fuel pump)
i1
Fuel pump installation method
i1
Turn the fuel pump body in the outside
directon of the cylinder block at 0.5
8.0
degree(cam angle).
[Advanced injection timing]
Turn the fuel pump body in the inside
direction of the cylinder block at 0.3
8.0
degree(cam angle).
[Delayed injection timing]
N•m (kgf•m) (thread portion, and seat surface)
Mark-off ling on fuel pump
0.5
In case of +
Injection angle adjustment
48-1
2. Inspection and Adjustment
of a new fuel pump)
i2
Lubricating oil application
Not applied
Mark sticker
1 cam
0.5
Standard
mark
0.5
1 cam
Incase of -0.3
cam
cam
cam
cam
(R.1)