Service Manual

Assembly of Torque Spring Set
If the torque spring set has been disassembled or parts
replaced, reassemble and adjust the torque spring set
using the following procedure.
IMPORTANT: The torque spring set has been ad-
j
usted and sealed at the factory. Do not remove,
disassemble or adjust this device unless necessary.
The torque spring set adjustment is very sensitive.
Improper adjustment can vary fuel delivery to under
power or over fuel the engine.
1. Assemble the torque spring set as shown in
Figu
re 37.
2. Use a screwdriver operated by fingertips to lightly
tighten adjustment screw until resistance to rotation is
felt. Lightly lock the screw in position with locknut.
3. Set dial on spring scale to zero (0). Tighten spring
ca
se until a value of 1270
+10
– 0
grams is obtained. Lock
the spring case in that position with special nut.
4. Temporarily loosen adjustment screw until to get a
value of 1070 grams then retighten the screw until a
value of 1270
+0
– 10
grams is attained. Lock the adjust-
ment screw in position with locknut.
Liquid Cooled
Diesel Engine
5. To inspect torque spring set for proper adjustment,
use a test set up as shown (Fig. 38). Gradually push
scale against torque spring set until stopper is moved
(or pointer of dial indicator moves). Check that load
a ppli ed t o to rqu e sp rin g at th a t mo me n t is
1250
+20
–30
grams.
Figure 37
Figure 38
Workman 3300-D/4300-D
Page 4 - 49 Liquid Cooled Diesel Engine