Yanmar 1GM User Manual page 197

ELECT RICAL SYST EM
2. Disconnect the sole noid termin al wires. See Figure
15.
J .
Remove the sta rter motor mounting bolts. Pull the
sta rter motor away fro m the flywheel and remove it from
the engine.
4. Installation is the reverse of removal. Tighten mount-
ing bolts to torque specified in Tab le 2.
Solenoid Re moval/I nstallatio n
To remove the solenoid it is necessary to partially d isas-
semble the starter. Note that the starter used on series
10 M, l GM IO, 2GM . 2GM20. J G M and 3GM30cngines
arc equipped with an antitorq uc spring that stabilizes the
actuating yoke.
I. Remove the starter as previously described.
2. Disconnect the soleno id term inal wires (Figu re 15).
3. Remo ve the screws securing the solenoid to the starter.
The solenoid will
be
loose but still attached to the actua t-
ing yo ke in the starter. It is necessary to partially disas-
semble the sta rter to rem ove the so leno id and yoke.
4. Remove the
1\\'0
throug hbo lts (29. f igure 16 or 33 ,
Ftg ure 17).
NOTE
Do not allow the armature to moveforward
because the commutator may slide out ofthe
brushes, which will require disassembly of
the rear of the starte r to reins tall the
brushes.
5. Carefully separa te the drive end cover (3. figure 16)
from the frame ( 15 or 22) so the arm ature shaft wit hdraws
from the drive end hou sing, but stays in position in the
frame .
191
6. Remo ve the sole noid with the actuating yoke (6, f ig-
ure 16 or 7, Figure 17) and spring. if so equipped.
7. Remove the yoke and spring, if so equi pped. from the
solenoid.
8A. To install the sole noid on models equipped with an
antitorque spring. reverse the d isasse mbly procedure
while noting the following:
a. Position the antito rque spring on the sole noid
plunger so the spring ends fit in the holes in the sole-
no id (f ig ure 18).
b. Posit ion the yok e in the solenoid p lunger so the
notch on the yoke fits against the closed
end of the
anti-torque spring as shown in Figure 18.
c. Make sure the open end of the yoke properly en-
gages the cars on the overrunning clutch body (Fig-
ure 19).
8B. To install the soleno id on mod els not equip ped with
an antitorq uc spring, reverse the disassembl y proc edure
while noting the follo wing:
a. Make sure that the pad s on the open end of the yo ke
properly fit between the flanges on the overrunning
clutch body.
Bru sh Repl a cem en t
IG.\I. IG,\l10. 1 G.\I. 1G.\110. 3G.\I and 3G.\l30
models
Brush replacement requ ires partial d isassembly o f the
starter.
1. Disconnect the positive lead from the solenoid .
2. Remove the cover (26, fi gure 16) on the end cap.
3. Detach the E-ring (25, Figur e 16) and remove the
washers from the arma ture shaft.
4. Remove the brush holder retaining screws (30, Figure
16).
5. Remove the two throughbo lts (29. Figure 16).
6. Separate the end cover (2 1, Figure 16) from the starter.
7. Note the position of the brushes in the brush holder.
Use a suitab le tool to pu ll back and hold the brush retai n-
ing clip. then remove the brush. See figure 20 , typical.
Repeat this step to remove the rema ining brus hes.
8. Remove the brush holder from the arm ature shaft .
9. Use an ohmmeter or self-powered test lamp to check
for continuity between the insu lated brush holder and the
base of the brush holder assembl y. See fi gure 21. If there
is continuity. rep lace the brush holder.
10. Inspect brush and brush spring condition. Measure
brush length. Repla ce all brushes if any are oi l-soaked or
worn to 12 mm (0.47
in.)
or less in length. Repla ce any
broken or distorte d brush springs .
9