Disassembly of Yanmar Starter Motor (4TNV94L 98, 4TNV106(T))

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For Yanmar diesel engines used in agricultural equipment, excavators, tractors, marine generators, and diagnostic tools.

(1) Disassembly Order

Nut M8 (Disconnect the connecting cable)
Screw M4 (2)
Through bolt M5 (2)
Rear cover
Brush holder
Yoke clip
Return spring
Pinion shaft
Clutch assembly

(2) Disassembly Procedure

Nut M8

Remove the nut M8 (12mm) from the magnet switch and disconnect the connection cable.

M4 Screws (2)

Remove the two M4 screws.

M5 Through Screws (2)

Remove the two M5 through screws.

Rear Cover

Remove the M4 screws securing the brush holder to the rear cover.
Remove the through screws M5 and then remove the rear cover.

Brush Holder

Use a brush spring puller to pull the brush springs upwards.
Touch the negative (-) side brush spring to the side of the brush and release it from the brush.
On the positive (+) side, pull the brush out of the brush holder.

Yoke Assembly

Remove the yoke clip and then remove the yoke assembly.

Anchor

Remove the brush holder.
Remove the anchor and yoke assembly.

M6 Screws (2)

Remove the M6 screws (10mm) to remove the magnetic switch.

Magnetic Switch

Remove the magnetic switch.

Dust Cap

Remove the dust cap from the gearbox housing.

Shift Lever

Remove the gear lever.

M4 Screws (3)

Remove the three M4 screws.

Bearing Holder

Remove the bearing holder.

Gear Case

Remove the M4 screws to remove the bearing holder and clutch assembly.

Pinion Stopper Clip

Remove the bearing holder and bearing at the end.
Slide the pinion stopper inwards.
Use a screwdriver to pry off the pinion stopper clip.

Pinion Stopper

Remove the pinion stopper.

Return Spring

Remove the return spring.

Pinion Shaft

Remove the pinion shaft.

Clutch Assembly

Remove the sprocket stopper clip.
Remove the pinion stopper, return spring, pinion shaft, and bearing holder.

YANMAR Diagnostic Service Tool (YEDST) Yanmar Agriculture Construction Tractor Diagnostic Tool

Disassembly is now complete.

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