NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 5-39
CHAPTER 5 MANUFACTURER’S INFORMATION
C-6 TRANSMISSION SERVICE
Neutral Start Switch
The neutral start switch is a safety device that prevents the engine from starting if the
transmission is in any shift position other than NEUTRAL.
Adjusting the Neutral Start Switch
NOTE: The neutral start switch may also be checked by attempting to start the engine
with the gear shift lever in each shift position.
This switch is a combination unit located on the automatic transmission shifter shaft in
the engine package.
1. Remove clevis pin holding shifter arm to cable clevis.
2. Connect a volt-ohm meter (on resistance range) or a continuity tester across both
Red/Blue wires coming out of the switch.
3. Loosen hold-down bolts on switch and rotate switch until contact opens for the same
throw of shifter arm either side of Neutral.
4. Retighten switch bolts and recheck adjustment.
5. Replace clevis pin.
Replacing the Neutral Start Switch
1. Remove neutral start switch from transmission case. Catch uid in a clean container.
2. Move control lever to NEUTRAL position. Check to see that the switch operat ing
lever nger is centered in switch opening in transmission case.
3. Install switch and tighten to 24 ft./lbs torque. Readjust switch.
IMPORTANT! Be sure the switch packing is properly installed to prevent oil leakage.
4. Add uid to transmission if needed.
JANUARY 31, 2008
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