Service Bulletin

Toro Customer Bulletin VEH #09-21 Page 1 of 1

Driveline Noise Workman HDX Automatic September 22, 2016

Customer Bulletin

Commercial Products

Vehicles

#09-21

Driveline Noise When Changing Direction

Product: Workman

HDX Automatic September 22, 2016

Affected Units:

Models:

07390

07390H

07390TC

Serial Numbers:

314000101-315009999

Situation:

Complaints of a noise or “clunk” have been reported in the vehicle driveline during gear

engagement or when shifting between reverse and forward gears. A secondary, but related

complaint of harsh or jerky acceleration off idle has also been reported.

Machine factors to verify first are;

• Correct low idle engine speed; 2014- 2015 units – 1100 +/- 50 rpm, 2016 units and up-

1300+/- 50 rpm.

• The machine must never be shifted while rolling or in motion. Come to a full stop before

actuating the shift lever.

• Correct gear shift cable adjustment, the shift lever on the gearbox must land in the center of

each gear position detent.

If these above items are correct, the likely root cause of the noise complaint can be related to

the design of Cam Assembly (130-4056). A slot feature was eliminated in an update to that part

for late 2015 and later production. The updated design of Cam Assembly (133-0571) eliminates

the slot feature that can allow additional free play of the Secondary Clutch. The free play is

most apparent when changing vehicle direction, customers describe as a knock sound.

Instructions:

Contact your local Toro Commercial products distributor for more information on this issue and to

obtain Cam Assembly (133-0571). Please reference Commercial Service Bulletin Vehicles 09-21,

“Driveline Noise When Changing Direction”, dated 9/22/2016, when making your inquiry.